Results 31 to 40 of about 24,234 (169)

Galaxy Groups at Intermediate Redshift [PDF]

The Astrophysical Journal, 2001
Galaxy groups likely to be virialized are identified within the CNOC2 intermediate redshift galaxy survey using an iterative method. The number-velocity dispersion relation is in agreement with the low-mass extrapolation of the cluster normalized Press-Schechter function.
Carlberg, R. G., Yee, H. K. C., Morris, S. L., Lin, H., Hall,, P. B., Patton, D. R., Sawicki, M., Shepherd, C. W.   +7 more
openaire   +3 more sources

A group of merging galaxies falling into Abell 2142

Astronomy & Astrophysics
Galaxy clusters produce a very hostile environment for galaxies: their gas gets stripped by ram pressure, they undergo galaxy interactions, and their star formation is quenched.
Anitha Shaji Aashiya, Hallé Anaëlle, Gasymov Damir, Melchior Anne-Laure, Combes Françoise, Cattaneo Andrea   +5 more
doaj   +1 more source

The shape of poor groups of galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2004
7 pages, MNRAS accepted ...
Plionis, M., Basilakos, S., Tovmassian, H.   +2 more
openaire   +2 more sources

Optical observations of M81 galaxy group in narrow band [SII] and Hα filters: Holmberg IX [PDF]

Serbian Astronomical Journal, 2009
We present observations of the nearby tidal dwarf galaxy Holmberg IX in M81 galaxy group in narrow band [SII] and Hα filters, carried out in March and November 2008 with the 2m RCC telescope at NAO Rozhen, Bulgaria.
Arbutina B., Ilić D., Stavrev K., Urošević D., Vukotić B., Onić D.   +5 more
doaj   +1 more source

The Fate of the Milky Way–Andromeda System: To Merge or Not?

The Astrophysical Journal Letters
It has long been predicted that the Milky Way (MW) will eventually merge with Andromeda (M31), a view reinforced by Hubble Space Telescope measurements indicating a small M31 transverse velocity. However, using updated Gaia-based proper motions (PMs) and
Hao Wu, Yang Huang, Huawei Zhang, Guangze Sun, Shi Shao   +4 more
doaj   +1 more source

The JWST Discovery of the Triply Imaged Type Ia “Supernova H0pe” and Observations of the Galaxy Cluster PLCK G165.7+67.0

The Astrophysical Journal
A Type Ia supernova (SN) at z = 1.78 was discovered in James Webb Space Telescope Near Infrared Camera imaging of the galaxy cluster PLCK G165.7+67.0 (G165; z = 0.35).
Brenda L. Frye, Massimo Pascale, Justin Pierel, Wenlei Chen, Nicholas Foo, Reagen Leimbach, Nikhil Garuda, Seth H. Cohen, Patrick S. Kamieneski, Rogier A. Windhorst, Anton M. Koekemoer, Pat Kelly, Jake Summers, Michael Engesser, Daizhong Liu, Lukas J. Furtak, Maria del Carmen Polletta, Kevin C. Harrington, S. P. Willner, Jose M. Diego, Rolf A. Jansen, Dan Coe, Christopher J. Conselice, Liang Dai, Hervé Dole, Jordan C. J. D’Silva, Simon P. Driver, Norman A. Grogin, Madeline A. Marshall, Ashish K. Meena, Mario Nonino, Rafael Ortiz III, Nor Pirzkal, Aaron Robotham, Russell E. Ryan Jr., Lou Strolger, Scott Tompkins, Christopher N. A. Willmer, Haojing Yan, Min S. Yun, Adi Zitrin   +40 more
doaj   +1 more source

Age Estimates for Galaxies in Groups [PDF]

International Astronomical Union Colloquium, 2000
AbstractWe discuss recent developments on the age and metallicity distribution for early type galaxies in different environments.
Forbes, Duncan, Terlevich, Alejandro I.
openaire   +2 more sources

The M31–M33 Interaction: Impact on M31’s Center-of-mass Motion and Satellite Orbits

The Astrophysical Journal
Inspired by recent studies of the interaction between the Milky Way and the Large Magellanic Cloud and its implications for the Milky Way’s global dynamical history, we investigate how the massive satellite galaxy M33 influences the position and velocity
Ekta Patel, Nicolás Garavito-Camargo, Ivanna Escala   +2 more
doaj   +1 more source

The PAndAS View of the Andromeda Satellite System. IV. Global Properties

The Astrophysical Journal, 2023
We build a statistical framework to infer the global properties of the satellite system of the Andromeda galaxy (M31) from the properties of individual dwarf galaxies located in the Pan-Andromeda Archaelogical Survey (PAndAS) and the previously ...
Amandine Doliva-Dolinsky, Nicolas F. Martin, Zhen Yuan, Alessandro Savino, Daniel R. Weisz, Annette M. N. Ferguson, Rodrigo A. Ibata, Stacy Y. Kim, Geraint F. Lewis, Alan W. McConnachie, Guillaume F. Thomas   +10 more
doaj   +1 more source

CSST Large-scale Structure Analysis Pipeline. IV. Cosmic Voids Identified from Galaxy Group Samples as Probes of the Large-scale Structure

The Astrophysical Journal
Because groups are directly associated with halos, they allow for considerably simpler theoretical modeling than approaches based on individual galaxies.
Yingxiao Song, Xiaohu Yang, Yan Gong, Yizhou Gu, Qingyang Li, Hong Guo, Yunkun Han, Yipeng Jing, Cheng Li, Feng Shi, Jipeng Sui, Run Wen, Hu Zhan, Pengjie Zhang, Youcai Zhang, Gong-Bo Zhao, Xian Zhong Zheng, Xingchen Zhou, Hu Zou   +18 more
doaj   +1 more source