Results 141 to 150 of about 20,094 (246)

Chandra Observations of Six QSOs at z $\approx$ 3

, 2005
We report the results of our Chandra observations of six QSOs at $z\sim 3$ from the Palomer Transit Grism Survey. Our primary goal is to investigate the possible systematic change of $\alpha_{ox}$ between $z>4$ and $z\sim 3$, between which a rapid rise ...
Hasinger, Guenther, Lehmann, Ingo, Miyaji, Takamitsu, Schneider, Donald P.   +3 more
core   +1 more source

Integral Field Spectroscopy of Extended Emission-Line Regions around QSOs [PDF]

, 2006
Hai Fu, Alan Stockton
openalex   +1 more source

QSOs in the combined SDSS/GALEX database

, 2008
We discuss selection of QSO candidates from the combined SDSS and GALEX catalogues. We discuss properties of QSOs within the combined sample, and note uncertainties in number counts and completeness, compared with other SDSS-based samples.
Bianchi, L., Hutchings, J. B.
core   +1 more source

Cosmology: Another QSO-Galaxy Pair [PDF]

, 1972
Our Cosmology Correspondent
openalex   +1 more source

The Hosts of z = 2 QSOs

, 1997
6 pages, 4 Figures, Latex, uses lamuphys.sty, also available at http://www.mpa-garching.mpg.de/~itziar To appear in the Proceedings of the ESO/IAC Conference on 'Quasar Hosts' ESO Astrophysics Symposia eds. D. Clements and I.
Aretxaga, I., Boyle, B., Terlevich, R.
openaire   +3 more sources

Are QSOs Gravitationally Lensed? [PDF]

Symposium - International Astronomical Union, 1983
There are now four known cases of multiply imaged QSOs, one with a detected foreground object at roughly half the affine distance to the QSO: 0957+561 (17 mag, z=1.4, separation =6″), 1115+080 (17 mag, z=1.7, sl=1.8″, s2=2.3″), 2345+007 (19 mag, z=2.1, s=7″) and 1635+267 (19 mag z=2, s=5″). In addition, 1548+115 (19 mag, z=1.9) is a probable lens event
openaire   +1 more source

Extremely Red Galaxies at z = 5–9 with MIRI and NIRSpec: Dusty Galaxies or Obscured Active Galactic Nuclei?

The Astrophysical Journal
We study a new population of extremely red objects (EROs) recently discovered by the James Webb Space Telescope (JWST) based on their NIRCam colors F277W − F444W > 1.5 mag.
Guillermo Barro, Pablo G. Pérez-González, Dale D. Kocevski, Elizabeth J. McGrath, Jonathan R. Trump, Raymond C. Simons, Rachel S. Somerville, L. Y. Aaron Yung, Pablo Arrabal Haro, Hollis B. Akins, Michaela B. Bagley, Nikko J. Cleri, Luca Costantin, Kelcey Davis, Mark Dickinson, Steve L. Finkelstein, Mauro Giavalisco, Carlos Gómez-Guijarro, Nimish P. Hathi, Michaela Hirschmann, Benne W. Holwerda, Marc Huertas-Company, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Ray A. Lucas, Casey Papovich, Nor Pirzkal, Lise-Marie Seillé, Sandro Tacchella, Stijn Wuyts, Stephen M. Wilkins, Alexander de la Vega, Guang Yang, Jorge A. Zavala   +33 more
doaj   +1 more source

MLACP 2.0: An updated machine learning tool for anticancer peptide prediction. [PDF]

Comput Struct Biotechnol J, 2022
Thi Phan L, Woo Park H, Pitti T, Madhavan T, Jeon YJ, Manavalan B.   +5 more
europepmc   +1 more source

On the In (I + z) Periodicity in QSO Redshifts [PDF]

, 1977
D. Wills
openalex   +1 more source

Dust in the Smith Cloud? A UV Investigation into the Smith Cloud’s Gas-phase Abundance Patterns

The Astrophysical Journal
The Smith Cloud is a high-velocity cloud (HVC) on its final approach to the Milky Way that shows evidence of interaction with the Galaxy’s disk. We investigate the metallicity and gas-phase chemical depletion patterns in this HVC using UV absorption-line
Johanna T. Vázquez, Kathleen A. Barger, Frances H. Cashman, Andrew J. Fox, Bart P. Wakker, Felix J. Lockman, Alex S. Hill, Suraj Poudel, April L. Horton, Jaq Hernández, Matthew Nuss, Alice Blake, Lauren Corlies, Molly Peeples   +13 more
doaj   +1 more source