Results 121 to 130 of about 76,004 (221)

The Response of Warm Absorbers to the Variations in the Ionizing Continuum in the Active Galaxy NGC 4051

The Astrophysical Journal
We present a time-resolved X-ray spectral analysis of the warm absorbers in the Seyfert galaxy NGC 4051, which has an active galactic nucleus (AGN), using observations from the Neutron Star Interior Composition Explorer (NICER).
Dev R. Sadaula, Timothy R. Kallman, Sibasish Laha   +2 more
doaj   +1 more source

Search for High-excitation Emission Lines from a Quasar-scale Active Nucleus in Arp 220

The Astrophysical Journal
The late-stage galaxy merger and prototypical ultraluminous infrared galaxy (ULIRG) Arp 220 is probed using the JWST Mid Infrared Instrument medium-resolution spectrometer to search for multiple diagnostic active galactic nuclei (AGN) emission lines in ...
Charles E. Goldberg, Victorine A. Buiten, George H. Rieke, Almudena Alonso-Herrero, A. Paggi, Paul van der Werf, Meredith A. Stone, Jane E. Morrison, Stacey Alberts, Dan Dicken, Gillian Wright   +10 more
doaj   +1 more source

An Increase in the Prevalence of Ionized Outflows in Galaxies with Coronal Line Emission: Feedback in Action?

The Astrophysical Journal
Coronal lines (CLs), which arise from collisionally excited forbidden transitions from highly ionized species, are a powerful diagnostic tool in uncovering active galactic nuclei (AGNs) and constraining their properties.
William Matzko, Shobita Satyapal, Michael Reefe, Jeffrey McKaig, Remington O. Sexton, Sara Doan   +5 more
doaj   +1 more source

Evolution of the M∗–MBH Relation from z ∼ 6 to the Present Epoch

The Astrophysical Journal
The ratio between the stellar mass of a galaxy, M _* , and that of its central supermassive black hole (SMBH), M _• , the “Magorrian” relationship, traces their coevolution.
Yang Sun, George H. Rieke, Jianwei Lyu, Meredith A. Stone, Zhiyuan Ji, Pierluigi Rinaldi, Christopher N. A. Willmer, Yongda Zhu   +7 more
doaj   +1 more source

Velocity Structure Correlations between the Nebular, Molecular, and Atmospheric Gases in the Cores of Four Cool Core Clusters

The Astrophysical Journal
We investigate the velocity structure of nebular gas in the central galaxies of four clusters: A1835, PKS 0745−191, A262, and RXJ0820.9+0752, using data from the Keck Cosmic Web Imager. Velocity structure functions (VSFs) of the [O ii ] emission line are
Muzi Li, B.R. McNamara, Alison L. Coil, Marie-Joëlle Gingras, Fabrizio Brighenti, H.R. Russell, Prathamesh D. Tamhaneh, S. Peng Oh, Serena Perrotta   +8 more
doaj   +1 more source

Mapping the Active Galactic Nucleus Effects on the Stellar and Gas Properties of NGC 5806

The Astrophysical Journal
It is commonly accepted that active galactic nuclei (AGNs) have a strong impact upon the evolution of their host galaxies, but the processes by which they do so are not fully understood.
Sophie L. Robbins, Sandra I. Raimundo, Matthew A. Malkan   +2 more
doaj   +1 more source

The Low-mass and Structured Stellar Halo of M83 Argues Against a Merger Origin for Its Starburst and Extended Neutral Hydrogen Disk

The Astrophysical Journal
A merger origin has been suggested for M83’s massive, metal-rich extended H i disk and nuclear starburst. We observe M83’s stellar halo to test this idea.
Eric F. Bell, Benjamin Harmsen, Matthew Cosby, Paul A. Price, Sarah Pearson, Antonela Monachesi, Roelof S. de Jong, Richard D’ Souza, Katya Gozman, Jacob Nibauer, Michael P. Busch, Jeremy Bailin, Benne W. Holwerda, In Sung Jang, Adam Smercina   +14 more
doaj   +1 more source

Here Be SDRAGNs—Spiral Galaxies Hosting Large Double Radio Sources

The Astronomical Journal
We present a sample of large double radio sources hosted by spiral galaxies (spiral double radio active galactic nuclei, SDRAGNs). Candidates were initially selected through the Radio Galaxy Zoo project and subsequently refined using Sloan Digital Sky ...
Jean Tate, William C. Keel, Michael O’Keeffe, O. Ivy Wong, Heinz Andernach, Julie K. Banfield, Alexei Moiseev, Aleksandrina Smirnova, Arina Arshinova, Eugene Malygin, Elena Shablovinskaya, Roman Uklein, Stanislav Shabala, Ray Norris, Brooke D. Simmons, Rebecca Smethurst, Ivan Terentev, Chris Molloy, Victor Linares   +18 more
doaj   +1 more source

The nuclei of bulge-less galaxies

, 2004
Als Beitrag zur Vervollst?andigung unseres Wissens ?uber Galaxienzentren wurde die Zentral-Region sehr sp?ater (bulge-loser) Spiralgalaxien untersucht.
openaire   +2 more sources

Correction: High-content screening (HCS) workflows for FAIR image data management with OMERO. [PDF]

Sci Rep
Massei R, Busch W, Serrano-Solano B, Bernt M, Scholz S, Nicolay EK, Bohring H, Bumberger J.   +7 more
europepmc   +1 more source