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The PHANGS-HST Survey: Physics at High Angular Resolution in Nearby Galaxies with the Hubble Space Telescope

Lee, Janice C. and Whitmore, Bradley C. and Thilker, David A. and Deger, Sinan and Larson, Kirsten L. and Ubeda, Leonardo and Anand, Gagandeep S. and Boquien, Médéric and Chandar, Rupali and Dale, Daniel A. and Emsellem, Eric and Leroy, Adam K. and Rosolowsky, Erik and Schinnerer, Eva and Schmidt, Judy and Lilly, James and Turner, Jordan and Van Dyk, Schuyler and White, Richard L. and Barnes, Ashley T. and Belfiore, Francesco and Bigiel, Frank and Blanc, Guillermo A. and Cao, Yixian and Chevance, Mélanie and Congiu, Enrico and Egorov, Oleg V. and Glover, Simon C. O. and Grasha, Kathryn and Groves, Brent and Henshaw, Jonathan D. and Hughes, Annie and Klessen, Ralf S. and Koch, Eric W. and Kreckel, Kathryn and Kruijssen, J. M. Diederik and Liu, Daizhong and Lopez, Laura A. and Mayker, Ness and Meidt, Sharon E. and Murphy, Eric J. and Pan, Hsi-An and Pety, Jérôme and Querejeta, Miguel and Razza, Alessandro and Saito, Toshiki and Sánchez-Blázquez, Patricia and Santoro, Francesco and Sardone, Amy and Scheuermann, Fabian and Schruba, Andreas and Sun, Jiayi and Usero, Antonio and Watkins, E. and Williams, Thomas G. (2022) The PHANGS-HST Survey: Physics at High Angular Resolution in Nearby Galaxies with the Hubble Space Telescope. Astrophysical Journal Supplement Series, 258 (1). Art. No. 10. ISSN 0067-0049. doi:10.3847/1538-4365/ac1fe5.

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The PHANGS program is building the first data set to enable the multiphase, multiscale study of star formation across the nearby spiral galaxy population. This effort is enabled by large survey programs with the Atacama Large Millimeter/submillimeter Array (ALMA), MUSE on the Very Large Telescope, and the Hubble Space Telescope (HST), with which we have obtained CO(2–1) imaging, optical spectroscopic mapping, and high-resolution UV–optical imaging, respectively. Here, we present PHANGS-HST, which has obtained NUV–U–B–V–I imaging of the disks of 38 spiral galaxies at distances of 4–23 Mpc, and parallel V- and I-band imaging of their halos, to provide a census of tens of thousands of compact star clusters and multiscale stellar associations. The combination of HST, ALMA, and VLT/MUSE observations will yield an unprecedented joint catalog of the observed and physical properties of ∼100,000 star clusters, associations, H ii regions, and molecular clouds. With these basic units of star formation, PHANGS will systematically chart the evolutionary cycling between gas and stars across a diversity of galactic environments found in nearby galaxies. We discuss the design of the PHANGS-HST survey and provide an overview of the HST data processing pipeline and first results. We highlight new methods for selecting star cluster candidates, morphological classification of candidates with convolutional neural networks, and identification of stellar associations over a range of physical scales with a watershed algorithm. We describe the cross-observatory imaging, catalogs, and software products to be released. The PHANGS high-level science products will seed a broad range of investigations, in particular, the study of embedded stellar populations and dust with the James Webb Space Telescope, for which a PHANGS Cycle 1 Treasury program to obtain eight-band 2–21 μm imaging has been approved.

Item Type:Article
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URLURL TypeDescription Paper ItemData
Lee, Janice C.0000-0002-2278-9407
Whitmore, Bradley C.0000-0002-3784-7032
Thilker, David A.0000-0002-8528-7340
Deger, Sinan0000-0003-1943-723X
Larson, Kirsten L.0000-0003-3917-6460
Anand, Gagandeep S.0000-0002-5259-2314
Boquien, Médéric0000-0003-0946-6176
Chandar, Rupali0000-0003-0085-4623
Dale, Daniel A.0000-0002-5782-9093
Emsellem, Eric0000-0002-6155-7166
Leroy, Adam K.0000-0002-2545-1700
Rosolowsky, Erik0000-0002-5204-2259
Schinnerer, Eva0000-0002-3933-7677
Schmidt, Judy0000-0002-2617-5517
Turner, Jordan0000-0003-2261-5746
Van Dyk, Schuyler0000-0001-9038-9950
Barnes, Ashley T.0000-0003-0410-4504
Belfiore, Francesco0000-0002-2545-5752
Bigiel, Frank0000-0003-0166-9745
Blanc, Guillermo A.0000-0003-4218-3944
Cao, Yixian0000-0001-5301-1326
Chevance, Mélanie0000-0002-5635-5180
Congiu, Enrico0000-0002-8549-4083
Egorov, Oleg V.0000-0002-4755-118X
Glover, Simon C. O.0000-0001-6708-1317
Grasha, Kathryn0000-0002-3247-5321
Groves, Brent0000-0002-9768-0246
Henshaw, Jonathan D.0000-0001-9656-7682
Hughes, Annie0000-0002-9181-1161
Klessen, Ralf S.0000-0002-0560-3172
Koch, Eric W.0000-0001-9605-780X
Kreckel, Kathryn0000-0001-6551-3091
Kruijssen, J. M. Diederik0000-0002-8804-0212
Liu, Daizhong0000-0001-9773-7479
Lopez, Laura A.0000-0002-1790-3148
Mayker, Ness0000-0002-5993-6685
Meidt, Sharon E.0000-0002-6118-4048
Murphy, Eric J.0000-0001-7089-7325
Pan, Hsi-An0000-0002-1370-6964
Pety, Jérôme0000-0003-3061-6546
Querejeta, Miguel0000-0002-0472-1011
Razza, Alessandro0000-0001-7876-1713
Saito, Toshiki0000-0002-2501-9328
Sánchez-Blázquez, Patricia0000-0003-0651-0098
Santoro, Francesco0000-0002-6363-9851
Sardone, Amy0000-0002-5783-145X
Scheuermann, Fabian0000-0003-2707-4678
Sun, Jiayi0000-0003-0378-4667
Usero, Antonio0000-0003-1242-505X
Watkins, E.0000-0002-7365-5791
Williams, Thomas G.0000-0002-0012-2142
Additional Information:© 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 2021 January 7; revised 2021 July 26; accepted 2021 August 20; published 2022 January 10. Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Science Institute. STScI is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract NAS 5-26555. Support for Program number 15654 was provided through a grant from the STScI under NASA contract NAS5-26555. J.C.L. acknowledges the W.M. Keck Institute for Space Studies (KISS) for its support of PHANGS-HST collaboration meetings where key work for this paper was performed. The PHANGS-HST survey benefited from discussions at the 2014 KISS workshop, "Bridging the Gap: Observations and Theory of Star Formation Meet on Large and Small Scales." J.M.D.K. and M.C. gratefully acknowledge funding from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) through an Emmy Noether Research Group (grant No. KR4801/1-1) and the DFG Sachbeihilfe (grant No. KR4801/2-1) and from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program via the ERC Starting Grant MUSTANG (grant agreement No. 714907). F.B. and A.B. acknowledge funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 726384/Empire). R.S.K. and S.C.O.G. acknowledge financial support from the DFG via the collaborative research center (SFB 881, Project-ID 138713538) "The Milky Way System" (subprojects A1, B1, B2, and B8). They also acknowledge subsidies from the Heidelberg Cluster of Excellence STRUCTURES in the framework of Germany's Excellence Strategy (grant EXC-2181/1-390900948) and funding from the ERC via the ERC Synergy Grant ECOGAL (grant 855130). K.K., O.E., and F.S. gratefully acknowledge funding from the German Research Foundation (DFG) in the form of an Emmy Noether Research Group (grant No. KR4598/2-1, PI Kreckel). E.W. acknowledges support from the DFG via SFB 881 'The Milky Way System' (project-ID 138713538; subproject P2). T.G.W. acknowledges funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 694343). E.R. acknowledges the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), funding reference number RGPIN-2017-03987. This paper makes use of the following ALMA data, which have been processed as part of the PHANGS-ALMA survey: ADS/JAO.ALMA#2012.1.00650.S ADS/JAO.ALMA#2013.1.01161.S ADS/JAO.ALMA#2015.1.00925.S ADS/JAO.ALMA#2015.1.00956.S ADS/JAO.ALMA#2017.1.00886.L. This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with NASA. Software: PyRAF (Science Software Branch at STScI 2012), Astrodrizzle (STSCI Development Team 2012), DOLPHOT (v2.0; Dolphin 2016), Photutils (Bradley et al. 2019), CIGALE (Burgarella et al. 2005; Noll et al. 2009; Boquien et al. 2019).
Group:Infrared Processing and Analysis Center (IPAC), Keck Institute for Space Studies
Funding AgencyGrant Number
NASANAS 5-26555
Keck Institute for Space Studies (KISS)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)KR4801/1-1
Deutsche Forschungsgemeinschaft (DFG)KR4801/2-1
European Research Council (ERC)714907
European Research Council (ERC)726384
Deutsche Forschungsgemeinschaft (DFG)SFB 881
Bundesministerium für Bildung und Forschung (BMBF)EXC-2181/1 - 390900948
European Research Council (ERC)855130
Deutsche Forschungsgemeinschaft (DFG)KR4598/2-1
European Research Council (ERC)694343
Natural Sciences and Engineering Research Council of Canada (NSERC)RGPIN-2017-03987
Subject Keywords:Star formation; Star clusters; Young star clusters; Surveys; Spiral galaxies; Hubble Space Telescope
Issue or Number:1
Classification Code:Unified Astronomy Thesaurus concepts: Star formation (1569); Star clusters (1567); Young star clusters (1833); Surveys (1671); Spiral galaxies (1560); Hubble Space Telescope (761)
Record Number:CaltechAUTHORS:20210309-100144873
Persistent URL:
Official Citation:Janice C. Lee et al 2022 ApJS 258 10
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108360
Deposited By: Tony Diaz
Deposited On:10 Mar 2021 19:55
Last Modified:11 Jan 2022 23:52

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