TY - JOUR
T1 - The PHANGS-HST-Hα Survey
T2 - Warm Ionized Gas Physics at High Angular Resolution in Nearby Galaxies with the Hubble Space Telescope
AU - Chandar, Rupali
AU - Barnes, Ashley T.
AU - Thilker, David A.
AU - Caputo, Miranda
AU - Floyd, Matthew R.
AU - Leroy, Adam K.
AU - Úbeda, Leonardo
AU - Lee, Janice C.
AU - Boquien, Médéric
AU - Maschmann, Daniel
AU - Belfiore, Francesco
AU - Kreckel, Kathryn
AU - Glover, Simon C.O.
AU - Klessen, Ralf S.
AU - Groves, Brent
AU - Dale, Daniel A.
AU - Schinnerer, Eva
AU - Emsellem, Eric
AU - Rosolowsky, Erik
AU - Bigiel, Frank
AU - Blanc, Guillermo
AU - Chevance, Mélanie
AU - Congiu, Enrico
AU - Egorov, Oleg V.
AU - Faesi, Chris
AU - Grasha, Kathryn
AU - Hannon, Stephen
AU - Larson, Kirsten L.
AU - Lopez, Laura A.
AU - Mok, Angus
AU - Neumann, Justus
AU - Ostriker, Eve
AU - Razza, Alessandro
AU - Sánchez-Blázquez, Patricia
AU - Santoro, Francesco
AU - Schruba, Andreas
AU - Sun, Jiayi
AU - Usero, Antonio
AU - Watkins, E.
AU - Whitmore, Bradley C.
AU - Williams, Thomas G.
N1 - Publisher Copyright:
© 2025. The Author(s). Published by the American Astronomical Society.
PY - 2025/3/3
Y1 - 2025/3/3
N2 - The PHANGS project is assembling a comprehensive, multiwavelength data set of nearby (∼5-20 Mpc), massive star-forming galaxies to enable multiphase, multiscale investigations into the processes that drive star formation and galaxy evolution. To date, large survey programs have provided molecular gas (CO) cubes with the Atacama Large Millimeter/submillimeter Array, optical integral field unit (IFU) spectroscopy with the Very Large Telescope/Multi-Unit Spectroscopic Explorer (MUSE), high-resolution near-ultraviolet-optical imaging in five broadband filters with Hubble Space Telescope (HST), and infrared imaging in NIRCAM+MIRI filters with JWST. Here we present PHANGS-HST-Hα, which has obtained high-resolution (∼2-10 pc), narrowband imaging in the F658N or F657N filters with the HST/WFC3 camera of the warm ionized gas in the first 19 nearby galaxies observed in common by all four of the PHANGS large programs. We summarize our data reduction process, with a detailed discussion of the production of flux-calibrated, Milky Way extinction-corrected, continuum-subtracted Hα maps. PHANGS-MUSE IFU spectroscopy data are used to background-subtract the HST-Hα maps and to determine the [N ii] correction factors for each galaxy. We describe our public data products (the data released as part of this work include the reduced drizzled narrowband images and the flux-calibrated, continuum-subtracted Hα maps for each galaxy; these images are available for download via MAST at https://archive.stsci.edu/hlsp/phangs.html, as well as at the Canadian Astronomy Data Centre as part of the PHANGS archive at https://www.canfar.net/storage/vault/list/phangs/RELEASES) and highlight a few key science cases enabled by the PHANGS-HST-Hα observations.
AB - The PHANGS project is assembling a comprehensive, multiwavelength data set of nearby (∼5-20 Mpc), massive star-forming galaxies to enable multiphase, multiscale investigations into the processes that drive star formation and galaxy evolution. To date, large survey programs have provided molecular gas (CO) cubes with the Atacama Large Millimeter/submillimeter Array, optical integral field unit (IFU) spectroscopy with the Very Large Telescope/Multi-Unit Spectroscopic Explorer (MUSE), high-resolution near-ultraviolet-optical imaging in five broadband filters with Hubble Space Telescope (HST), and infrared imaging in NIRCAM+MIRI filters with JWST. Here we present PHANGS-HST-Hα, which has obtained high-resolution (∼2-10 pc), narrowband imaging in the F658N or F657N filters with the HST/WFC3 camera of the warm ionized gas in the first 19 nearby galaxies observed in common by all four of the PHANGS large programs. We summarize our data reduction process, with a detailed discussion of the production of flux-calibrated, Milky Way extinction-corrected, continuum-subtracted Hα maps. PHANGS-MUSE IFU spectroscopy data are used to background-subtract the HST-Hα maps and to determine the [N ii] correction factors for each galaxy. We describe our public data products (the data released as part of this work include the reduced drizzled narrowband images and the flux-calibrated, continuum-subtracted Hα maps for each galaxy; these images are available for download via MAST at https://archive.stsci.edu/hlsp/phangs.html, as well as at the Canadian Astronomy Data Centre as part of the PHANGS archive at https://www.canfar.net/storage/vault/list/phangs/RELEASES) and highlight a few key science cases enabled by the PHANGS-HST-Hα observations.
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U2 - 10.3847/1538-3881/adaa80
DO - 10.3847/1538-3881/adaa80
M3 - Article
AN - SCOPUS:105002590580
SN - 0004-6256
VL - 169
JO - Astronomical Journal
JF - Astronomical Journal
IS - 3
M1 - 150
ER -