We construct a catalog of star clusters from Hubble Space Telescope images of the inner disk of the Triangulum Galaxy (M33) using image classifications collected by the Local Group Cluster Search, a citizen science project hosted on the Zooniverse platform. We identify 1214 star clusters within the Hubble Space Telescope imaging footprint of the Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER) survey. Comparing this catalog to existing compilations in the literature, 68% of the clusters are newly identified. The final catalog includes multiband aperture photometry and fits for cluster properties via integrated light spectral energy distribution fitting. The cluster catalog’s 50% completeness limit is ∼1500 M ☉ at an age of 100 Myr, as derived from comprehensive synthetic cluster tests.
|Original language||English (US)|
|State||Published - Oct 1 2022|
Bibliographical noteFunding Information:
We enthusiastically thank the ∼2800 LGCS volunteers who made this work possible. Their contributions are acknowledged individually at https://authors.clustersearch.org . This publication uses data generated via the Zooniverse.org platform, the development of which is funded by generous support, including a Global Impact Award from Google, and by a grant from the Alfred P. Sloan Foundation. Support for this work was provided by NASA through grant number HST-GO-14610 from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS5-26555. L.C.J. acknowledges support through a CIERA Postdoctoral Fellowship at Northwestern University. This material is partially based on work by T.M.W. as a CIERA REU student at Northwestern University, supported by the National Science Foundation under grant No. AST-1757792. Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). This research made use of NASA’s Astrophysics Data System (ADS) bibliographic services.
© 2022. The Author(s). Published by the American Astronomical Society.