Results 71 to 80 of about 35,402 (267)

Accretion Onto Weakly Magnetized Neutron Stars: Polarization Theory and Its Application to X‐Ray Burster GX 13+1

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT Observations show that the x‐ray emission of the accreting weakly magnetized neutron stars (WMNSs) is polarized. In this article, we summarize the analytical models for the polarized emission of various components of the WMNSs. We introduce a missing theoretical model, where we assume the emission comes from the spreading layer, the extension ...
Anna Bobrikova, Sofia V. Forsblom
wiley   +1 more source

Mid-Infrared Colors of Dwarf Galaxies: Young Starbursts Mimicking Active Galactic Nuclei

, 2016
Searching for active galactic nuclei (AGN) in dwarf galaxies is important for our understanding of the seed black holes that formed in the early Universe. Here, we test infrared selection methods for AGN activity at low galaxy masses.
Greene, Jenny E., Hainline, Kevin N., Reines, Amy E., Stern, Daniel   +3 more
core   +1 more source

SGAS 143845.1+145407: A Big, Cool Starburst at Redshift 0.816 [PDF]

, 2012
We present the discovery and a detailed multi-wavelength study of a strongly-lensed luminous infrared galaxy at z=0.816. Unlike most known lensed galaxies discovered at optical or near-infrared wavelengths this lensed source is red, r-Ks = 3.9 [AB ...
Abramson, Louis E., Bans, Alissa, Baxter, Eric J., Bayliss, Matthew B., Benford, Dominic J., Dahle, Hakon, Finkelstein, Keely D., Gladders, Michael D., Helsby, Jennifer E., Kelson, Daniel D., Koester, Benjamin P., Monson, Andrew J., Murphy, David, Persson, S. E., Rigby, Jane R., Sharon, Keren, Wuyts, Eva   +16 more
core   +3 more sources

An Hα Impression of Lyα Galaxies at z ≃ 6 with Deep JWST/NIRCam Imaging

The Astrophysical Journal Letters, 2023
We present a study of seven spectroscopically confirmed (Ly α -emitting) galaxies at redshift z ≃ 6 using the JWST/NIRCam imaging data. These galaxies, with a wide range of Ly α luminosities, were recently observed in a series of NIRCam broad and medium ...
Yuanhang Ning, Zheng Cai, Linhua Jiang, Xiaojing Lin, Shuqi Fu, Daniele Spinoso   +5 more
doaj   +1 more source

The Average Physical Properties and Star Formation Histories of the UV-Brightest Star-Forming Galaxies at z~3.7

, 2011
[Abridged] We investigate the average physical properties and star formation histories of the most UV-luminous star-forming galaxies at z~3.7. Our results are derived from analyses of the average spectral energy distributions (SEDs), constructed from ...
Adelberger, Anthony H. Gonzalez, Arjun Dey, Asantha Cooray, Ashby, Bouwens, Bouwens, Bouwens, Bouwens, Brown, Buell T. Jannuzi, Calzetti, Conroy, Daddi, Daddi, Daniel Stern, Dekel, Desai, Eilat Glikman, Erb, Ferguson, Fuyan Bian, Giavalisco, Jannuzi, Kajisawa, Kolatt, Kyoung-Soo Lee, Lee, Lee, Leitherer, Madau, Marchesini, Marchesini, Mark Brodwin, Martini, Meurer, Michael C. Cooper, Michael J. I. Brown, Naveen Reddy, Noeske, Ouchi, Pannella, Papovich, Quadri, Reddy, Reddy, Reddy, Sawicki, Shapley, Shapley, Shapley, Stark, Steidel, Vanzella, Xiaohui Fan   +54 more
core   +1 more source

The Oxygen Abundances of Luminous and Ultraluminous Infrared Galaxies [PDF]

The Astrophysical Journal, 2008
Luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) dominate the star formation rate budget of the universe at z > 1, yet no local measurements of their heavy element abundances exist. We measure nuclear or near-nuclear oxygen abundances in a sample of 100 star-forming LIRGs and ULIRGs using new, previously published, and archival ...
David S. N. Rupke, Andrew J. Baker, Sylvain Veilleux   +2 more
openaire   +3 more sources

Characterizing the Molecular Gas in Infrared Bright Galaxies with CARMA

The Astrophysical Journal
We present the CO(1–0) maps of 28 infrared-bright galaxies from the Great Observatories All-Sky Luminous Infrared Galaxy Survey (GOALS) taken with the Combined Array for Research in Millimeter Astronomy (CARMA).
Katherine Alatalo, Andreea O. Petric, Lauranne Lanz, Kate Rowlands, Vivian U, Kirsten L. Larson, Lee Armus, Loreto Barcos-Muñoz, Aaron S. Evans, Jin Koda, Yuanze Luo, Anne M. Medling, Kristina E. Nyland, Justin A. Otter, Pallavi Patil, Fernando Peñaloza, Diane Salim, David B. Sanders, Elizaveta Sazonova, Maya Skarbinski, Yiqing Song, Ezequiel Treister, C. Meg Urry   +22 more
doaj   +1 more source

Probing extreme black‐hole outflows on short timescales via high spectral‐resolution x‐ray imagers

Astronomische Nachrichten, Volume 345, Issue 6-7, July-August 2024.
Abstract We investigate outflows and the physics of super‐Eddington versus sub‐Eddington regimes in black hole systems. Our focus is on prospective science using next‐generation high‐resolution soft x‐ray instruments. We highlight the properties of black hole ultraluminous x‐ray source (ULX) systems in particular. Owing to scale invariance in accreting
C. Pinto, J. F. Steiner, A. Bodaghee, P. Chakraborty, M. Sobolewska, D. R. Pasham, A. Ogorzalek, J. Zuhone, A. Bogdan, M. Vogelsberger   +9 more
wiley   +1 more source

Dusty Starbursts and the Growth of Cosmic Structure

, 2004
Dusty starbursts were more numerous around z~1 than today and appear to be responsible for the majority of cosmic star formation over the Hubble time.
A. Franceschini, D. Elbaz, D. Elbaz, D. Elbaz, D. Fadda, H. Aussel, H. Flores, J.G. Cohen, R.R. Chary, S.C. Chapman   +9 more
core   +2 more sources

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