Results 81 to 90 of about 1,640 (188)

Emission-line galaxies in the Slice of the Universe

The Astronomical Journal, 1988
The relative spatial distributions of emission-line galaxies (ELGs) and normal galaxies that lie in the sky area covered by the 'Slice' survey (de Lapparent et al., 1986) are considered. ELGs follow the same spatial distribution as found for the Slice galaxies, with the exception that they avoid the Coma cluster.
John J. Salzer, Gregory S. Aldering, Gregory D. Bothun, Joseph M. Mazzarella, Carol J. Lonsdale   +4 more
openaire   +1 more source

H i Properties of Field Galaxies at z ≈ 0.2–0.6: Insights into Declining Cosmic Star Formation

The Astrophysical Journal Letters
We report statistically significant detection of H i 21 cm emission from intermediate-redshift ( z  ≈ 0.2–0.6) galaxies. By leveraging multisightline galaxy survey data from the Cosmic Ultraviolet Baryon Survey and deep radio observations from the ...
David DePalma, Neeraj Gupta, Hsiao-Wen Chen, Robert A. Simcoe, Sergei Balashev, Erin Boettcher, Sebastiano Cantalupo, Mandy C. Chen, Françoise Combes, Claude-André Faucher-Giguère, Sean D. Johnson, Hans-Rainer Klöckner, Jens-Kristian Krogager, Jennifer I-Hsiu Li, Sebastián López, Pasquier Noterdaeme, Patrick Petitjean, Zhijie Qu, Gwen C. Rudie, Joop Schaye, Fakhri Zahedy   +20 more
doaj   +1 more source

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

Emission-line galaxies in the Bootes void

The Astrophysical Journal, 1987
Les deplacements vers le rouge de 3 nouvelles galaxies montrent qu'elles sont a l'interieur du vide. Le nombre des galaxies dans le vide de Bootes est donc actuellement de huit.
J. Ward Moody, Robert P. Kirshner, Gordon M. MacAlpine, Stephen A. Gregory   +3 more
openaire   +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

Direct Abundance Maps and Radial Metallicity Gradients of Two Galaxies at z ∼ 4–5 in the GARDEN Survey

The Astrophysical Journal
We investigate galaxies in the Galaxies at All Redshifts Deciphered and Explained with the NIRSpec microshutter array (MSA; GARDEN) survey that exhibit auroral emission lines, enabling spatially resolved measurements of electron temperature and direct ...
Letizia Stanghellini, Susan A. Kassin, Camilla Pacifici, Jane E. Morrison, Mark Dickinson, Ezra Sukay, Celia R. Mulcahey, Louis E. Bergeron, Michael W. Regan, Christopher N. A. Willmer, Benjamin J. Weiner, Nadia Dencheva, David Law, Alexander de la Vega, Anton M. Koekemoer, Christopher Conselice, Jonathan P. Gardner, Yicheng Guo, Francois Hammer, Alina Henry, Benne W. Holwerda, Jeyhan Kartaltepe, Ray A. Lucas, Mathieu Puech, Marc Rafelski, Irene Shivaei, Charlotte Welker, Xinfeng Xu, L. Y. Aaron Yung   +28 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

Emission line galaxies at z = 6.5

, 2003
2 pages, no figures, to be published in "Multiwavelength mapping of galaxy formation and evolution", proceedings of a conference held in Venice, October 13-16 2003, one typographic error ...
Kurk, Jaron, Cimatti, Andrea, Alighieri, Sperello di Serego, Vernet, Joel, Daddi, Emanuele   +4 more
openaire   +2 more sources

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