Zobrazeno 1 - 10
of 1 661
pro vyhledávání: '"irregular [galaxies]"'
Autor:
Tikhonov, N. A.1 ntik@sao.ru
Publikováno v:
Astrophysical Bulletin. Jan2018, Vol. 73 Issue 1, p22-34. 13p.
Publikováno v:
Galaxies, Vol 12, Iss 4, p 42 (2024)
Polar ring galaxies (PRGs) are unusual relative to common galaxies in that they consist of a central host galaxy—usually a gas-poor, early-type S0 or elliptical galaxy—surrounded by a ring of gas, dust and stars that orbit perpendicular to the ma
Externí odkaz:
https://doaj.org/article/c4fffff00e784bfcb5e6719a8f405e11
Autor:
Michael G. Jones, David J. Sand, Burçin Mutlu-Pakdil, Catherine E. Fielder, Denija Crnojević, Paul Bennet, Kristine Spekkens, Richard Donnerstein, Amandine Doliva-Dolinsky, Ananthan Karunakaran, Jay Strader, Dennis Zaritsky
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 2, p L37 (2024)
We report the discovery of Corvus A, a low-mass, gas-rich galaxy at a distance of approximately 3.5 Mpc, identified in DR10 of the Dark Energy Camera Legacy Imaging Survey during the initial phase of our ongoing SEmi-Automated Machine LEarning Search
Externí odkaz:
https://doaj.org/article/90ddd07ce7df48e3aed843eb9fd7d47e
Autor:
Vaidehi S. Paliya, D. J. Saikia
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 2, p L26 (2024)
The astrophysical γ -ray photons carry the signatures of the violent phenomena happening on various astronomical scales in our Universe. This includes supernova remnants, pulsars, and pulsar wind nebulae in the Galactic environment and extragalactic
Externí odkaz:
https://doaj.org/article/3ff39aa7f1954eeeb71f8528a1cdb268
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 2, p L25 (2024)
Cosmic metals are believed to originate from stellar and supernovae (SNe) nucleosynthesis, dispersed into the interstellar medium (ISM) through stellar winds and supernova explosions. In this paper, we present the clear evidence of metal enrichment b
Externí odkaz:
https://doaj.org/article/e2e67061f8d442fb98a481b9ef67850a
Autor:
Patra, N.1 narendra@ncra.tifr.res.in, Chengalur, J.1 chengalu@ncra.tifr.res.in, Karachentsev, I.2 ikar@sao.ru, Sharina, M.2
Publikováno v:
Astrophysical Bulletin. Oct2016, Vol. 71 Issue 4, p408-421. 14p.
Autor:
Erin Kado-Fong, Marla Geha, Yao-Yuan Mao, Mithi A. C. de los Reyes, Risa H. Wechsler, Yasmeen Asali, Nitya Kallivayalil, Ethan O. Nadler, Erik J. Tollerud, Benjamin Weiner
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 129 (2024)
Measuring the relation between star formation and galactic winds is observationally difficult. In this work we make an indirect measurement of the mass-loading factor (the ratio between the mass outflow rate and star formation rate) in low-mass galax
Externí odkaz:
https://doaj.org/article/02f7f1d6cdbf4b5480e41b959c60806c
Autor:
Maren Cosens, Shelley A. Wright, Karin Sandstrom, Lee Armus, Norman Murray, Jordan N. Runco, Sanchit Sabhlok, James Wiley
Publikováno v:
The Astronomical Journal, Vol 168, Iss 6, p 250 (2024)
Measurements of oxygen abundance throughout galaxies provide insight to the formation histories and ongoing processes. Here we present a study of the gas-phase oxygen abundance in the H ii regions and diffuse gas of the nearby starburst dwarf galaxy,
Externí odkaz:
https://doaj.org/article/3166e6339083496cb8bb6403c5a69bc9
Autor:
Alec S. Hirschauer, Nicolas Crouzet, Nolan Habel, Laura Lenkić, Conor Nally, Olivia C. Jones, Giacomo Bortolini, Martha L. Boyer, Kay Justtanont, Margaret Meixner, Göran Östlin, Gillian S. Wright, Ruyman Azzollini, Joris A. D. L. Blommaert, Bernhard Brandl, Leen Decin, Omnarayani Nayak, Pierre Royer, B. A. Sargent, Paul van der Werf
Publikováno v:
The Astronomical Journal, Vol 168, Iss 1, p 23 (2024)
We present a JWST imaging survey of I Zw 18, the archetypal extremely metal-poor, star-forming (SF), blue compact dwarf galaxy. With an oxygen abundance of only ∼3% Z _⊙ , it is among the lowest-metallicity systems known in the local Universe, an
Externí odkaz:
https://doaj.org/article/9e2728617aec4dfc8557fc0ee93a8fa7
Autor:
Lena Komarova, M. S. Oey, Svea Hernandez, Angela Adamo, Mattia Sirressi, Claus Leitherer, J. M. Mas-Hesse, Göran Östlin, Edmund Hodges-Kluck, Arjan Bik, Matthew J. Hayes, Anne E. Jaskot, Daniel Kunth, Peter Laursen, Jens Melinder, T. Emil Rivera-Thorsen
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 117 (2024)
As the nearest confirmed Lyman continuum (LyC) emitter, Haro 11 is an exceptional laboratory for studying LyC escape processes crucial to cosmic reionization. Our new Hubble Space Telescope/Cosmic Origins Spectrograph G130M/1055 observations of its t
Externí odkaz:
https://doaj.org/article/926f63f6ff0a4bd0a5ea2a9d4b1e68c3