Results 71 to 80 of about 765,605 (153)

Tracing the Cosmic Evolution of the Cool Circumgalactic Medium of Luminous Red Galaxies with DESI Year 1 Data

The Astrophysical Journal
We investigate the properties of the cool circumgalactic medium (CGM) of massive galaxies and their cosmic evolution. By using the year 1 data set of luminous red galaxies (LRGs) and QSOs from the Dark Energy Spectroscopic Instrument survey, we construct
Yu-Ling Chang, Ting-Wen Lan, J. Xavier Prochaska, Malgorzata Siudek, J. Aguilar, S. Ahlen, Abhijeet Anand, D. Bianchi, D. Brooks, F. J. Castander, T. Claybaugh, A. de la Macorra, P. Doel, S. Ferraro, A. Font-Ribera, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, J. Guy, K. Honscheid, R. Joyce, S. Juneau, A. Kremin, O. Lahav, C. Lamman, M. Landriau, L. Le Guillou, M. E. Levi, M. Manera, A. Meisner, R. Miquel, S. Nadathur, J. A. Newman, W. J. Percival, C. Poppett, F. Prada, I. Pérez-Ràfols, G. Rossi, E. Sanchez, D. Schlegel, M. Schubnell, D. Sprayberry, G. Tarlé, B. A. Weaver, R. Zhou, H. Zou   +46 more
doaj   +1 more source

The NuSTAR Serendipitous Survey: The 80 Month Catalog and Source Properties of the High-energy Emitting Active Galactic Nucleus and Quasar Population

The Astrophysical Journal Supplement Series
We present a catalog of hard X-ray serendipitous sources detected in the first 80 months of observations by the Nuclear Spectroscopic Telescope Array (NuSTAR).
Claire L. Greenwell, Lizelke Klindt, George B. Lansbury, David J. Rosario, David M. Alexander, James Aird, Daniel Stern, Karl Forster, Michael J. Koss, Franz E. Bauer, Claudio Ricci, John Tomsick, William N. Brandt, Thomas Connor, Peter G. Boorman, Adlyka Annuar, David R. Ballantyne, Chien-Ting Chen, Francesca Civano, Andrea Comastri, Victoria A. Fawcett, Francesca M. Fornasini, Poshak Gandhi, Fiona Harrison, Marianne Heida, Ryan Hickox, Elias S. Kammoun, Lauranne Lanz, Stefano Marchesi, Gaël Noirot, Encarni Romero-Colmenero, Ezequiel Treister, C. Megan Urry, Petri Väisänen, Brian van Soelen   +34 more
doaj   +1 more source

Resolved [C ii] emission from z > 6 quasar host–companion galaxy pairs [PDF]

, 2019
We report on ≈0 35 (≈2kpc) resolution observations of the [C ii] and dust continuum emission from five z > 6 quasar host–companion galaxy pairs obtained with the Atacama Large Millimeter/submillimeter Array.
Rix, H., Wang, R., Wang, Ran, Farina, Emanuele P., Rix, Hans-Walter, Venemans, B., Novak, M., Decarli, R., Mazzucchelli, C., Walter, F., Farina, E., Novak, Mladen, Fan, Xiaohui, Mazzucchelli, Chiara, Walter, Fabian, Carilli, C., Decarli, Roberto, Fan, X., Carilli, Chris L., Neeleman, M., Bañados, Eduardo, Riechers, D., Riechers, Dominik A., Venemans, Bram P., Neeleman, Marcel, Bañados, E.   +25 more
core   +1 more source

A candidate kiloparsec-scale quasar pair at z=5.66

, 2021
We report the discovery of a close quasar pair candidate at z = 5.66, J2037-4537. J2037-4537 is resolved into two quasar images at the same redshift in ground-based observations.
Fan, X., Yang, J., Wang, F., Yue, M., Xiaohui Fan, Jinyi Yang, Feige Wang, Minghao Yue   +7 more
core   +1 more source

Pushing the Atacama Large Millimeter/submillimeter Array to the Limit: 140 pc Resolution Observations of a z = 6.6 Quasar–Galaxy Merger Resolve Strikingly Different Morphologies of Dust Continuum and [C ii] 158 μm Emission

The Astrophysical Journal
We present $0\mathop{.}\limits^{^{\prime\prime} }026$ (140 pc) resolution Atacama Large Millimeter/submillimeter Array observations of [C ii ] 158 μ m and dust continuum emission of the z = 6.6 quasar J0305–3150, resolved over ∼​​​​​​300–400 independent ...
Romain A. Meyer, Bram Venemans, Marcel Neeleman, Roberto Decarli, Fabian Walter   +4 more
doaj   +1 more source

Powerful quasar outflow in a massive disc galaxy at z ~ 5 [PDF]

, 2017
There is growing observational evidence of high-redshift quasars launching energetic, fast outflows, but the effects that these have on their host galaxies is poorly understood.

core   +2 more sources

A Comprehensive Characterization of Galaxy-cool CGM Connections at z < 0.4 with DESI Year 1 Data

The Astrophysical Journal
We investigate the relationships between the cool circumgalactic medium (CGM), traced by Ca ii absorption lines, and galaxy properties at z  
Yu Voon Ng, Ting-Wen Lan, J. Xavier Prochaska, Amélie Saintonge, Yu-Ling Chang, Małgorzata Siudek, J. Aguilar, S. Ahlen, D. Bianchi, D. Brooks, T. Claybaugh, A. de la Macorra, A. Dey, P. Doel, S. Ferraro, J. E. Forero-Romero, E. Gaztañaga, S. Gontcho A Gontcho, G. Gutierrez, K. Honscheid, M. Ishak, S. Juneau, T. Kisner, A. Kremin, M. Landriau, L. Le Guillou, M. Manera, A. Meisner, R. Miquel, J. Moustakas, A. D. Myers, S. Nadathur, C. Poppett, I. Pérez-Ràfols, G. Rossi, E. Sanchez, D. Schlegel, M. Schubnell, H. Seo, J. Silber, G. Tarlé, B. A. Weaver, R. Zhou, H. Zou   +43 more
doaj   +1 more source

Quasar lenses and pairs in the VST-ATLAS and Gaia [PDF]

, 2017
We report on discovery results from a quasar lens search in the ATLAS-DR3 public footprint. Spectroscopic follow-up campaigns, conducted at the 2.6 m Nordic Optical Telescope (La Palma) and 3.6mNew Technology Telescope (La Silla) in 2016, yielded seven ...
Schechter, P. L., Morgan, N. D., Motta, V., Shanks, T., D Malesani, Y Apostolovski, Rojas, K., A Agnello, Rusu, C. E., T Anguita, K Rojas, Malesani, D., Anguita, T., Treu, T., T Treu, Schechter, P.L., B Chehade, Grillo, C., C E Rusu, T Shanks, P L Schechter, Rusu, C.E., Agnello, A., N D Morgan, V Motta, Morgan, N.D., Chehade, B., C Grillo, Apostolovski, Y.   +28 more
core   +1 more source

Impact of Radio-mode Feedback on the Covering Fraction of the Circumgalactic Medium of Quasars

The Astrophysical Journal
Utilizing data from the Low-Frequency Array Two-meter Sky Survey and the Sloan Digital Sky Survey, we assemble a sample of 1469 projected quasar pairs with detected radio emissions from foreground quasars, as well as a control sample of 5846 pairs ...
Wen-Qiang Liang, Zhi-fu Chen, Rui-Jing Lu, Jing Li, Zhe-Geng Chen   +4 more
doaj   +1 more source

H I 21 cm Absorption Associated with Foreground Galaxies on Top of Quasars

The Astrophysical Journal
A systematic search for H i 21 cm absorption in quasar–galaxy pairs (QGPs) provides a powerful means to map the distribution of cold gas around high-redshift star-forming galaxies.
Labanya K. Guha, Raghunathan Srianand, Rajeshwari Dutta   +2 more
doaj   +1 more source