Results 111 to 120 of about 113,123 (219)

A Catalog of Broad Hα and Hβ Active Galactic Nuclei in MaNGA

The Astrophysical Journal
Broad H α and H β emission lines (FWHM > 1000 km s ^−1 ) are incredibly efficient tracers of the high-velocity clouds encircling active galactic nuclei (AGNs).
James Negus, Julia M. Comerford, Francisco Müller Sánchez   +2 more
doaj   +1 more source

Constraints on the presence of water megamaser emission in z~2.5 ultraluminous infrared starburst galaxies

, 2009
We present Expanded Very Large Array and Arecibo observations of two lensed submm galaxies at z~2.5, in order to search for redshifted 22.235 GHz water megamaser emission.
Barger, Barvainis, Bertoldi, Carilli, Chapman, Daddi, Daddi, Darling, Downes, Downes, Edmonds, Emmanuel Momjian, Frayer, Gao, Genzel, Hagiwara, Henkel, Jeff Wagg, Menéndez-Delmestre, Motohara, Nakai, Pope, Riechers, Rigby, Sheth, Smail, Smail, Spergel, Vanden Bout, Wagg, Wagg, Wang, Wilner   +32 more
core   +1 more source

Chandra Detects Low-luminosity Active Galactic Nucleus with MBH = 104–106 M⊙ in Nearby (z < 0.5) Dwarf and Star-forming Galaxies

The Astrophysical Journal
We searched the Chandra and XMM archives for 900 Green Pea galaxies to identify signs of active galactic nuclei (AGN). Green peas are low-mass, emission-line galaxies that resemble high-redshift dwarf galaxies. From 29 observations, we detected X-rays in
Mainak Singha, Julissa Sarmiento, Sangeeta Malhotra, James E. Rhoads, L. Y. Aaron Yung, Junxian Wang, Zhen-Ya Zheng, Ruqiu Lin, Keunho Kim, Jialai Kang, Santosh Harish   +10 more
doaj   +1 more source

Probing cosmic voids with emission-line galaxies

Frontiers in Astronomy and Space Sciences
IntroductionWe aim to provide forecasts for future line intensity mapping (LIM) observations and galaxy redshift surveys, focusing on the physical properties of low-density region of the cosmic web (voids).
Yuka Yamada, Naoki Yoshida, Naoki Yoshida   +2 more
doaj   +1 more source

Radio emission in star-forming galaxies: connection to restarted or relic AGN activity

Astronomy & Astrophysics
Increasing evidence shows that active galactic nuclei (AGNs) with radio detections have more perturbed ionized gas kinematics and higher outflow detection rates, suggesting a link between radio emission and these processes.
Albán M., Wylezalek D., Kukreti P., Riffel R. A., Riffel R.   +4 more
doaj   +1 more source

The Kinematics of Morphologically Selected z~2 Galaxies in the GOODS-N Field

, 2004
We present near-IR spectra of H-alpha emission from 13 galaxies at z~2 in the GOODS-N field. The galaxies were selected primarily because they appear to have elongated morphologies, and slits were aligned with the major axes (as determined from the rest ...
Adelberger, Kurt L., Erb, Dawn K., Pettini, Max, Shapley, Alice E., Steidel, Charles C.   +4 more
core   +1 more source

An automated activity classification tool for optical galaxy spectra

Astronomy & Astrophysics
Context. Reliable and versatile galaxy activity diagnostic tools are indispensable for comprehending the physical processes that drive galaxy evolution.
Daoutis C., Zezas A., Kyritsis E., Kouroumpatzakis K., Bonfini P.   +4 more
doaj   +1 more source

Near-Infrared Molecular Hydrogen Emission from the Central Regions of Galaxies: Regulated Physical Conditions in the Interstellar Medium

, 2004
The central regions of many interacting and early-type spiral galaxies are actively forming stars. This process affects the physical and chemical properties of the local interstellar medium as well as the evolution of the galaxies.
Alton P. B., Burton M. G., Burton M. G., C. M. Bradford, Clegg P. E., D. T. Jaffe, Eric W. Klumpe, G. J. Stacey, Gatley I., Hughes D. H., Israel F. P., Jansen D. J., Kessler M. F., Lemke D., Luke D. Keller, Lumsden S. L., Mao R. Q., Mauersberger R., Moorwood A. F. M., Nakai N., Pak S., Puxley P. J., Puxley P. J., Smith M. D., Smith M. D., Sofue Y., Sohn J., Soojong Pak, Steppe H.   +28 more
core   +3 more sources

The Narrow-Line Region of Narrow-Line Seyfert 1 Galaxies

, 2011
We have studied the physical properties of a sample of narrow-line Seyfert 1 (NLS1) galaxies, and present a summary of our previous results, and new results.
Komossa, S., Xu, Dawei
core   +1 more source

SMILES Data Release. II. Probing Galaxy Evolution during Cosmic Noon and Beyond with NIRSpec Medium-resolution Spectra

The Astrophysical Journal
We present the second data release of the Systematic Mid-Infrared Instrument Legacy Extragalactic Survey (SMILES), focusing on JWST/NIRSpec medium-resolution spectroscopy of galaxies across cosmic time. This release includes spectroscopic observations of
Yongda Zhu, Nina Bonaventura, Yang Sun, George H. Rieke, Stacey Alberts, Jianwei Lyu, Irene Shivaei, Jane Morrison, Zhiyuan Ji, Eiichi Egami, Jakob M. Helton, Marcia J. Rieke, Pierluigi Rinaldi, Fengwu Sun, Christopher N. A. Willmer   +14 more
doaj   +1 more source