Results 61 to 70 of about 1,316 (234)

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

UV-bright Star-forming Clumps and Their Host Galaxies in UVCANDELS at 0.5 ≤ z ≤ 1

The Astrophysical Journal, 2023
Giant star-forming clumps are a prominent feature of star-forming galaxies (SFGs) and contain important clues on galaxy formation and evolution. However, the basic demographics of clumps and their host galaxies remain uncertain.
Alec Martin, Yicheng Guo, Xin Wang, Anton M. Koekemoer, Marc Rafelski, Harry I. Teplitz, Rogier A. Windhorst, Anahita Alavi, Norman A. Grogin, Laura Prichard, Ben Sunnquist, Daniel Ceverino, Nima Chartab, Christopher J. Conselice, Y. Sophia Dai, Avishai Dekel, Jonathan P. Gardner, Eric Gawiser, Nimish P. Hathi, Matthew J. Hayes, Rolf A. Jansen, Zhiyuan Ji, David C. Koo, Ray A. Lucas, Nir Mandelker, Vihang Mehta, Bahram Mobasher, Kalina V. Nedkova, Joel Primack, Swara Ravindranath, Brant E. Robertson, Michael J. Rutkowski, Zahra Sattari, Emmaris Soto, L. Y. Aaron Yung   +34 more
doaj   +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

PEARLS: Discovery of Point-source Features within Galaxies in the North Ecliptic Pole Time Domain Field

The Astrophysical Journal
The first public 0.9–4.4 μ m NIRCam images of the North Ecliptic Pole Time Domain Field uncovered galaxies displaying point-source features in their cores as seen in the longer-wavelength filters. We visually identified a sample of 66 galaxies (∼1 galaxy
Rafael Ortiz III, Rogier A. Windhorst, Seth H. Cohen, Steven P. Willner, Rolf A. Jansen, Timothy Carleton, Patrick S. Kamieneski, Michael J. Rutkowski, Brent M. Smith, Jake Summers, Cheng Cheng, Dan Coe, Christopher J. Conselice, Jose M. Diego, Simon P. Driver, Jordan C. J. D’Silva, Brenda L. Frye, Hansung B. Gim, Norman A. Grogin, Heidi B. Hammel, Nimish P. Hathi, Benne W. Holwerda, Minhee Hyun, Myungshin Im, William C. Keel, Anton M. Koekemoer, Juno Li, Madeline A. Marshall, Tyler J. McCabe, Noah J. McLeod, Stefanie N. Milam, Rosalia O’Brien, Nor Pirzkal, Aaron S. G. Robotham, Russell E. Ryan Jr., Christopher N. A. Willmer, Haojing Yan, Min S. Yun, Adi Zitrin   +38 more
doaj   +1 more source

GOALS-JWST: NIRCam and MIRI Imaging of the Circumnuclear Starburst Ring in NGC 7469

The Astrophysical Journal Letters, 2023
We present James Webb Space Telescope (JWST) imaging of NGC 7469 with the Near-Infrared Camera and the Mid-InfraRed Instrument. NGC 7469 is a nearby, z = 0.01627, luminous infrared galaxy that hosts both a Seyfert Type-1.5 nucleus and a circumnuclear ...
Thomas Bohn, Hanae Inami, Tanio Diaz-Santos, Lee Armus, S. T. Linden, Vivian U, Jason Surace, Kirsten L. Larson, Aaron S. Evans, Shunshi Hoshioka, Thomas Lai, Yiqing Song, Joseph M. Mazzarella, Loreto Barcos-Munoz, Vassilis Charmandaris, Justin H. Howell, Anne M. Medling, George C. Privon, Jeffrey A. Rich, Sabrina Stierwalt, Susanne Aalto, Torsten Böker, Michael J. I. Brown, Kazushi Iwasawa, Matthew A. Malkan, Paul P. van der Werf, Philip Appleton, Christopher C. Hayward, Francisca Kemper, David Law, Jason Marshall, Eric J. Murphy, David Sanders   +32 more
doaj   +1 more source

Arp 302: Nonstarburst Luminous Infrared Galaxies [PDF]

The Astrophysical Journal, 1997
AAS Latex plus two postscript figures. ApJ Letters (accepted)
Robert A. Gruendl, Yu Gao, K. Y. Lo
openaire   +3 more sources

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

Molecular gas in luminous infrared galaxies

The Astrophysical Journal, 1991
Radio observations of 60 bright IRAS galaxies with redshifts of 1500-25,000 km/sec are reported. Data obtained in the 1-0 line of CO using the 12-m NRAO radio telescope during 1985-1988 are presented in extensive tables, graphs, and line profiles and analyzed along with similar data on 29 less distant IRAS bright galaxies (Tinney et al., 1990).
David B. Sanders, Nick Scoville, B. T. Soifer   +2 more
openaire   +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

The Evolution of the Size and Merger Fraction of Submillimeter Galaxies across 1 < z ≲ 6 as Observed by JWST

The Astrophysical Journal
Precise tracking of the growth in galaxy size and the evolution of merger fractions with redshift is vital for understanding the formation history of submillimeter galaxies (SMGs). This study investigates this evolution over a broad redshift range (1 
Jian Ren, F. S. Liu, Nan Li, Pinsong Zhao, Qifan Cui, Qi Song, Yubin Li, Hao Mo, Hassen M. Yesuf, Weichen Wang, Fangxia An, Xian Zhong Zheng   +11 more
doaj   +1 more source