Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Andrew Dolphin"'
Autor:
Adam G. Riess, Gagandeep S. Anand, Wenlong Yuan, Stefano Casertano, Andrew Dolphin, Lucas M. Macri, Louise Breuval, Dan Scolnic, Marshall Perrin, Richard I. Anderson
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 1, p L17 (2024)
We present high-definition observations with the James Webb Space Telescope (JWST) of >1000 Cepheids in a geometric anchor of the distance ladder, NGC 4258, and in five hosts of eight Type Ia supernovae, a far greater sample than previous studies wit
Externí odkaz:
https://doaj.org/article/ebfc6fa6fc164a82807bbd8f03dc4a59
Autor:
Gagandeep S. Anand, Adam G. Riess, Wenlong Yuan, Rachael Beaton, Stefano Casertano, Siyang Li, Dmitry I. Makarov, Lidia N. Makarova, R. Brent Tully, Richard I. Anderson, Louise Breuval, Andrew Dolphin, Igor D. Karachentsev, Lucas M. Macri, Daniel Scolnic
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 89 (2024)
The tip of the red giant branch (TRGB) allows for the measurement of precise and accurate distances to nearby galaxies based on the brightest ascent of low-mass red giant branch stars before they undergo the helium flash. With the advent of JWST, the
Externí odkaz:
https://doaj.org/article/a989c69edb59439dbda800c074abf208
Autor:
Adam G. Riess, Gagandeep S. Anand, Wenlong Yuan, Stefano Casertano, Andrew Dolphin, Lucas M. Macri, Louise Breuval, Dan Scolnic, Marshall Perrin, Richard I. Anderson
Publikováno v:
The Astrophysical Journal Letters, Vol 956, Iss 1, p L18 (2023)
High-resolution James Webb Space Telescope (JWST) observations can test confusion-limited Hubble Space Telescope (HST) observations for a photometric bias that could affect extragalactic Cepheids and the determination of the Hubble constant. We prese
Externí odkaz:
https://doaj.org/article/3ebdb0262ab8471787e6ab125de7762b
Autor:
K. Azalee Bostroem, Emmanouil Zapartas, Brad Koplitz, Benjamin F. Williams, Debby Tran, Andrew Dolphin
Publikováno v:
The Astronomical Journal, Vol 166, Iss 6, p 255 (2023)
Current population synthesis modeling suggests that 30%–50% of Type II supernovae originate from binary progenitors; however, the identification of a binary progenitor is challenging. One indicator of a binary progenitor is that the surrounding ste
Externí odkaz:
https://doaj.org/article/f389be9be13a4ffcb395b89a091022e9
Autor:
Adam Smercina, Julianne J. Dalcanton, Benjamin F. Williams, Meredith J. Durbin, Margaret Lazzarini, Eric F. Bell, Yumi Choi, Andrew Dolphin, Karoline Gilbert, Puragra Guhathakurta, Eric W. Koch, Amanda C. N. Quirk, Hans-Walter Rix, Erik Rosolowsky, Anil Seth, Evan Skillman, Daniel R. Weisz
Publikováno v:
The Astrophysical Journal, Vol 957, Iss 1, p 3 (2023)
We present a detailed analysis of the structure of the Local Group flocculent spiral galaxy M33, as measured using the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region (PHATTER) survey. Leveraging the multiwavelength coverage of PHAT
Externí odkaz:
https://doaj.org/article/996ac5beb87c49be83b18a04c3a5bf59
Autor:
Alessandro Savino, Daniel R. Weisz, Evan D. Skillman, Andrew Dolphin, Andrew A. Cole, Nitya Kallivayalil, Andrew Wetzel, Jay Anderson, Gurtina Besla, Michael Boylan-Kolchin, Thomas M. Brown, James S. Bullock, Michelle L. M. Collins, M. C. Cooper, Alis J. Deason, Aaron L. Dotter, Mark Fardal, Annette M. N. Ferguson, Tobias K. Fritz, Marla C. Geha, Karoline M. Gilbert, Puragra Guhathakurta, Rodrigo Ibata, Michael J. Irwin, Myoungwon Jeon, Evan N. Kirby, Geraint F. Lewis, Dougal Mackey, Steven R. Majewski, Nicolas Martin, Alan McConnachie, Ekta Patel, R. Michael Rich, Joshua D. Simon, Sangmo Tony Sohn, Erik J. Tollerud, Roeland P. van der Marel
Publikováno v:
The Astrophysical Journal, Vol 956, Iss 2, p 86 (2023)
We present the lifetime star formation histories (SFHs) for six ultrafaint dwarf (UFD; M _V > − 7.0, $4.9\lt {\mathrm{log}}_{10}({M}_{* }(z=0)/{M}_{\odot })\lt 5.5$ ) satellite galaxies of M31 based on deep color–magnitude diagrams constructed fr
Externí odkaz:
https://doaj.org/article/efdc31fc14f44af8aab3dadcb900d2b4
Autor:
Debby Tran, Benjamin Williams, Emily Levesque, Margaret Lazzarini, Julianne Dalcanton, Andrew Dolphin, Brad Koplitz, Adam Smercina, O. Grace Telford
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 211 (2023)
The nearby face-on star-forming spiral galaxy NGC 6946 is known as the Fireworks Galaxy due to its hosting an unusually large number of supernovae. We analyze its resolved near-ultraviolet stellar photometry measured from images taken with the Hubble
Externí odkaz:
https://doaj.org/article/9ee09b1b59e749f79a0cf47c89eb88c8
Autor:
Brad Koplitz, Jared Johnson, Benjamin F. Williams, Mariangelly Díaz-Rodríguez, Jeremiah W. Murphy, Margaret Lazzarini, Joseph Guzman, Julianne J. Dalcanton, Andrew Dolphin, Meredith Durbin
Publikováno v:
The Astrophysical Journal, Vol 949, Iss 1, p 32 (2023)
Using resolved optical stellar photometry from the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region survey, we measured the star formation history near the position of 85 supernova remnants (SNRs) in M33. We constrained the progenito
Externí odkaz:
https://doaj.org/article/b4b0d69d696c49e194495f030e8ba395
Autor:
Jared R. Johnson, Brad Koplitz, Benjamin F. Williams, Julianne J. Dalcanton, Andrew Dolphin, Léo Girardi
Publikováno v:
The Astrophysical Journal, Vol 945, Iss 2, p 108 (2023)
We have combined resolved stellar photometry from Hubble Space Telescope (HST), Spitzer, and Gaia to identify red supergiant (RSG) candidates in NGC 6946, based on their colors, proper motions, visual morphologies, and spectral energy distributions.
Externí odkaz:
https://doaj.org/article/863463a4f90348d4b76f22a5d00c1090
Autor:
Michelle L M Collins, Benjamin F Williams, Erik J Tollerud, Eduardo Balbinot, Karoline M Gilbert, Andrew Dolphin
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 517(3), 4382-4388. Oxford University Press
We present deep imaging of the ultra-diffuse Andromeda XIX dwarf galaxy from the Advance Camera for Surveys on the Hubble Space Telescope which resolves its stellar populations to below the oldest main sequence turn-off. We derive a full star formati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99df056a2cd709dea5495cb7fd7425ad
http://arxiv.org/abs/2209.12912
http://arxiv.org/abs/2209.12912