Local Group Cluster Search

Results from LGCS for M33

The Local Group Cluster Search's work in the Triangulum galaxy (M33) has resulted in a catalog of 1214 star clusters!

The project has also resulted in two scientific publications:

• The Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER). IV. Star Cluster Catalog, L.C. Johnson et al., 2022, Astrophysical Journal, 938, 81 (HTML or PDF)

• The Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER). III. The Mass Function of Young Stellar Clusters in M33, T. Wainer et al., 2022, Astrophysical Journal, 928, 15 (HTML or PDF)

The LGCS Team thanks and acknowledges the efforts of ~2,800 Zooniverse volunteers who made this work possible. We list of names of known registered users below.

Hijan Hameez, william a collins, Simon Kimberly, 1Sunnieboy, Jack Buker, James Ritter, Ilya, Malte Jensen, Erynn Wilson, Ray Lee, XI LIAO, Clément Henri J. Marshall, Abi Hession, AMCVT, Abigail Pietrow, Aaron Aguilar, Aaron Hepomaki, Abigail Brown, Abrougha, Abner Santiago De la Hoya Badillo, Adam Shirley, Aaron, Aekzo, Haven Brent Howatt, Ashwani, Alan M. Gross, Alan Taylor, Alex Wilmot, Alex Hine, Adam Kuboš, Eddie Brooks, Aliencapo, Alizah., Allison Tietz, Ally, A Argyle, Amanda Ferrone, Amber Davis, Lyn Robinson, Andrej Galinac, Andruha_T, Andrés Guillermo Stenner, Angelika Kriesel, Anik_1976, Anna, Tommy, Anthellis, Antiquarian, Aparna Ranjit Kandamparambil , Allan B Greybill, Britta-Karin Engberg, Rob Gee, Clay R. Churchill, Aimee Richards, Antonia Fleming, Ashley Renee Kuntz, Ashley Rein, Christopher Snapp-Kolas, Austin, Alex McColgan, Audburrito, Aza, Bradner C. Jones, B L Goodwin, Kaytlin Chavez, Balcil, BananaR4ma, BarbaraLawson, Barbra Zier, Barry Williamson, BastianVzla, Brynn COlwell, Brendan Cone, Beata, Becca, Charley Watson, Bettervision, Benjamin, Bianca Donolo, Mark Redgwell, Brianna Garcia, BlueMagic, Bo Krause, Matthew, Robert Caniga, Bobby06, Jasar Alijev, Bob Ramsden, Paul fielding, Inger Viken, BOURRY, Pam Wilson, Brandon Kozar, BrianVonWhisenant, Brickironjaw, Terry Crews, Mr. Chotipong Sinayruraj, Chikhacheva Natalia, Cajsa-Stina Erixon, Joel Oxley, Gary LaVergne, Neeve OFM, Jürgen Graf, Chris, Cara Santoro, Richard Lovell, Catalina Pereira, Ciobanu Gheorghe-Dorin, Sue Keating, Caroline Isom, Charlotte Goublin, Chadwick17, CharlietheChump, Ken Yinger, Chinabob, Cho_Hyunwung, ChrisMolloy, Christina Naylor, ChristinaWillan, Norbert Meyer, ChronoTrigger, ChuckNorris8, C. Sylvester, Sharon Tringham, Claudio_Pulcher, Cade, Brian cloke, Cooper A. Chaney, Pedro Mineiro Cordoeira, Vijayatha V, Crispy_Penguin, Chris, Ross Duncan, DABSON, DCCstudents, DG, DITTMERII, Daniel J H McDonald, DJofAwesome, Dijana, Don Sailing, Ella Potts, Bryson Miller, DanForster59, Dan Nguyen, DanRies, Dario scattone, Adam Castle, Daryana, Rhys Scully, David A. Douthett, DavidFoss, David Floyd, Muthu dhivakar, Dilpreet Deol, Demeter Alexandria, David Bloomberg, Cary Manttari , Sean E Walton, PhD ABD, Denny2507, Diane Delvendiep, Iezzi Giovanni, Dillen, DimGrayFuzzy, Dina Moro, De'Gina, Dlo78, Frederick Nicholson, Doggy_203, Ivan Terentev, DonaldWM, Don Gray, Donald W. Schoenhofer, DoubleTwelve, DrPZ, Pierre Guimont, Drake Olinger, Drtscience, Sean Duffy, dakota yetman, Dympna Molloy, Dzintra Richards, Elizabeth Caswell, Edward Erik Zuidema, James D, EValleyY6, Eben8558, Ecim, Eco23, Edoardo Antonini , Erin Labrecque, Elisabeth Baeten, Liz Richardson, Ellysha, ElongatedMuskrat, Emdorphin, Emma, Emma fisher, Mutanda Makizolele , Eric Kerkhofs, Eskil Swahn, EvEnuS17, Evega, Everest4, Expirementing, Felix, Hamish and Andrew Koc-McDonald, FViktor, Bill Shaw, Faso95, Jonas Cliff Hylén, Fazal.H, FedePole, Fishquill, Félix_ERNEST, Kathryn Lewicki, Franck GUINDON, František Odvářka, FredVanCor, Thomas Zolotor, FriVan, Patrick, Frank van den Hout, macio parra, Garry Pennell, Lana, Chloe Stark , Sabine Tronco, scott thew, Garra2020, Geek2, Geoff_Burke, Kristen Giersch, Alexander F. Jonkeren, Eric Moreno, Giospace, Giovanni Solis, W. Kirk Stinchcombe, Markus Biburger, Gerald W. Nash Jr., GobalScience, Golgarath, Gordon-1, Darryl Glenn gore, G. Prunier, Guilherme Oliveira, Reynald Nicod, Heather Lawn, Harry Pommier, Harshil, Helen_Gallegos, Hender32, Jörg Schümann, Hercules66, HereComeTheFleet, Deryck Smith , Hippo-nova, HobbitJack, Hubert , Hunter Barickman, Timo van der Straeten, Hein VanLuik, Iain Bryant, Ian1covkid, Ian Metcalf, Indeterminate, Ionepositivo, Judith Gordon, Ishaan Pathak, Jeff Price, Jacob Stock, Jason Raimondo, Jerry Nicholson, Jamie Dawson, Jeremy, John W Garden, Jack Girard, Jonathan Martin, JWright19, JackCorrough, Jake McLain, Roy Jackson, Jack Riordan, Jackson Felty, JadenOtacon, Jahniya Wilson, Peter M, Stuart King, Jan Muller, Jan_Bowcut, Jan_Gropper, JanaI-Amitaf, JannaVisnen, Manny J, Jarold, JeanNimes, Jean Tate, Jeff_Pyman, Kerry Page, JenTheFox, JieLinYang, JillJLepard, JimW59, Jinxy, João Victor, Jo Denton, JoeRiccio, John Head, John Hotchkizz, JohnSnell, John_Kap, Jochem de Winter, Jolina Robles, Jakub Omeljaniuk, Joshuah Naghiu , Joshua Dunstan, Kristian Horvli, Juan Green, Julian Davies , John Briol, Sander Visser, LAURA MORTENSEN, KJDL80, Kakasdodo, Ross Perfect, Ino Alagic, Karandip Dhanjal, Karen Biseker, Christian Wirtz, KarlPettit, Ken Armes, Kat Farr, KataCroft, Kay Rozeboom, Kathrin71, Kathleen M. Ross, Katsarowa, Kelly, Keith Marley, Keivel44, Damian Kemp, KenthoBirne, Dorothy Petrone, Kerry Knight, kevin Heijnen, Kevin_Dyke, Mika Emeth , Sandra Lee Harris, MDiv, Fairley Kenneth Cessna, Kishan Ved, Kjell Naessens, Faron Racca, Kobus Kapp, Terrence Branscombe, Meghan Walsh, Kevin Gauthier, Jakub Hrala, Kunu, Kylie rivera, Erik Luckjohn, Stephen Bean, FISCHER, LSKE1929, Cingh Theih Kim, Larry B. Keese, Larry West, Laura Deacon, Lauren Karas, Laurent.gauch, Peggy Lehmann, Leusane da Rocha Lordêlo, Alexander, Astrid Smit, Marta Anna Orlowska, Linda_J._Berkel, Lindsay Constable, Andrew Blackman, Loraccarol, Jan Prudký , LordNeveris, Krzysztof Gmyr, LucyitSwD, Nina Allen, Luksius, Maksym Abramov, Morgan Griffin, Marlena Holloway, Millie Boardman, Jill Keddie, David Nelson, Mad_Mac, Gaspard Delpierre, Kathryn Ake, ManasiAnyal, Amanda Wilson, ManishRai, Maryna Sazhko, Cledison Marcos da Silva, Marcus McEnroe, Marie Hughes , Marijke, Marine COLLET, Marion Negus, Marissa Levine, Mark_Moffatt, Marley Rosinia-Cowan, Sandrine Toutain, Mathiasrex, Mateusz Zamiara, Matthew Amuguni, Matteo Riboni, Matthew Dewey, MatthewElliman, Mattia_Verga, Maria, Melina Thévenot, Melissa Brown, KrstnRheingard, Meryl Goulbourne, Mgorman, Michael Schulze, Michidisperso, Michkov, Milan05, Miles Curtis, Milind Rojatkar, MingMing, Mironova, MissLiv, MissMelba, Rachel, Missybee35, Mitukya, JB, Mike Barrett, MonicaSanjinez, Eliane Küpfer, Moominstar27, Morecote, Ron Carleton, Mikhail Morozov, MotuIgwok, Batman, Mark Newman, Jyn Erso, Ria Danes, Mukesh_P, Robert R. Zinn, Nancy Lentz, Nathan Antonicelli, Naomi Minnock, Amy, Nate, Nick boller, Andra Kurlis, Neildouglas, Nekkar4, Nicholas, Nicky Robertson, Nick Hall, NicolasGoupil, Nigel Curry, Diana Dassen, Niranjan_Nair, G. Shearwater, Nolan Judkins, Nolan, Ash scaife, Neil Singh, Sergio Gomar, Flávio Brites, Mirko Masi, Kyle Johnson, Tom Poleski, Olivia Horvatic , Omkar_Jo, Heather Haefner, Kevin Ortiz-Ceballos, Iván Ortiz Estay, Loris Pons bld, Patricia A Kramer, Mark Verner, PILIRANO, Piyush R. Maharana, PJTFernandes, LEONEL VALENTIM HÉGUES NAVA, Junia Paiva, Joe Willis, PalmBeachG, Pandasoccer, Peter Ligertwood, PatrickFarnan, Matthew Lewis, Ismael Lana Rodríguez, Peter A Bayliss, Peter Bergvall, Peter Dzwig, Peter George Saad Naguib, Benoît ROUSSEAU, Philip Nguyen, Tom Hardeveld, Phox, Pia Valentin Sørensen, Pickers84, Clément Dumesnil, Allison Espinosa, Zainab malgi, ProximaCentauriM1, PunkAstronomer, Jared Sawyer, Quantatjana, Ewan Nees, RAHIII, Ruyman Azzollini, Raella Reed Rothman, Rebecca Miller, Rach3254, jose carlos rebeque, RebelXXX, RedRedCat, Remco Kemperman, Esther Rodriguez, Rian MJA Rubingh, Ricardo Bitar, Richard_ziy, chris summers, RikkuBurnside, Rille54, Peter A Cox, R J Mellor, Robert-in-Australia, Roberto Torres, Jeff Detweiler, Mike Anderson, Roger_C, Romuald71, Rpaulley8033, Ryan G. Trofatter, Ryan60002, SASfmp, Simon Brown, SPToad, Lilit Abelyan, Damarys, Samuel Morneau-Gamache, Samantha Horsfield, Samcl, SANTOSH KUMAR JHA, Sara Rupert , Sarah Schultz, Vinit Nirwane , Sasha_2468, Marcio Saviano, Sayles4174, Schnooble, Marc Zizak, Erin Bowman, Trevor Allen Harwood, Sdbail, Sergey Okhotin, Sergey1959, Shahzad Hussain, Sharon Waight, Shaul Lindblom, Shekhar, ShinglesCat, Luka Perić, Bailey Weyandt, Sarah, Silvio de Barros Melo, Simon Gullstrand, Simon, Jeremy shop, Ryan Darnell, SkyDancer, Skydiver33, Slime, Sean Anderson, Veeti Jokinen, Cole Mathews, Sophie Abatzi , Steven Campbell, SouthernGypsies, Chris Griego , Daniel Hughes, Annika, Gwenvaël LE BARON, Spooksters, Storm, Squaaab, SrirangCanTransit, Stargazer50, Darrel Drumm, Stella07, Stellarorion, Estephani TorresVillanueva, SternGucker75, Derrick Stockton, Stof52, Andreas Steinbuch, Michael Emery, Stuart Delaney, Thomas Biggs, Subtilior, SundogWE, G. Cole Davis, Kristen Dorcey-Joyce, Alban Noirtin, Supreeth S, Fredrik Sjoge, Swesen, Ty Bishop, Shelby Schroeder, Fray Burns, Ewa Tyc-Karpińska, Tapio Salmikivi, Tara Fae Kessler-Lapine, Taten, Taylor O'Connor, Taylor , Tatjana Dudas, Talia , Yeh,chia-hsing, Teja Teppala, Teresa_Fearn, Terrance_L._Johnson, Tetic, Ashten Johnson, Joshua McArthur, Brian Francis, TheJadeEmperor, T_Whitman, Clint gazal, Tyler, ThomasBaseden, Thomas Paquet, Tiffen Dbg, TimTaylor, TimothyCatron, Flynn, Tombalf, Tomishko, Tommaso Busellato, Pascal Cheucle, Thomas Cooper, Tony Bowman, Tonylj, Mert Can, Kevin Stroupe, Simon Z., Krystal Rose Molden, Teresa, TwinTapir, Thomas t. Carey, Anthony TREMBLIN , Matthew R. Brannen, Marco Tison, Micaiah Balonek, Cory Shires, Uri Shlomov, Marc Backhaus, Valentina Piperissa, Filip Vandelook, VanillaCrash, Veronica Hernandez, Vicki Vermaak, Vishal dhasmana , VinceVega, Vincent Rydstrom, Violetstar, Vicki Morrow, Vladut_Mihai, Volodiag, VoxelJ, Vynai, WEBs_in_space, Lorna Francis, Emily Purinton, Raven Goodwin, Richard Ryan Rote, Willian Treviso, Wesly Rice, Wendy Hawkins, YPaquette, YUYING, Yilun, YooRec, Olivia Korensky , Julien Perico, Youssef Mojahid, Zany_Zebra, Zachary Dillinger, Zenia Skytte Sørensen, Sue Little, Zth19, René Wels, Marian Zima, Thomas, a-ikiso, aanchal3051, Jeffrey Carels, Abby Seyer, abruski, acelepage, Ada-Rene , adamzwawy, aderick, admean, Averil Drummond, Ewen Ellen, aerialsilks, Amy Gizas, Angela van Tilborg, Dr AL M Davies, alan_teale, Alexis Herman, Alexander Jackson , Alexander Kuzmin, algr11, Elizabeth Caton, ameza, Angelica Moreno, amster_girl, anaduviledam2019, andrew_coomber, andrewfarrow, andrey373, Anand sagar, anesterenko, Angela Ixim , Angel Nguyen, Nicole Angiuoli, Phil Taylor , anilseth, Anna Riordan , Martin Goulet, Valerie Sousa, Anthony Neale, anujsoni33, apoanum, Bernard Penny, ar.guz, Ariane Dungo, arnot, Janet Jones, Anas Salloum, Anita Springer, astro.c.r., Yiu Ho Lam, ERIC FABRIGAT, astrosandali, Richard Bunche, Thad Szabo, Alexander Svyazin, athenaleigh, Andrew Jensen, atnbirdie, Graeme Aitken, awagostini, awesome_axolotl, Bazzani Umberto, Alan Back, Bailey , Balaji Kartha, BruceL, barbarossa54, barmet76, batist, kylan, Jae Hyun Kim , bazf, William P Collins, Bernard Candela, Brandon John Williams, bearkatz3478, Becky Rother, Rebecca Vyse, bendaitalian, benly, bert_willard, betaorionis71, Lindsey Whiting, Christopher Schmidt, gareth price, billyO13, bimerang, Vincent Levasseur, Steven & Andrew Blodgett, bluesparky2005, bobbieburkett, Bruce Robert Anderson, boomer99, boomod, Brigitte Gottsberger, brian_pollard, brianlkennedy, brianmills26, briev, brigi.baumann, Paula, browolf, brzozowski, bundrew, Bernhard, Connor Marti, Sean Kozen, caidid, cajger, Benjamin Poupard, canbekkorkmaz, Captain Rajeev Nair, Mark P Way, Carlo Lorenzo ruiz, carol_tye, Carolyn Schlesinger, carsonlejeune, caselle11, Catherine L. Ryan, Felix Reisch, Carolyn Bolus , cbsamuels, Carmen Campbell, ccardon, Bjorn Pieper, chris squires, John D. Krull, charlottewood, chateaubleu, cherok12, cherylw55, chocko, Carl Hoddy, Chris Sadlon , chrisusher, chriswalker, chuckneely, cjmenard, Claire Cirrincione, Claire Garvin, catherine hayman, clwisber, Christina M Sobczak, coenegrachts, cof504714, Colin Hislop, cookr1, Cory Dworshak, Robert Vandenberg, cpercival2004, Craig Grimm, cris05, Kelly Christiansen, Christopher S. Bird, Christopher Strauss, Craig Little, cwvann, David BROWNE, dahabes, Richard Smykla, damiwack, Danielle Morgan, Daniel Strauss, danieltabone, darthnick, davestringer, david_inman, David M. Bundy, John Davidson, dawnmdavies, David Blaszkowski, Dominika Bachleda, Dominic Colgan, dday660, deanryanth, Duane Dedrickson, denise_ince, Dennis R. Patten, Sr., Moira Lockington, Tobin Wainer, dfaxon, dgazdik, Dave Miller, Dylan van der Schoot, Steve, discala, Diwas Srivastava, djescreet, junquan yao, David Moulton, Jean Fromentin, dorota_ok, Doug Stapleton, Daniel Crow, dprince, Duane R Amlee, Demi Starick, dstarzfn72, duaned, DUBRULLE JEAN MARC, durgis, dylan kaya roberts, eagleclaw, Ellen Amicarelli, eannari, Natasha Weller, Enrique Boeneker, Elsie Burn, Tara Carlson, echodrops, econseil, Elizabeth C. Stow, edremy, Edwin Joy, egillis214, ehong, Larissa Santiago, ejschelin, Emmanouil Kottakis, elizabeth_s, Elizabeth Case, ellieoban, emmijogirl, epsilongemma, equidad1, Frank Ermes, Ernst Schneidereit, fajxlon, farrider, fabian stans, fatherfish, Fernando de la Cruz, feeder_goldfish, ferlin1998, fintanis87, firejuggler, fisherka, flamewine, focamar, francisa75, Munzar Frantisek, Francis Wolfgang Von Goetz, fred_bichl, frodojep60, gammstrek, garagan, garza29, gaynor1600, Judy Schmidt, geekster123, Geoffrey Kimbell, gldisater, Tudor Gogonea, Graham Sands, Graham Womack, Grace Quinn, graeme94, Dr Graham Dungworth, Lukas Hackl, gsskyles, Joshua Guarino, gwesthof, h.t.archibald, Hannah, hannah , Hope Jeanes, hawkins_ErrorDupUsername, hefe42, Nick LaRoy, helmie, Pete Hermes, Gracen Fonke, joseph, J Cervetti, hipsilou, hitzer, hiwayman, hoddy, hops_splurt, hotdog556, hpaakkanen, Hannah Perkins , hrf_ErrorDupUsername, hsgaskill, Hugh Thompson, huziak, ibnbailey, icarey, ildar_ab, iloveanimal, Jillian Heimerman , imdra, Ian Sweeney, imum, Isabel Navarro, Ine, ingram527, Matthew Walton, Iván López Pérez, Issam Chalouhi, itsacontrolthing, ivann, Izzy Playne, jabeta74, jad1212, jamesbigears, Jane Stockbridge, jangugliotti, jarphys, Jeff Berdel, James C. Merritt, Chris Dubbels, jedkat, jelstone20, jenniferkiwinz, jenniferpena8, Jeremy Myers, jespestana, jhdavies, Jake Hunking, Jianna Guarino, Jari-Pekka Pääkkönen, David Powell, jkern, jlam21xp, jloechner, jmedg00270652, jmichalsbrown, Jennifer Oakes, Jody Wong, joforrest, Johan Klein Entink, johnBunyan, John Mann, John Mitchell Jr, Soyoung Park, jflint, Jon Bylo, jonkatora, Jordan McFarlane, Jordan Soon, Joshua Wenz, jowatch9, Joy Davies, jpk456, jpprufino, Joseph Roth, James Berg, Halley Culver, Jeremy Ross, Joshua Santarelli, Jennifer Thornton, Joseph Nemeth III, Justin Whitney, Jack Thrasher, Jackson Reynolds, Jubel Kurian, Juho Viitasalo, Julia Wilkinson, juliakol, Silvasalta, jvo1, jwcarr252, Jeff Wood, jyetie, Kenneth Martin, Sophia Griffith, Kamila Jurkus, Krzysztof Kanawka, Karen L Yoerger, Karina Lopez, Karina Martinez, Sangbaran Karmakar, karthikeyan.d, kasen03, kasterborous, kaufmann, kay_d, kay_mcmichael, kchiefs, Katie Ciurleo, Katelyn Cygal, keel, Javi Rueda, kennedyclear, kentwsall, kevin rubio, Kevin Hernandez, kgroleau3303, Kiran Almas, kimonpapas, Lihu Kolton, Kees Roovers, Kevin, Katharina Doll, Kevin Murphy, koungeo8, Matthew P. Kowal, Kaitlyn Pomeroy, krannu, kristenmcdaniel, Kristina Klug, Kieran Scott , kudashata, Debbie McWilliam, Lisa Payne, labyrinthrose, ladiebug, Lukas Holej, Al Lamperti, Jack Volinsky, Kristen , Lara Moreno, lasrevin, Brian Chappell, Cliff Johnson, Layla Dissouki , ledox, lenkasm, leonie_van_vliet, les.gibbons, lesbenn, lhawkins6, Liana Boop, lightyear105, anastacia grsik, lillysue, Lily Collins, lindemose, Linnea Nelson-Sandall, liz.chambers, Alice, Calliope Irving, Lachlan J Patrick, lolodec, Lorenzo Magro, Lena Tirva, łukasz, Luke, L. Van Warren, m.c.j.bakker, Maria Luisa Franco, m57ring, maceric, Martin Ende, Jane Thomas, Rinat, amanda gravelin, manxkats, marco.perez481, marcodaz, mardej6646, mardis, Maren Williams, Marius Agafitei, Mark Kilner, markm2315, marse1968, Marsha Speevak, Matej Kosiba, Lord Mati, Matt Baney, matthiasheim24, mattico, mattq9, maxamew, mayomay, Maysarah Islam, mboyer, Maxwell Daly, mdlw, mdob47, Michael Duerr, Megha Sharma, melabugs, melanie-jane, melefthe, William Russell, michael.bresk, michiveda, mieldescausses, Mike Roberts, mikeycrf, milliWHAT, mim5990, Linda, missmacduff46, mitch, Richard Mitchell, Mitchell Cloud, Michael J. Adams, Michael Kovacs, mlettau20, Mohit Gandluru, mohler505412, mokpt3, monicaf, chelsey moore, moretbailly, morganism, Morgan Fletcher, mountainman11, moysestc, mrpsb, Matt Sloyan, mutabilitie, mvt, naavis, nabializm, Nancy Godber , Nathan Davis, Nicholas Moffett, ncameron, Nehemiah Chavers, nchazarra, Neil Johnston, Peter Suchowacky, netbuzz.c, netjeff, ngilbert, Nick Kohout, nick, nicole traher, Michele T. Mazzucato, nj10040, Nathalie Lamond, Nathan Nichol, nutawat9, nwilliams542, Nick Hall, ogden, oksanasmerech87, André Gammelgaard, Jane Bena, Oliver Page, olmy.007, omsison, oonawoodbury, Richard Palmer, Rune Orsval, Jacek Orzechowski, osht, Olivia Wood, Jo Bourne, pandapaul, parkermen, Rachel, patcat, Patricio Perez Villatoro, Paul March, pauldowning, Pawel Tluscik, Popa, Paige Cunningham, Pedro Figueiredo, Josef Markvart, perseph0ne, peter meager, Marika, philippe_bellavoine, Carl J. Hill, Kiril, Ondřej Komárek, pistaccio, placebofer, planetari7, Sam Deen, Samuel J. Goodman, plent2d, ploredo1312, pmj, Joerg Staeheli, Philip O, prtgw, Seoncheol Park, pughd, purechaos123, Pascal Vanryckel , Petra Wingert, Quinn Hardcastle, quarkcharm, racegirlj, John Price, rach37, Racquel Delgadillo, ragnartrains, ragua, Elie Summar, David Aldred, Alexsei Matvienko, rayhsu001, Xeneize Barba, Roger, Rebecca Jenkins, martyn milligan, redshoes, reich, Rémy Prevot, rengber, ricreis, Rhys Morris, Riley Egan, rinscewind, Roman Janíček, rjheyden, rjohnson42, Ricardo Mateus, rmhaliewicz, rob_t, Robert Bankowski, Robin Stratford, robneva, robnez, rodguill, rogue_pieman, ronys, rortlund, Hunter Rothman, roy.burner, royathomas, Roy Crisman, Rachel, rturnbu7, rubeca, Anthony Bungey, Ruby Duncan, Vincent DECKER, rwilliams208, Ralf Stephan, Marianne Armstrong, safiraneo, sagan0224, Rob Conger, sakethreddy, salhol, Julia Konrad, sanilla, satis_ignotus, Savana Johnston, sbkburns, schaack, schaep, Sean Moran, schnaeluslongus, schoedelr, Philip John Knight, Maria Scozzari, Shawn Cruze, Sian Defferary, sdp, Sebastian Pugh, spandana, sharadcseth, Shawn M Wright, shelbie charley, shocko61, Siddhanta Khandelwal , sidharth kapoor, Angela Fuselier, simon_harding, Mark Hackney, sirius_eclipse, sjoh1141, skillman, Sněhota Michal, snikdekl, Allison LaBonte, sofiasaura, Sohail Quadir, sokrates49, DaveH, Sophia Pomrening, Megan Spencer, spottysueleeds, ssh, star_drop, Imani Samuel, wesley webb, suburbanastronomer, christian feldt, szmytke, t_townshend, tadaemdg, tairving, Lora Vatalaro, Sebastian Kiernan, Alfredo, Taylor Durrer, taylorjane, tazwolf, Terry Crozier, tenfyr, terah34, Rachelle Wood, tgong, thamesave, Catherine Fortin, the0retical, Kristin Maling, theeruditefrog, theo_hoogerhuis, theralphs, willichavez, Tony Howden, timbertom1957, tinkapuppy, Tabatha Jo Ewart, Tomasz Kielar, Travis Morales, tnadge, Tomas Kindahl, Tom Bickle, Dr. Thomas Knoblauch, Tony Hartmann, treebeard236, treeve, trevor_allen_faller, triccare, trippyskippy, troyski, trvlcam17, tumquat, TUSHAR SHARMA, tylerfh, Uli Scheuss, Paul Lamey, Ueli Weilenmann, S Uzel, sylvain escoffier, vanderfb, vclifford, Juliana Vega, velthove, veronika.kapanova, Victor Custodio, Ville Seppänen, vodkapip, B. D. Simmons, jimothy, wallec, wandeclayt, wayne_inx300, wdromanski, webbly, wgoltz, williamaskew, Bailey Williams, winddancing, Maryann McNally, windy6786, wingeat, wyatt korth, Rafael Wolfgang Baur Cemin, wwench, xochitl montes, xsara, Стефан Стоянов, Yasar Hasan Khalili, Yasmin A. H. Walter, Yew Hoe, Delperdange Yoann, zarisi, zarkzervo, Zachary Brown, Zeck, zeroalbedo, Pavel Gavrilenko, zorrobis, Niek Goudswaard, zulfe

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Results from the Andromeda Project

The Local Group Cluster Search continues work that began six years ago with the now-completed Andromeda Project. The Andromeda Project analyzed Hubble Space Telescope images of the Andromeda Galaxy (Messier 31) that were obtained as part of the Panchromatic Hubble Andromeda Treasury (PHAT) survey. Volunteers contributed 1.82 million image classifications, leading to the identification of 2753 star clusters. The resulting catalog represents an unprecedented census of star clusters, providing a sample that is currently unmatched in terms of mass completeness and age precision.

Image Credit: NASA, ESA, J. Dalcanton, B.F. Williams, and L.C. Johnson (University of Washington), the PHAT team, and R. Gendler; Johnson et al. 2015

The star cluster catalog was published in the Astrophysical Journal (Johnson et al. 2015), and this cluster sample enabled important research on a range of topics:

• Star Cluster Formation Efficiency (Johnson et al. 2016): <10% of stars in the Andromeda Galaxy form in long-lived star clusters.
• The Star Cluster Mass Function and Limits on the Formation of Massive Star Clusters (Johnson et al. 2017): The mass distribution of star clusters in the Andromeda Galaxy follows a power-law distribution, where there are many more low-mass clusters compared to high-mass clusters. In addition, the maximum cluster mass among a population of newly-formed star clusters depends on the level of star formation activity in the galaxy, such that the most massive clusters only form in galaxies with high star formation rate surface densities.
• The High-mass Stellar Initial Mass Function (Weisz et al. 2015): The mass distribution of massive stars formed in Andromeda's star clusters is measured systematically and is shown to follow a power-law distribution, consistent with the mass distribution measured for stars in our own Milky Way galaxy.