Results 131 to 140 of about 235,164 (217)

Optical polarimetry studies of Seyfert galaxies [PDF]

, 1999
Optical imaging polarimetry has been performed on seven nearby Seyfert galaxies, three with face-on and four with edge-on host galaxies of various morphological classifications.
Felton, Michelle Ann
core  

A Splashback-like Feature of Central Galaxies in Galaxy Clusters

The Astrophysical Journal
We investigate a splashback-like feature in the outer region of central galaxies (CGs) in clusters. This feature is detected as a “dip” in the radial slope of the CG surface brightness, derived through the stacking of Dark Energy Survey data of over 4000
Yuanyuan Zhang, Susmita Adhikari, Louise O. V. Edwards, Jesse B. Golden-Marx, Ricardo L. C. Ogando, Eli S. Rykoff   +5 more
doaj   +1 more source

Outer Ionized Gas in Galaxy Group: Exchance Through Tidal Interaction or Accretion from Common Reservoirs?

Universe
To clarify the problem of outer cold gas accretion onto disk galaxies, we performed the panoramic spectroscopy of six compact galaxy groups to search for intergalactic gas flows.
Olga Sil’chenko, Alexei Moiseev, Alexandrina Smirnova, Yael Kosareva, Dmitry Oparin   +4 more
doaj   +1 more source

Enhanced Star Formation and Black Hole Accretion Rates in Galaxy Mergers in IllustrisTNG50

The Astrophysical Journal
Many theoretical and observational studies have suggested that galaxy mergers may trigger enhanced star formation or active galactic nucleus activity.
Aimee L. Schechter, Shy Genel, Bryan Terrazas, Julia M. Comerford, Abigail Hartley, Rachel S. Somerville, Rebecca Nevin, Joseph Simon, Erica Nelson   +8 more
doaj   +1 more source

Isothermal Bondi Accretion in Jaffe and Hernquist Galaxies with a Central Black Hole: Fully Analytical Solutions

, 2017
One of the most active fields of research of modern-day astrophysics is that of massive black hole formation and coevolution with the host galaxy.
L. Ciotti, Silvia Pellegrini, S. Pellegrini, Luca Ciotti   +3 more
core   +1 more source

FAST Reveals the Extended H i Halo and Accretion Signatures of NGC 2683

The Astrophysical Journal
We present the results of our recent H i observations conducted on the edge-on galaxy NGC 2683 using the Five-hundred-meter Aperture Spherical radio Telescope (FAST).
Qian Jiao, Ming Zhu, Bernd Vollmer, Mei Ai, Haiyang Yu, Qinghua Tan, Cheng Cheng, Yang Gao   +7 more
doaj   +1 more source

Stellar Mergers or Truly Young? Intermediate-age Stars on Highly Radial Orbits in the Milky Way’s Stellar Halo

The Astrophysical Journal
Reconstructing the mass assembly history of the Milky Way relies on obtaining detailed measurements of the properties of many stars in the galaxy, especially in the stellar halo.
Danny Horta, Yuxi (Lucy) Lu, Melissa K. Ness, Mariangela Lisanti, Adrian M. Price-Whelan   +4 more
doaj   +1 more source

Active galactic nucleus activity in brightest cluster galaxies at intermediate redshifts in Sunyaev-Zel’dovich–selected clusters

Astronomy & Astrophysics
Context. Brightest cluster galaxies (BCGs) host some of the most powerful active galactic nuclei (AGNs) and play a central role in regulating the heating–cooling balance of the intracluster medium.
Hatamkhani N., Skelton R. E., Delhaize J., Hilton M., Loubser S. I., Gupta N., Mogotsi K. M.   +6 more
doaj   +1 more source

Preferential Accretion in the Supermassive Black Holes of Milky Way-size Galaxies Due to Direct Feeding by Satellites

, 2018
International audienceUsing a new, high-resolution cosmological hydrodynamic simulation of a Milky Way-type (MW-type) galaxy, we explore how a merger-rich assembly history affects the mass budget of the central supermassive black hole (SMBH).
Marta Volonteri, N. Nicole Sanchez, Governato, Fabio, Fabio Governato, James Wadsley, Quinn, Tom, Kelly Holley-Bockelmann, Brooks, Alyson, Holley-Bockelmann, Kelly, Tremmel, Michael, Alyson Brooks, Tom Quinn, Bellovary, Jillian M., Wadsley, James, Jillian M. Bellovary, Sanchez, N. Nicole, Michael Tremmel, Volonteri, Marta   +17 more
core   +1 more source

How Does Feedback Affect the Star Formation Histories of Galaxies?

The Astrophysical Journal
Star formation in galaxies is regulated by the interplay of a range of processes that shape the multiphase gas in the interstellar and circumgalactic media.
Kartheik G. Iyer, Tjitske K. Starkenburg, Greg L. Bryan, Rachel S. Somerville, Juan Pablo Alfonzo, Daniel Anglés-Alcázar, Suchetha Cooray, Romeel Davé, Austen Gabrielpillai, Shy Genel, Sultan Hassan, Lars Hernquist, Christian Kragh Jespersen, Christopher C. Lovell, Boon Kiat Oh, Camilla Pacifici, Lucia A. Perez, Laura Sommovigo, Joshua S. Speagle, Sandro Tacchella, Megan T. Tillman, Francisco Villaescusa-Navarro, John F. Wu   +22 more
doaj   +1 more source