Results 121 to 130 of about 77,751 (271)

Circumnuclear Dust in Luminous Early-type Galaxies. I. Sample Properties and Stellar Luminosity Models

The Astrophysical Journal
Dusty circumnuclear disks (CNDs) in luminous early-type galaxies (ETGs) show regular, dynamically cold molecular gas kinematics. For a growing number of ETGs, Atacama Large Millimeter/sub-millimeter Array (ALMA) CO imaging and detailed gas-dynamical ...
Jared R. Davidson, Benjamin D. Boizelle, Jonelle L. Walsh, Aaron J. Barth, Emma Rasmussen, Andrew J. Baker, David A. Buote, Jeremy Darling, Luis C. Ho, Kyle M. Kabasares, Jonathan H. Cohn   +10 more
doaj   +1 more source

What Powers the Compact Radio Emission in Nearby Elliptical and S0 Galaxies?

, 1998
Many nearby early-type (elliptical and S0) galaxies contain weak (milli-Jansky level) nuclear radio sources on scales a few hundred parsecs or less. The origin of the radio emission, however, has remained unclear, especially in volume-limited samples ...
Akritas M. G., de Bruyn A. G., Ekers R. D., Fanaroff B. L., Heckman T. M., Heeschen D. S., Hine R. G., Hummel E., Luis C. Ho, Rawlings S., Sadler E. M., Sadler E. M., Slee O. B.   +12 more
core   +1 more source

On the relative contribution of high-redshift galaxies and active galactic nuclei to reionization [PDF]

, 2012
Fabio Fontanot, Stefano Cristiani, Eros Vanzella   +2 more
openalex   +1 more source

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

Peculiar nuclei and their relation to galaxy type [PDF]

, 1978
Timothy M. Heckman
openalex   +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

Radial Transport of Molecular Gas to the Nuclei of Spiral Galaxies [PDF]

, 1999
Kazushi Sakamoto, S. K. Okumura, S. Ishizuki, N. Z. Scoville   +3 more
openalex   +1 more source

Active Galactic Nuclei and Galaxy Formation

The Astrophysical Journal, 1997
It is proposed that early jet-induced activity around active galactic nuclei (AGNs) is responsible for triggering large-scale star formation in protogalaxies and results in the formation of giant ellipticals and spheroids in the universe. Specifically, Begelman & Cioffi's model for overpressured cocoons expanding into protogalactic environs yields size
openaire   +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

On the occupation of X-ray-selected galaxy groups by radio active galactic nuclei since z = 1.3 [PDF]

, 2011
V. Smolčić, A. Finoguenov, G. Zamorani, E. Schinnerer, M. Tanaka, S. Giodini, N. Scoville   +6 more
openalex   +1 more source