Results 1 to 10 of about 12,694,826 (399)

A Fast Radio Burst in a Compact Galaxy Group at z ∼ 1 [PDF]

The Astrophysical Journal Letters, 2023
FRB 20220610A is a high-redshift fast radio burst (FRB) that has not been observed to repeat. Here, we present rest-frame UV and optical Hubble Space Telescope observations of the field of FRB 20220610A. The imaging reveals seven extended sources, one of
Alexa C. Gordon, Wen-fai Fong, Sunil Simha, Yuxin Dong, Charles D. Kilpatrick, Adam T. Deller, Stuart D. Ryder, Tarraneh Eftekhari, Marcin Glowacki, Lachlan Marnoch, August R. Muller, Anya E. Nugent, Antonella Palmese, J. Xavier Prochaska, Marc Rafelski, Ryan M. Shannon, Nicolas Tejos   +16 more
doaj   +2 more sources

Galaxy interactions II: High density environments [PDF]

, 2011
With the aim to assess the role of dense environments in galaxy interactions, properties we present an analysis of close galaxy pairs in groups and clusters, obtained from the Sloan Digital Sky Survey Data Release 7 (SDSS-DR7). We identified pairs that reside in groups by cross-correlating the total galaxy pair catalogue with the SDSS-DR7 group ...
Abazajian, Abazajian, Alonso, Alonso, Alonso, Baldry, Baldry, Balogh, Balogh, Balogh, Barton, Berlind, Blanton, Brinchmann, Ceccarelli, Colless, Cooper, Cooper, Coziol, D. G. Lambas, Darg, De Lucia, Dressler, Ellison, González, González, Gunn, Heiderman, Hopkins, Hopkins, Huchra, Kauffmann, Kennicutt, Lacerna, Lambas, Lambas, Lin, Mamon, Mamon, McIntosh, Merchán, Michel-Dansac, Morgan, N. Padilla, Padilla, Padilla, Padilla, Park, Patton, Pérez, Robaina, S. Alonso, Simard, Skibba, Skibba, Strauss, V. Mesa, von der Linden, Wang, Wong, Yang, York, Zapata, Zibetti, Zwicky   +64 more
arxiv   +4 more sources

Evolution of galaxy groups in the Illustris simulation [PDF]

, 2016
We present the first study of evolution of galaxy groups in the Illustris simulation. We focus on dynamically relaxed and unrelaxed galaxy groups representing dynamically evolved and evolving galaxy systems, respectively. The evolutionary state of a group is probed from its luminosity gap and separation between the brightest group galaxy and the center
Dariush, Ali A., Khosroshahi, Habib G., Raouf, Mojtaba   +2 more
arxiv   +3 more sources

Pre-Processing and Post-Processing in Group-Cluster Mergers [PDF]

, 2013
Galaxies in clusters are more likely to be of early type and to have lower star formation rates than galaxies in the field. Recent observations and simulations suggest that cluster galaxies may be `pre-processed' by group or filament environments and that galaxies that fall into a cluster as part of a larger group can stay coherent within the cluster ...
Ricker, Paul M., Vijayaraghavan, Rukmani
arxiv   +4 more sources

Galaxy groups in the 2dF redshift survey: Galaxy Spectral Type Segregation in Groups [PDF]

Mon.Not.Roy.Astron.Soc. 335 (2002) 825, 2002
The behaviour of the relative fraction of galaxies with different spectral types in groups is analysed as a function of projected local galaxy density and the group-centric distance. The group sample was taken from the 2dF Group Galaxy Calatogue constructed by Merch\'an & Zandivarez.
Diego G. Lambas, A. A. Zandivarez, M. E. Merchán, H. J. Martínez, Hernán Muriel, Mariano Dominguez   +5 more
arxiv   +6 more sources

A New Look at Poor Groups of Galaxies [PDF]

arXiv, 1999
We use a new fiber spectroscopic survey of 12 nearby, poor groups of galaxies to examine the dynamics and evolution of galaxies in these common, but poorly studied, environments. Some of our conclusions are: (1) The nine groups in our sample with diffuse X-ray emission are in fact bound systems with at least 20-50 group members with absolute magnitudes
Ann I. Zabludoff
arxiv   +3 more sources

Magnification by Galaxy Group Dark Matter Halos [PDF]

, 2012
We report on the detection of gravitational lensing magnification by a population of galaxy groups, at a significance level of 4.9 sigma. Using X-ray selected groups in the COSMOS 1.64 deg^2 field, and high-redshift Lyman break galaxies as sources, we ...
Alexie Leauthaud, Alexis Finoguenov, Capak, George, George, Hendrik Hildebrandt, Hildebrandt, Huff, Jason Rhodes, Jes Ford, Kerscher, Larson, Leauthaud, Ludovic Van Waerbeke, Masayuki Tanaka, Matthew R. George, Muñoz-Cuartas, Navarro, Ouchi, Peter Capak, Rozo, Sawicki, Schmidt, Scranton, Umetsu, Van Waerbeke, Wright   +26 more
core   +5 more sources

Galaxy Group at z=0.3 Associated with the Damped Lyman Alpha System Towards Quasar Q1127-145 [PDF]

, 2009
(Abridged) We performed a spectroscopic galaxy survey, complete to m0.15L_B* at z=0.3), within 100x100" of the quasar Q1127-145 (z=1.18).
Barton, Bechtold, Bergeron, Bergeron, Bertin, Bouché, Bouché, Bowen, Burkert, Carilli, Chelouche, Chen, Chen, Chen, Chengalur, Christopher W. Churchill, Chun, Churchill, Churchill, Churchill, Churchill, Churchill, Churchill, Chynoweth, Curran, Dekker, Ellison, Erb, Faber, Fraternali, Glenn G. Kacprzak, Guillemin, Haehnelt, Heckman, Heckman, Holweger, Kacprzak, Kacprzak, Kacprzak, Kanekar, Kanekar, Kanekar, Kaufmann, Kewley, Kewley, Kim, Kinney, Knierman, Kobulnicky, Kulkarni, Lacy, Lane, Le Brun, Lin, Lopez, Maller, Matteucci, Michael T. Murphy, Mo, Mulchaey, Møller, Narayanan, Narayanan, Nestor, Nestor, Padilla, Pettini, Pollack, Prochaska, Prochaska, Prochaska, Puche, Rand, Rao, Rao, Rao, Rigby, Rubin, Sancisi, Siemiginowska, Siemiginowska, Spolaor, Steidel, Steidel, Steidel, Swaters, Tinker, Tremonti, Turnshek, Weiner, Whiting, Wolfe, Wolfe, Wolfire, York, Zabludoff, Zibetti, Zwaan   +97 more
core   +3 more sources

Mapping Extragalactic Dark Matter Annihilation with Galaxy Surveys: A Systematic Study of Stacked Group Searches [PDF]

, 2018
Dark matter in the halos surrounding galaxy groups and clusters can annihilate to high-energy photons. Recent advancements in the construction of galaxy group catalogs provide many thousands of potential extragalactic targets for dark matter.
Lisanti, Mariangela, Mishra-Sharma, Siddharth, Rodd, Nicholas L., Safdi, Benjamin R., Wechsler, Risa H.   +4 more
core   +4 more sources

Molecular Property Diagnostic Suite for COVID-19 (MPDSCOVID-19): an open-source disease-specific drug discovery portal [PDF]

GigaByte
Molecular Property Diagnostic Suite (MPDS) was conceived and developed as an open-source disease-specific web portal based on Galaxy. MPDSCOVID-19 was developed for COVID-19 as a one-stop solution for drug discovery research.
Lipsa Priyadarsinee , Esther Jamir , Selvaraman Nagamani , Hridoy Jyoti Mahanta , Nandan Kumar , Lijo John , Himakshi Sarma , Asheesh Kumar , Anamika Singh Gaur , Rosaleen Sahoo , S. Vaikundamani , N. Arul Murugan , U. Deva Priyakumar , G. P. S. Raghava , Prasad V. Bharatam , Ramakrishnan Parthasarathi , V. Subramanian , G. Madhavi Sastry , G. Narahari Sastry   +18 more
doaj   +2 more sources