Zobrazeno 1 - 10
of 268
pro vyhledávání: '"Andrew E. Dolphin"'
Autor:
Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Michelle L. M. Collins, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, Andrew E. Dolphin, Nicolas Longeard, Mario L. Mateo, Francisco J. Mercado, Nathan R. Sandford, Evan D. Skillman
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 2 (2024)
We present ∼300 stellar metallicity measurements in two faint M31 dwarf galaxies, Andromeda XVI ( M _V = −7.5) and Andromeda XXVIII ( M _V = –8.8), derived using metallicity-sensitive calcium H and K narrowband Hubble Space Telescope imaging. T
Externí odkaz:
https://doaj.org/article/f94c675453d84e2e8dacaf2092a9e26d
Autor:
Martha L. Boyer, Giada Pastorelli, Léo Girardi, Paola Marigo, Andrew E. Dolphin, Kristen B. W. McQuinn, Max J. B. Newman, Alessandro Savino, Daniel R. Weisz, Benjamin F. Williams, Jay Anderson, Roger E. Cohen, Matteo Correnti, Andrew A. Cole, Marla C. Geha, Mario Gennaro, Nitya Kallivayalil, Evan N. Kirby, Karin M. Sandstrom, Evan D. Skillman, Christopher T. Garling, Hannah Richstein, Jack T. Warfield
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 120 (2024)
We present an investigation of evolved stars in the nearby star-forming galaxy Wolf–Lundmark–Melotte (WLM), using Near-Infrared Camera (NIRCam) imaging from the JWST Resolved Stellar Populations Early Release Science program. We find that various
Externí odkaz:
https://doaj.org/article/e05f4897baa8481c9b32317aadea2450
Autor:
Alessandro Savino, Mario Gennaro, Andrew E. Dolphin, Daniel R. Weisz, Matteo Correnti, Jay Anderson, Rachael Beaton, Martha L. Boyer, Roger E. Cohen, Andrew A. Cole, Meredith J. Durbin, Christopher T. Garling, Marla C. Geha, Karoline M. Gilbert, Jason Kalirai, Nitya Kallivayalil, Kristen B. W. McQuinn, Max J. B. Newman, Hannah Richstein, Evan D. Skillman, Jack T. Warfield, Benjamin F. Williams
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 36 (2024)
We empirically assess estimates from v3.0 of the James Webb Space Telescope NIRCam Exposure Time Calculator (ETC) using observations of resolved stars in Local Group targets taken as part of the Resolved Stellar Populations Early Relea
Externí odkaz:
https://doaj.org/article/c1fa5c027ef745f9a76b3698b06f5c0e
Autor:
Kristen. B. W. McQuinn, Yao-Yuan Mao, Erik J. Tollerud, Roger E. Cohen, David Shih, Matthew R. Buckley, Andrew E. Dolphin
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 161 (2024)
We report the discovery of two ultrafaint dwarf galaxies, Leo M and Leo K, that lie outside the halo of the Milky Way (MW). Using Hubble Space Telescope imaging of the resolved stars, we create color–magnitude diagrams reaching the oldest main-sequ
Externí odkaz:
https://doaj.org/article/a04c740a116f4155900c8eb8fa213cc7
Autor:
Max J. B. Newman, Kristen B. W. McQuinn, Evan D. Skillman, Martha L. Boyer, Roger E. Cohen, Andrew E. Dolphin, O. Grace Telford
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 175 (2024)
The tip of the red giant branch (TRGB) based distance method in the I band is one of the most efficient and precise techniques for measuring distances to nearby galaxies ( D ≲ 15 Mpc). The TRGB in the near-infrared (NIR) is 1–2 mag brighter relat
Externí odkaz:
https://doaj.org/article/74c79d4ba00b4c1ca73589348e8ce015
Autor:
Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Francisco J. Mercado, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, Andrew E. Dolphin, Nicolas Longeard, Mario L. Mateo, Jenna Samuel, Nathan R. Sandford
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 1, p 36 (2024)
We measure the metallicities of 374 red giant branch (RGB) stars in the isolated, quenched dwarf galaxy Tucana using Hubble Space Telescope narrowband (F395N) calcium H and K imaging. Our sample is a factor of ∼7 larger than what is available from
Externí odkaz:
https://doaj.org/article/63df93428e0a441985a4eee144307732
Autor:
Daniel R. Weisz, Andrew E. Dolphin, Alessandro Savino, Kristen B. W. McQuinn, Max J. B. Newman, Benjamin F. Williams, Nitya Kallivayalil, Jay Anderson, Martha L. Boyer, Matteo Correnti, Marla C. Geha, Karin M. Sandstrom, Andrew A. Cole, Jack T. Warfield, Evan D. Skillman, Roger E. Cohen, Rachael Beaton, Alessandro Bressan, Alberto Bolatto, Michael Boylan-Kolchin, Alyson M. Brooks, James S. Bullock, Charlie Conroy, Michael C. Cooper, Julianne J. Dalcanton, Aaron L. Dotter, Tobias K. Fritz, Christopher T. Garling, Mario Gennaro, Karoline M. Gilbert, Leo Girardi, Benjamin D. Johnson, L. Clifton Johnson, Jason Kalirai, Evan N. Kirby, Dustin Lang, Paola Marigo, Hannah Richstein, Edward F. Schlafly, Erik J. Tollerud, Andrew Wetzel
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 271, Iss 2, p 47 (2024)
We present NIRCam and NIRISS modules for DOLPHOT, a widely used crowded-field stellar photometry package. We describe details of the modules including pixel masking, astrometric alignment, star finding, photometry, catalog creation, and artificial st
Externí odkaz:
https://doaj.org/article/c2942cef14c8474da98e78e9ba5f8bf7
Autor:
Kristen. B. W. McQuinn, Max J. B. Newman, Alessandro Savino, Andrew E. Dolphin, Daniel R. Weisz, Benjamin F. Williams, Martha L. Boyer, Roger E. Cohen, Matteo Correnti, Andrew A. Cole, Marla C. Geha, Mario Gennaro, Nitya Kallivayalil, Karin M. Sandstrom, Evan D. Skillman, Jay Anderson, Alberto Bolatto, Michael Boylan-Kolchin, Christopher T. Garling, Karoline M. Gilbert, Léo Girardi, Jason S. Kalirai, Alessandro Mazzi, Giada Pastorelli, Hannah Richstein, Jack T. Warfield
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 16 (2024)
We present the first star formation history (SFH) and age–metallicity relation (AMR) derived from resolved stellar populations imaged with the JWST NIRCam instrument. The target is the Local Group star-forming galaxy WLM at 970 kpc. The depth of th
Externí odkaz:
https://doaj.org/article/dfa91b9ef5ab4d4f8277954633ac7c7b
Autor:
Sal Wanying Fu, Daniel R. Weisz, Else Starkenburg, Nicolas Martin, Alessandro Savino, Michael Boylan-Kolchin, Patrick Côté, Andrew E. Dolphin, Alexander P. Ji, Nicolas Longeard, Mario L. Mateo, Ekta Patel, Nathan R. Sandford
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 2, p 167 (2023)
We present uniformly measured stellar metallicities of 463 stars in 13 Milky Way (MW) ultra-faint dwarf galaxies (UFDs; M _V = −7.1 to −0.8) using narrowband CaHK (F395N) imaging taken with the Hubble Space Telescope. This represents the largest
Externí odkaz:
https://doaj.org/article/f9b56c7f0f864cd88b4367c9f29f0267
Autor:
Benjamin F. Williams, Meredith Durbin, Dustin Lang, Julianne J. Dalcanton, Andrew E. Dolphin, Adam Smercina, Petia Yanchulova Merica-Jones, Daniel R. Weisz, Eric F. Bell, Karoline M. Gilbert, Léo Girardi, Karl Gordon, Puragra Guhathakurta, L. Clifton Johnson, Tod R. Lauer, Anil Seth, Evan Skillman
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 268, Iss 2, p 48 (2023)
We present the final legacy version of stellar photometry for the Panchromatic Hubble Andromeda Treasury (PHAT) survey. We have reprocessed all of the Hubble Space Telescope Wide Field Camera 3 and Advanced Camera for Surveys near-ultraviolet (F275W,
Externí odkaz:
https://doaj.org/article/27665fadf59b4635b421525bfc2ae60b