Zobrazeno 1 - 10
of 402
pro vyhledávání: '"L. Beaton"'
Autor:
Alexander P. Ji, Sanjana Curtis, Nicholas Storm, Vedant Chandra, Kevin C. Schlaufman, Keivan G. Stassun, Alexander Heger, Marco Pignatari, Adrian M. Price-Whelan, Maria Bergemann, Guy S. Stringfellow, Carla Fröhlich, Henrique Reggiani, Erika M. Holmbeck, Jamie Tayar, Shivani P. Shah, Emily J. Griffith, Chervin F. P. Laporte, Andrew R. Casey, Keith Hawkins, Danny Horta, William Cerny, Pierre Thibodeaux, Sam A. Usman, João A. S. Amarante, Rachael L. Beaton, Phillip A. Cargile, Cristina Chiappini, Charlie Conroy, Jennifer A. Johnson, Juna A. Kollmeier, Haining Li, Sarah Loebman, Georges Meynet, Dmitry Bizyaev, Joel R. Brownstein, Pramod Gupta, Sean Morrison, Kaike Pan, Solange V. Ramirez, Hans-Walter Rix, José Sánchez-Gallego
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 2, p L41 (2024)
Stars that formed with an initial mass of over 50 M _⊙ are very rare today, but they are thought to be more common in the early Universe. The fates of those early, metal-poor, massive stars are highly uncertain. Most are expected to directly collap
Externí odkaz:
https://doaj.org/article/cb019f1a53ca4e8bbf8ef53fff9533f7
Autor:
Sten Hasselquist, Christian R. Hayes, Emily J. Griffith, David Weinberg, Tawny Sit, Rachael L. Beaton, Danny Horta
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 227 (2024)
The “two-process model” is a promising technique for interpreting stellar chemical abundance data from large-scale surveys (e.g., the Sloan Digital Sky Survey IV/V and the Galactic Archeology with HERMES survey), enabling more quantitative empiri
Externí odkaz:
https://doaj.org/article/f79e8650c8344f99b618ac0c108f8374
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 180 (2024)
Andromeda XVIII is an isolated dwarf galaxy 579 kpc away from the nearest large galaxy, M31. It is a candidate “backsplash galaxy” that might have been affected by a close passage to M31. We present new Keck/DEIMOS spectroscopy of Andromeda XVIII
Externí odkaz:
https://doaj.org/article/1e5a57907c6246138f34e218d76c9c3d
Autor:
Abigail J. Lee, Andrew J. Monson, Wendy L. Freedman, Barry F. Madore, Kayla A. Owens, Rachael L. Beaton, Coral Espinoza, Tongtian Ren, Yi Ren
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 1, p 22 (2024)
We present near-infrared JHK photometry for the resolved stellar populations in 13 nearby galaxies: NGC 6822, IC 1613, NGC 3109, Sextans B, Sextans A, NGC 300, NGC 55, NGC 7793, NGC 247, NGC 5253, Cen A, NGC 1313, and M83, acquired from the 6.5 m Baa
Externí odkaz:
https://doaj.org/article/2567cdc6e55b4add8900cc4b5061787c
Autor:
Jack T. Warfield, Joel C. Zinn, Jessica Schonhut-Stasik, James W. Johnson, Marc H. Pinsonneault, Jennifer A. Johnson, Dennis Stello, Rachael L. Beaton, Yvonne Elsworth, Rafael A. García, Savita Mathur, Benoît Mosser, Aldo Serenelli, Jamie Tayar
Publikováno v:
The Astronomical Journal, Vol 167, Iss 5, p 208 (2024)
We present stellar age determinations for 4661 red giant branch stars in the APO-K2 catalog, derived using mass estimates from K2 asteroseismology from the K2 Galactic Archaeology Program and elemental abundances from the Apache Point Galactic Evolut
Externí odkaz:
https://doaj.org/article/512bce4a5d1a42a48eb7f268ce6b845d
Autor:
Zachary R. Claytor, Jennifer L. van Saders, Lyra Cao, Marc H. Pinsonneault, Johanna Teske, Rachael L. Beaton
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 47 (2024)
The Transiting Exoplanet Survey Satellite (TESS) mission delivers time-series photometry for millions of stars across the sky, offering a probe into stellar astrophysics, including rotation, on a population scale. However, light-curve systematics rel
Externí odkaz:
https://doaj.org/article/f051ece80176451a8a73943b2c96057a
Autor:
Jessica Schonhut-Stasik, Joel C. Zinn, Keivan G. Stassun, Marc Pinsonneault, Jennifer A. Johnson, Jack T. Warfield, Dennis Stello, Yvonne Elsworth, Rafael A. García, Savita Mathur, Benoit Mosser, Marc Hon, Jamie Tayar, Guy S. Stringfellow, Rachael L. Beaton, Henrik Jönsson, Dante Minniti
Publikováno v:
The Astronomical Journal, Vol 167, Iss 2, p 50 (2024)
We present a catalog of fundamental stellar properties for ∼7500 evolved stars, including stellar radii and masses, determined from the combination of spectroscopic observations from the Apache Point Observatory Galactic Evolution Experiment, part
Externí odkaz:
https://doaj.org/article/668574a57da84183a0cce3bed9b20edb
Publikováno v:
The Astronomical Journal, Vol 166, Iss 6, p 236 (2023)
Near-infrared bandpasses on spaceborne observatories diverge from their ground-based counterparts as they are free of atmospheric telluric absorption. Available transformations between respective filter systems in the literature rely on theoretical s
Externí odkaz:
https://doaj.org/article/74f3bd84b47b47979867ff914288f82d
Autor:
Julie Imig, Cathryn Price, Jon A. Holtzman, Alexander Stone-Martinez, Steven R. Majewski, David H. Weinberg, Jennifer A. Johnson, Carlos Allende Prieto, Rachael L. Beaton, Timothy C. Beers, Dmitry Bizyaev, Michael R. Blanton, Joel R. Brownstein, Katia Cunha, José G. Fernández-Trincado, Diane K. Feuillet, Sten Hasselquist, Christian R. Hayes, Henrik Jönsson, Richard R. Lane, Jianhui Lian, Szabolcs Mészáros, David L. Nidever, Annie C. Robin, Matthew Shetrone, Verne Smith, John C. Wilson
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 124 (2023)
We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), α -element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observatory
Externí odkaz:
https://doaj.org/article/372a9bd65ffb4b6bb837d6786f2d6015
Autor:
J. Leigh Wojno, Karoline M. Gilbert, Evan N. Kirby, Ivanna Escala, Puragra Guhathakurta, Rachael L. Beaton, Jason Kalirai, Masashi Chiba, Steven R. Majewski
Publikováno v:
The Astrophysical Journal, Vol 951, Iss 1, p 12 (2023)
We present spectroscopic chemical abundances of red giant branch stars in Andromeda (M31), using medium-resolution ( R ∼ 6000) spectra obtained via the Spectroscopic and Photometric Landscape of Andromeda’s Stellar Halo survey. In addition to ind
Externí odkaz:
https://doaj.org/article/4df998deb2bc41ad91538f78358fe893