Zobrazeno 1 - 10
of 9 384
pro vyhledávání: '"Local group"'
Autor:
Abdollahi, Hedieh1 Abdollahi.hedieh2013@gmail.com, Javadi, Atefeh2, Taghi Mirtorabi, Mohammad1, Saremi, Elham2,3,4, Khosroshahi, Habib2, van Loon, Jacco Th.5, McDonald, Iain6,7, Khalouei, Elahe2, Aghdam, Sima T.2, Saberi, Maryam8
Publikováno v:
Proceedings of the International Astronomical Union. 6/9/2023, Vol. 17 Issue S373, p242-245. 4p.
Akademický článek
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Autor:
Michael H. Siegel, Caryl Gronwall
Publikováno v:
Universe, Vol 10, Iss 8, p 330 (2024)
In this review, we highlight the contributions made by the Swift/UVOT instrument to the understanding of the ultraviolet (UV) attenuation and extinction properties of interstellar dust and provide insight into hot stars and young stellar populations.
Externí odkaz:
https://doaj.org/article/537dc53e6d5c4c04b6f922d9fa9db44d
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:
L. R. Cullinane, Karoline M. Gilbert, Ivanna Escala, J. Leigh Wojno, Evan N. Kirby, Kateryna A. Kvasova, Erik Tollerud, Michelle L. M. Collins, R. Michael Rich
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 133 (2024)
With a luminosity similar to that of Milky Way dwarf spheroidal systems like Sextans, but a spatial extent similar to that of ultra-diffuse galaxies, Andromeda (And) XIX is an unusual satellite of M31. To investigate the origin of this galaxy, we mea
Externí odkaz:
https://doaj.org/article/84ca5411acc642eda254f5e41c81cb66
Autor:
Jinsu Rhee, Sukyoung K. Yi, Jongwan Ko, Emanuele Contini, J. K. Jang, Seyoung Jeon, San Han, Christophe Pichon, Yohan Dubois, Katarina Kraljic, Sébastien Peirani
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 111 (2024)
We study star formation (SF) quenching of satellite galaxies with M _* > 10 ^7 M _⊙ within two low-mass groups ( M _vir = 10 ^12.9 and 10 ^12.7 M _⊙ ) using the NewHorizon simulation. We confirm that satellite galaxies ( M _* ≲ 10 ^10 M _⊙ )
Externí odkaz:
https://doaj.org/article/2a7013ba747646d39ff1736f34b68a0f
Autor:
Paul Bennet, Ekta Patel, Sangmo Tony Sohn, Andrés del Pino Molina, Roeland P. van der Marel, Mattia Libralato, Laura L. Watkins, Antonio Aparicio, Gurtina Besla, Carme Gallart, Mark A. Fardal, Matteo Monelli, Elena Sacchi, Erik Tollerud, Daniel R. Weisz
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 98 (2024)
We have determined the proper motions (PMs) of 12 dwarf galaxies in the Local Group (LG), ranging from the outer Milky Way (MW) halo to the edge of the LG. We used the Hubble Space Telescope (HST) as the first and Gaia as the second epoch using the G
Externí odkaz:
https://doaj.org/article/94aa8ef67f184997ae2d546936fb9d49
Autor:
Itsuki Ogami, Yutaka Komiyama, Masashi Chiba, Mikito Tanaka, Puragra Guhathakurta, Evan N. Kirby, Rosemary F. G. Wyse, Carrie Filion, Takanobu Kirihara, Miho N. Ishigaki, Kohei Hayashi
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 107 (2024)
We analyze the outer regions of M33, beyond 15 kpc in projected distance from its center, using Subaru/Hyper Suprime-Cam multicolor imaging. We identify red giant branch (RGB) stars and red clump (RC) stars using the surface-gravity-sensitive NB515 f
Externí odkaz:
https://doaj.org/article/438a99fcbe224c05bd762c59f366fac6
Autor:
Tobin M. Wainer, Benjamin F. Williams, L. Clifton Johnson, Daniel R. Weisz, Julianne J. Dalcanton, Anil C. Seth, Andrew Dolphin, Meredith J. Durbin, Eric F. Bell, Zhuo Chen, Puragra Guhathakurta, Eric W. Koch, Christina W. Lindberg, Erik Rosolowsky, Karin M. Sandstrom, Evan D. Skillman, Adam Smercina, Estephani E. TorresVillanueva
Publikováno v:
The Astronomical Journal, Vol 168, Iss 2, p 86 (2024)
We measure the high-mass stellar initial mass function (IMF) from resolved stars in M33 young stellar clusters. Leveraging the Hubble Space Telescope’s high resolving power, we fully model the IMF probabilistically. We first model the optical color
Externí odkaz:
https://doaj.org/article/b50d27320dc149f7a53d1e48a54825cb
Autor:
Yutaka Hirai, Evan N. Kirby, Masashi Chiba, Kohei Hayashi, Borja Anguiano, Takayuki R. Saitoh, Miho N. Ishigaki, Timothy C. Beers
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 105 (2024)
The chemical abundances of Milky Way’s (MW's) satellites reflect their star formation histories (SFHs), yet, due to the difficulty of determining the ages of old stars, the SFHs of most satellites are poorly measured. Ongoing and upcoming surveys w
Externí odkaz:
https://doaj.org/article/b834e425161a4551863e4d31d34c6cd2