Results 71 to 80 of about 24,234 (169)

Formation of the Dark Matter–Deficient S0 Galaxy NGC 4111 under the Tidal Interactions

The Astrophysical Journal Letters
We present high-sensitivity and large-scale atomic hydrogen (H i ) observations toward lenticular (S0) galaxy NGC 4111 using the Five-hundred-meter Aperture Spherical Radio Telescope.
Mei Ai, Ming Zhu, Nai-ping Yu, Jin-long Xu, Xiao-lan Liu, Yingjie Jing, Qian Jiao, Yao Liu, Chuan-peng Zhang, Jie Wang, Peng Jiang   +10 more
doaj   +1 more source

Galaxy groups in the presence of cosmological constant: Increasing the masses of groups

Physics Letters B
The boundaries of galaxy groups and clusters are defined by the interplay between the Newtonian attractive force and the decoupling from the local expansion of the Universe.
David Benisty, Moshe M. Chaichian, Anca Tureanu   +2 more
doaj   +1 more source

Encounters between M33 and Present-day M31 Satellites Hint at a Previous Group Accretion

The Astrophysical Journal
This work investigates whether two known Andromeda (M31) satellites, Pisces (LGS 3) and Andromeda XVI (And XVI), have interacted with M33, M31’s most massive satellite.
Ekta Patel, Paul Bennet, Sangmo Tony Sohn, Mark A. Fardal, Roeland P. van der Marel   +4 more
doaj   +1 more source

The Environment Of Galaxies And Groups Of Galaxies [PDF]

In this thesis, we employ two numerical tools - semi-\ud analytical models and N-body plus hydrodynamical simulations of large scale structure and individual galaxies - to explore the underlying physics governing the formation and evolution of groups of galaxies, and the role of environment in generating polar structures around disk galaxies.\ud \ud ...
openaire  

Scylla. II. The Spatially Resolved Star Formation History of the Large Magellanic Cloud Reveals an Inverted Radial Age Gradient

The Astrophysical Journal
The proximity of the Magellanic Clouds provides the opportunity to study interacting dwarf galaxies near a massive host, and spatial trends in their stellar population properties in particular, with a unique level of detail.
Roger E. Cohen, Kristen B. W. McQuinn, Claire E. Murray, Benjamin F. Williams, Yumi Choi, Christina W. Lindberg, Clare Burhenne, Karl D. Gordon, Petia Yanchulova Merica-Jones, Karoline M. Gilbert, Martha L. Boyer, Steven Goldman, Andrew E. Dolphin, O. Grace Telford   +13 more
doaj   +1 more source

HST Proper Motion of Andromeda III. Another Satellite Coorbiting the M31 Satellite Plane

The Astrophysical Journal
We measure the absolute proper motion of Andromeda III (And III) using Advanced Camera for Surveys/Wide Field Channel and WFPC2 exposures spanning an unprecedented 22 yr time baseline.
Dana I. Casetti-Dinescu, Marcel S. Pawlowski, Terrence M. Girard, Kosuke Jamie Kanehisa, Alexander Petroski, Max Martone, Vera Kozhurina-Platais, Imants Platais   +7 more
doaj   +1 more source

Probing the Environment around GW170817 with DESI: Insights on Galaxy Group Peculiar Velocities for Standard Siren Measurements

The Astrophysical Journal
We present a new measurement of the Hubble constant, H _0 , following the gravitational-wave event GW170817 and Dark Energy Spectroscopic Instrument (DESI) observations.
A. J. Amsellem, A. Palmese, K. Douglass, C. Howlett, J. S. M. Karp, I. Magaña Hernandez, J. Moustakas, R. H. Wechsler, J. Aguilar, S. Ahlen, S. BenZvi, D. Bianchi, D. Brooks, A. Carr, T. Claybaugh, A. Cuceu, T. M. Davis, A. de la Macorra, A. Dey, B. Dey, P. Doel, A. Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, K. Honscheid, M. Ishak, R. Joyce, R. Kehoe, T. Kisner, A. Kremin, O. Lahav, A. Lambert, M. Landriau, L. Le Guillou, M. Manera, V. Manwadkar, A. Meisner, R. Miquel, A. D. Myers, S. Nadathur, G. Niz, N. Palanque-Delabrouille, W. J. Percival, C. Poppett, F. Prada, I. Pérez-Ràfols, A. Raichoor, G. Rossi, E. Sanchez, D. Schlegel, M. Schubnell, H. Seo, J. Silber, D. Sprayberry, G. Tarlé, R. Zhou, THE DESI COLLABORATION   +58 more
doaj   +1 more source

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

The Astrophysical Journal Letters
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   +1 more source

A Comprehensive Study of Morphology and Kinematics in Extended Nebulae Around UV-luminous Quasars at z ≈ 1

The Astrophysical Journal
Gas flows between galaxies and the circumgalactic medium (CGM) play a central role in galaxy evolution and can become observable as giant nebulae when illuminated by quasars. We present an ensemble study of nebulae around 30 UV-luminous quasars at z  ≈ 0.
Zhuoqi (Will) Liu, Sean D. Johnson, Eric F. Bell, Zhijie Qu, Benoît Epinat, Hsiao-Wen Chen, Marc Rafelski, Jennifer I-Hsiu Li, Alexander Beckett, Mandy C. Chen, Sayak Dutta, David DePalma, Gwen C. Rudie, Joop Schaye, Patrick Petitjean, Sebastiano Cantalupo, Elise Fuller, Wolfram Kollatschny, Sebastián López, Nishant Mishra, Sowgat Muzahid, Andrea Travascio, Fakhri S. Zahedy   +22 more
doaj   +1 more source

Groups of Galaxies [PDF]

Proceedings of Baryons in Dark Matter Halos — PoS(BDMH2004), 2004
openaire   +2 more sources