Results 81 to 90 of about 3,105 (226)

Luminous Infrared Galaxies in a Merging Sequence: ISO Observations [PDF]

Symposium - International Astronomical Union, 1999
We report mid-infrared images of several luminous infrared galaxies (LIGs) taken with ISOCAM on the Infrared Space Observatory (ISO). These LIGs were chosen to represent different phases of a merger sequence of galaxy-galaxy interaction with special emphasis on early/intermediate stages of merging.
C. Y. Hwang, K. Y. Lo, Y. Gao, R. A. Gruendl, N. Y. Lu   +4 more
openaire   +1 more source

JWST imaging of the closest globular clusters—I. Possible infrared excess among white dwarfs in NGC 6397

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We present James Webb Space Telescope observations of the globular cluster NGC 6397 and use them to extend to infrared wavelengths the characterization of the cluster's entire white dwarf (WD) cooling sequence (CS). The data allows us to probe fundamental astrophysical WD properties and to search for evidence in their colors for (or against ...
L. R. Bedin, D. Nardiello, M. Salaris, M. Libralato, P. Bergeron, A. J. Burgasser, D. Apai, M. Griggio, M. Scalco, J. Anderson, R. Gerasimov, A. Bellini   +11 more
wiley   +1 more source

A Complete 16 μm Selected Galaxy Sample at z ∼ 1. II. Morphological Analysis

The Astrophysical Journal
We present a morphological analysis of the 16 μ m flux-density-limited galaxy sample at 0.8 < z < 1.3 from Huang et al. (2021). At the targeted redshift, the 16 μ m emission corresponds to the polycyclic aromatic hydrocarbon feature from intense star ...
Piaoran Liang, Y. Sophia Dai, Jia-Sheng Huang, Cheng Cheng, Yaru Shi   +4 more
doaj   +1 more source

Two Candidates for Dual AGN in Dwarf-dwarf Galaxy Mergers

The Astrophysical Journal, 2023
Dual active galactic nuclei (DAGN) are important for understanding galaxy-merger-triggered fueling of black holes and the hierarchical growth of structures.
Marko Mićić, Olivia J. Holmes, Brenna N. Wells, Jimmy A. Irwin   +3 more
doaj   +1 more source

Buried AGNs and Starbursts in Luminous and Ultra-Luminous Infrared Galaxies [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWe present the first results of a Spitzer Space Telescope survey of 28 LIRGs and ULIRGs. We used infrared emission lines to separeate AGN and starburst powered systems. We find strong evidence that the incidence of nuclear activity increases with infrared luminosity.
João Rodrigo S. Leão, Patrícia Hepp, Claus Leitherer   +2 more
openaire   +1 more source

Not So Fast: A New Catalog of Meteor Persistent Trains

Journal of Geophysical Research: Space Physics, Volume 129, Issue 7, July 2024.
Abstract This paper presents the results of a nearly 2‐year long campaign to detect and analyze meteor persistent trains (PTs)—self‐emitting phenomena which can linger up to an hour after their parent meteor. The modern understanding of PTs has been primarily developed from the Leonid storms at the turn of the century; our goal was to assess the ...
L. E. Cordonnier, K. S. Obenberger, J. M. Holmes, G. B. Taylor, D. Vida   +4 more
wiley   +1 more source

Optical Morphology Evolution of Infrared Luminous Galaxies in GOODS-N

, 2005
International audienceWe combine optical morphologies and photometry from HST, redshifts from Keck, and mid-infrared luminosities from Spitzer for an optically selected sample of ~800 galaxies in GOODS-N to track the morphology evolution of luminous ...
Melbourne, J. E., Le Floc'H, E., Koo, David C.   +2 more
core   +1 more source

How Accurately Can Obscured Galaxy Luminosities Be Measured Using Spectral Energy Distribution Fitting of Near- through Far-infrared Observations?

The Astrophysical Journal
Infrared-luminous galaxies are important sites of stellar and black hole mass assembly at most redshifts. Their luminosities are often estimated by fitting spectral energy distribution (SED) models to near- to far-infrared data, but the dependence of ...
Duncan Farrah, Kiana Ejercito, Andreas Efstathiou, David Leisawitz, Athena Engholm, Irene Shivaei, Matteo Bonato, David L. Clements, Sara Petty, Lura. K. Pitchford, Charalambia Varnava, Jose Afonso, Carlotta Gruppioni, Evanthia Hatziminaoglou, Andrew Hoffman, Mark Lacy, Brenda C. Matthews, Conor Nixon, Chris Pearson, Berke Vow Ricketti, Dimitra Rigopoulou, Loren Robinson, Locke D. Spencer, Lingyu Wang, David B. Sanders, Gerard van Belle   +25 more
doaj   +1 more source

The HST Large Programme on NGC 6752 ‐ V. Differences in luminosity and mass function among stellar populations

Astronomische Nachrichten, Volume 345, Issue 5, June 2024.
Abstract We exploit the astro‐photometric dataset of the multi‐epoch infrared parallel field of a Hubble Space Telescope Large Programme aimed at studying the faintest stars of the globular cluster NGC 6752 to determine the luminosity and mass functions of the multiple stellar populations of this cluster. Thanks to the measurement of proper motions and
Michele Scalco, Roman Gerasimov, Luigi R. Bedin, Enrico Vesperini, Domenico Nardiello, Maurizio Salaris, Adam Burgasser, Jay Anderson, Mattia Libralato, Andrea Bellini, Piero Rosati   +10 more
wiley   +1 more source

The Magellan M2FS Spectroscopic Survey of High-redshift Galaxies: The Brightest Lyman-break Galaxies at z ∼ 6

The Astrophysical Journal
We present a study of a sample of 45 spectroscopically confirmed, UV luminous galaxies at z ∼ 6. They were selected as bright Lyman-break galaxies (LBGs) using deep multiband optical images in more than 2 deg ^2 of the sky, and subsequently identified ...
Shuqi Fu, Linhua Jiang, Yuanhang Ning, Weiyang Liu, Zhiwei Pan   +4 more
doaj   +1 more source