Search Results - "MULCHAEY, JOHN S"

High-mass X-ray binaries in nearby metal-poor galaxies: on the contribution to nebular He ii emission by Senchyna, Peter, Stark, Daniel P, Mirocha, Jordan, Reines, Amy E, Charlot, Stéphane, Jones, Tucker, Mulchaey, John S

“…ABSTRACT Despite significant progress both observationally and theoretically, the origin of high-ionization nebular He ii emission in galaxies dominated by…”
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The growth of brightest cluster galaxies and intracluster light over the past 10 billion years by DeMaio, Tahlia, Gonzalez, Anthony H, Zabludoff, Ann, Zaritsky, Dennis, Aldering, Greg, Brodwin, Mark, Connor, Thomas, Donahue, Megan, Hayden, Brian, Mulchaey, John S, Perlmutter, Saul, Stanford, S A

“…We constrain the evolution of the brightest cluster galaxy plus intracluster light (BCG + ICL) using an ensemble of 42 galaxy groups and clusters that span…”
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On the origin of excess cool gas in quasar host haloes by Johnson, Sean D., Chen, Hsiao-Wen, Mulchaey, John S.

“…Previous observations of quasar host haloes at z ≈ 2 have uncovered large quantities of cool gas that exceed what is found around inactive galaxies of both…”
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X-Ray Observations of a z ∼ 6.2 Quasar/Galaxy Merger by Connor, Thomas, Bañados, Eduardo, Stern, Daniel, Decarli, Roberto, Schindler, Jan-Torge, Fan, Xiaohui, Farina, Emanuele Paolo, Mazzucchelli, Chiara, Mulchaey, John S., Walter, Fabian

“…Quasars at early redshifts (z > 6) with companion galaxies offer unique insights into the growth and evolution of the first supermassive black holes. Here, we…”
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The Dawn of the Red: star formation histories of group galaxies over the past 5 billion years by McGee, Sean L., Balogh, Michael L., Wilman, David J., Bower, Richard G., Mulchaey, John S., Parker, Laura C., Oemler Jr, Augustus

“…We examine the star formation properties of group and field galaxies in two surveys, Sloan Digital Sky Survey (at z∼ 0.08) and Group Environment Evolution…”
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THE SUPPRESSION OF STAR FORMATION AND THE EFFECT OF THE GALAXY ENVIRONMENT IN LOW-REDSHIFT GALAXY GROUPS by Rasmussen, Jesper, MULCHAEY, JOHN S, Bai, Lei, PONMAN, TREVOR J, RAYCHAUDHURY, SOMAK, DARIUSH, ALI

“…Understanding the interaction between galaxies and their surroundings is central to building a coherent picture of galaxy evolution. Here we use Galaxy…”
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A population of ultraviolet-dim protoclusters detected in absorption by Newman, Andrew B., Rudie, Gwen C., Blanc, Guillermo A., Qezlou, Mahdi, Bird, Simeon, Kelson, Daniel D., Pérez, Victoria, Congiu, Enrico, Lemaux, Brian C., Dressler, Alan, Mulchaey, John S.

“…Galaxy protoclusters, which will eventually grow into the massive clusters we see in the local Universe, are usually traced by locating overdensities of…”
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The Cosmic Ultraviolet Baryon Survey (CUBS). VII. On the Warm-hot Circumgalactic Medium Probed by O vi and Ne viii at 0.4 ≲ z ≲ 0.7 by Qu, Zhijie, Chen, Hsiao-Wen, Johnson, Sean D., Rudie, Gwen C., Zahedy, Fakhri S., DePalma, David, Schaye, Joop, Boettcher, Erin T., Cantalupo, Sebastiano, Chen, Mandy C., Faucher-Giguère, Claude-André, Li, Jennifer I-Hsiu, Mulchaey, John S., Petitjean, Patrick, Rafelski, Marc

“…This paper presents a newly established sample of 103 unique galaxies or galaxy groups at 0.4 ≲ z ≲ 0.7 from the Cosmic Ultraviolet Baryon Survey (CUBS) for…”
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The GEEC2 spectroscopic survey of Galaxy groups at 0.8 < z < 1 by Balogh, Michael L., McGee, Sean L., Mok, Angus, Wilman, David J., Finoguenov, Alexis, Bower, Richard G., Mulchaey, John S., Parker, Laura C., Tanaka, Masayuki

“…We present the data release of the Gemini-South GMOS spectroscopy in the fields of 11 galaxy groups at 0.8 < z < 1, within the COSMOS field. This forms the…”
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Substructure in the most massive GEEC groups: field-like populations in dynamically active groups by Hou, Annie, Parker, Laura C., Wilman, David J., McGee, Sean L., Harris, William E., Connelly, Jennifer L., Balogh, Michael L., Mulchaey, John S., Bower, Richard G.

“…The presence of substructure in galaxy groups and clusters is believed to be a sign of recent galaxy accretion and can be used to probe not only the assembly…”
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Active Galactic Nuclei in Groups and Clusters of Galaxies: Detection and Host Morphology by Arnold, Timothy J, Martini, Paul, Mulchaey, John S, Berti, Angela, Jeltema, Tesla E

“…The incidence and properties of active galactic nuclei (AGNs) in the field, groups, and clusters can provide new information about how these objects are…”
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Direct observational evidence for a large transient galaxy population in groups at 0.85 < z < 1 by Balogh, Michael L., McGee, Sean L., Wilman, David J., Finoguenov, Alexis, Parker, Laura C., Connelly, Jennifer L., Mulchaey, John S., Bower, Richard G., Tanaka, Masayuki, Giodini, Stefania

“…We introduce our survey of galaxy groups at 0.85 < z < 1, as an extension of the Group Environment and Evolution Collaboration. Here we present the first…”
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The Distribution of Active Galactic Nuclei in Clusters of Galaxies by Martini, Paul, Mulchaey, John S, Kelson, Daniel D

“…We present a study of the distribution of AGNs in clusters of galaxies with a uniformly selected, spectroscopically complete sample of 35 AGNs in eight…”
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X-RAY PROPERTIES OF GROUPS OF GALAXIES by Mulchaey, John S

“…ROSAT observations indicate that approximately half of all nearby groups of galaxies contain spatially extended X-ray emission. The radial extent of the X-ray…”
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The Properties of Poor Groups of Galaxies. I. Spectroscopic Survey and Results by Zabludoff, Ann I, Mulchaey, John S

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Spectroscopic Confirmation of a Large Population of Active Galactic Nuclei in Clusters of Galaxies by Martini, Paul, Kelson, Daniel D, Kim, Eunhyeuk, Mulchaey, John S, Athey, Alex A

“…We have completed a spectroscopic survey of X-ray point sources in eight low-redshift clusters of galaxies (0.05 < z < 0.31) and have identified 40 cluster…”
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On the possible environmental effect in distributing heavy elements beyond individual gaseous haloes by Johnson, Sean D, Chen, Hsiao-Wen, Mulchaey, John S

“…We present a study of extended galaxy halo gas through H i and O vi absorption over two decades in projected distance at z ... 0.2. The study is based on a…”
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First Measurement of a Rapid Increase in the AGN Fraction in High-Redshift Clusters of Galaxies by Eastman, Jason, Martini, Paul, Sivakoff, Gregory, Kelson, Daniel D, Mulchaey, John S, Tran, Kim-Vy

“…We present the first measurement of the AGN fraction in high-redshift clusters of galaxies (z similar to 0.6) with spectroscopy of one cluster and archival…”
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Do group dynamics play a role in the evolution of member galaxies? by Hou, Annie, Parker, Laura C., Balogh, Michael L., McGee, Sean L., Wilman, David J., Connelly, Jennifer L., Harris, William E., Mok, Angus, Mulchaey, John S., Bower, Richard G., Finoguenov, Alexis

“…We examine galaxy groups from the present epoch to z ∼ 1 to explore the impact of group dynamics on galaxy evolution. We use group catalogues from the Sloan…”
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Lost but not forgotten: intracluster light in galaxy groups and clusters by DeMaio, Tahlia, Gonzalez, Anthony H, Zabludoff, Ann, Zaritsky, Dennis, Connor, Thomas, Donahue, Megan, Mulchaey, John S

“…AbstractWith Hubble Space Telescope imaging, we investigate the progenitor population and formation mechanisms of the intracluster light (ICL) for 23 galaxy…”
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