Zobrazeno 1 - 10
of 326
pro vyhledávání: '"Tidal tails"'
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 299 (2024)
The most massive early-type galaxies (ETGs) are known to form through numerous galaxy mergers. Thus, it is intriguing to study whether their formation in low-density environments, where nearby companions are almost absent, is associated with mergers,
Externí odkaz:
https://doaj.org/article/d0fc77c4770544ab92bfaa30012918ae
Autor:
Benjamin N. Velguth, Eric F. Bell, Adam Smercina, Paul Price, Katya Gozman, Antonela Monachesi, Richard D’Souza, Jeremy Bailin, Roelof S. de Jong, In Sung Jang, Colin T. Slater
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 189 (2024)
Mergers of and interactions between galaxies imprint a wide diversity of morphological, dynamical, and chemical characteristics in stellar halos and tidal streams. Measuring these characteristics elucidates aspects of the progenitors of the galaxies
Externí odkaz:
https://doaj.org/article/b6fea78803174f2e9ae9d9b02b558441
Autor:
Pavel Kroupa, Jan Pflamm-Altenburg, Sergij Mazurenko, Wenjie Wu, Ingo Thies, Vikrant Jadhav, Tereza Jerabkova
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 94 (2024)
Stars that evaporate from their star cluster by the energy equipartition process end up in either a leading or a trailing tidal tail. In Newtonian gravitation and for open star clusters in the solar vicinity, the tidal threshold, or práh, for escape
Externí odkaz:
https://doaj.org/article/f33e3a1147e04b75bf490ff6bf8c4712
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 55 (2024)
Stellar streams are sensitive tracers of the gravitational potential, which is typically assumed to be static in the inner Galaxy. However, massive mergers like Gaia-Sausage-Enceladus can impart torques on the stellar disk of the Milky Way that resul
Externí odkaz:
https://doaj.org/article/9229498cb3424a5ea6d550a8605f0607
Publikováno v:
The Astrophysical Journal, Vol 965, Iss 2, p 158 (2024)
To enhance our understanding of the impact of galaxy mergers on the kinematics of early-type galaxies (ETGs), we examine differences in specific stellar angular momentum within the half-light radius ( ${\lambda }_{{R}_{e}}$ ) among ETGs with differen
Externí odkaz:
https://doaj.org/article/285417749e0e4929ac5c8717a2df3dae
Autor:
Erin Kado-Fong, Azia Robinson, Kristina Nyland, Jenny E. Greene, Katherine A. Suess, Sabrina Stierwalt, Rachael Beaton
Publikováno v:
The Astrophysical Journal, Vol 963, Iss 1, p 37 (2024)
It is exceedingly rare to find quiescent low-mass galaxies in the field at low redshift. UGC 5205 is an example of such a quenched field dwarf ( M _⋆ ∼ 3 × 10 ^8 M _⊙ ). Despite a wealth of cold gas ( M _HI ∼ 3.5 × 10 ^8 M _⊙ ) and UV emi
Externí odkaz:
https://doaj.org/article/d0c0dc74a5b043a39ac40314892937a9
Autor:
Fumiya Maeda, Fumi Egusa, Akiyoshi Tsujita, Shuhei Inoue, Kotaro Kohno, Shinya Komugi, Kouji Ohta, Yoshihisa Asada, Yusuke Fujimoto, Asao Habe, Bunyo Hatsukade, Shin Inoue, Hiroyuki Kaneko, Masato I. N. Kobayashi, Tomoka Tosaki
Publikováno v:
The Astrophysical Journal, Vol 962, Iss 1, p 4 (2024)
The tip of the tidal tail, resulting from an encounter between galaxies, features gas concentrations and some star-forming regions, such as tidal dwarf galaxies (TDGs). This region provides a unique laboratory for examining the star formation process
Externí odkaz:
https://doaj.org/article/2da0bfca7b3f48dabee71f82dd6daa41
Autor:
Catherine E. Fielder, Michael G. Jones, David J. Sand, Paul Bennet, Denija Crnojević, Ananthan Karunakaran, Burçin Mutlu-Pakdil, Kristine Spekkens
Publikováno v:
The Astrophysical Journal Letters, Vol 954, Iss 2, p L39 (2023)
We investigate the ultradiffuse galaxy (UDG) UGC 9050-Dw1, which was selected because of its disturbed morphology as part of a larger sample of UDGs that display evidence for significant interactions. We use the Hubble Space Telescope’s Advanced Ca
Externí odkaz:
https://doaj.org/article/2b41429fb4454882af9a4e6ea6aa218f
Autor:
Sapozhnikov Sergei, Kovaleva Dana
Publikováno v:
Open Astronomy, Vol 30, Iss 1, Pp 191-202 (2021)
We introduce the application of the clustering algorithm to the preliminary compiled list of probable wide pairs of co-moving stars. The main aim of such development is a possibility of unsupervised blind search of coeval loose stellar structures ove
Externí odkaz:
https://doaj.org/article/a437ae5257b74cb798afb8dcf3b7829a
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 2, p 195 (2023)
The positions and velocities of stellar streams have been used to constrain the mass and shape of the Milky Way's dark matter halo. Several extragalactic streams have already been detected, though it has remained unclear what can be inferred about th
Externí odkaz:
https://doaj.org/article/95acf0dfce9443068eadd35e87c8ab19