Search Results - "Zepf, Stephen E."

Is the M81 Fast Radio Burst Host Globular Cluster Special? by Dage, Kristen C., Bahramian, Arash, James, Clancy W., Kundu, Arunav, Rhode, Katherine L., Strader, Jay, Vesperini, Enrico, Zepf, Stephen E.

“…We use multiband archival Hubble Space Telescope (HST) observations to measure the photometric and structural parameters of the M81 globular cluster (GC) that…”
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Slow decline and rise of the broad [O iii] emission line in globular cluster black hole candidate RZ2109 by Dage, Kristen C, Zepf, Stephen E, Bahramian, Arash, Strader, Jay, Maccarone, Thomas J, Peacock, Mark B, Kundu, Arunav, Steele, Matthew M, Britt, Christopher T

“…ABSTRACT RZ2109 is the first of several extragalactic globular clusters shown to host an ultraluminous X-ray source. RZ2109 is particularly notable because…”
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Very Broad [O III] λλ4959, 5007 Emission from the NGC 4472 Globular Cluster RZ 2109 and Implications for the Mass of Its Black Hole X-Ray Source by Zepf, Stephen E, Stern, Daniel, Maccarone, Thomas J, Kundu, Arunav, Kamionkowski, Marc, Rhode, Katherine L, Salzer, John J, Ciardullo, Robin, Gronwall, Caryl

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The Low-Mass X-Ray Binary-Globular Cluster Connection in NGC 4472 by Kundu, Arunav, Maccarone, Thomas J, Zepf, Stephen E

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Far ultra-violet insights into NGC 1399’s globular cluster population by Dage, Kristen C, Sun, Yifan, Kundu, Arunav, Zepf, Stephen E, Haggard, Daryl

“…We investigate archival Hubble Space Telescope ACS/SBC F140LP observations of NGC 1399 to search for evidence of multiple stellar populations in extragalactic…”
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THE X-RAY LUMINOSITY FUNCTION OF LOW MASS X-RAY BINARIES IN EARLY-TYPE GALAXIES, THEIR METAL-RICH, AND METAL-POOR GLOBULAR CLUSTERS by Peacock, Mark B., Zepf, Stephen E.

“…ABSTRACT We present the X-ray luminosity function (XLF) of low-mass X-ray binaries (LMXBs) in the globular clusters (GCs) and fields of seven early-type…”
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The Low-Mass X-Ray Binary-Globular Cluster Connection. II. NGC 4472 X-Ray Source Properties and Source Catalogs by Maccarone, Thomas J, Kundu, Arunav, Zepf, Stephen E

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Kinematical fingerprints of star cluster early dynamical evolution by Vesperini, Enrico, Varri, Anna Lisa, McMillan, Stephen L. W., Zepf, Stephen E.

“…We study the effects of the external tidal field on the violent relaxation phase of star clusters dynamical evolution, with particular attention to the…”
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Globular clusters in the far-ultraviolet: evidence for He-enriched second populations in extragalactic globular clusters? by Peacock, Mark B, Zepf, Stephen E, Kundu, Arunav, Chael, Julia

“…We investigate the integrated far-ultraviolet (FUV) emission from globular clusters. We present new FUV photometry of M87's clusters based on archival Hubble…”
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A black hole in a globular cluster by Maccarone, Thomas J, Kundu, Arunav, Zepf, Stephen E, Rhode, Katherine L

“…Globular star clusters contain thousands to millions of old stars packed within a region only tens of light years across. Their high stellar densities make it…”
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Globular cluster ultraluminous X-ray sources in the furthest early-type galaxies by Thygesen, Erica, Sun, Yifan, Huang, Jeff, Dage, Kristen C, Zepf, Stephen E, Kundu, Arunav, Haggard, Daryl, Maccarone, Thomas J

“…Ultraluminous X-ray sources (ULXs) in globular clusters (GCs) are low-mass X-ray binaries that achieve high X-ray luminosities through a currently uncertain…”
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X-ray spectroscopy of newly identified ULXs associated with M87’s globular cluster population by Dage, Kristen C, Zepf, Stephen E, Thygesen, Erica, Bahramian, Arash, Kundu, Arunav, Maccarone, Thomas J, Peacock, Mark B, Strader, Jay

“…We have identified seven ultraluminous X-ray sources (ULXs) that are coincident with globular cluster candidates (GC) associated with M87. ULXs in the old GC…”
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An extreme ultra-compact X-ray binary in a globular cluster: multiwavelength observations of RZ 2109 explored in a triple system framework by Dage, Kristen C, Bahramian, Arash, Naoz, Smadar, Bobrick, Alexey, Athukoralalage, Wasundara, Brumback, McKinley C, Haggard, Daryl, Kundu, Arunav, Zepf, Stephen E

“…ABSTRACT The globular cluster ultraluminous X-ray source, RZ 2109, is a complex and unique system that has been detected at X-ray, ultraviolet, and optical…”
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X-Ray Variability from the Ultraluminous Black Hole Candidate X-Ray Binary in the Globular Cluster RZ 2109 by Dage, Kristen C., Zepf, Stephen E., Bahramian, Arash, Kundu, Arunav, Maccarone, Thomas J., Peacock, Mark B.

“…We present the results of long-term monitoring of the X-ray emission from the ultraluminous X-ray source XMMU J122939.9+075333 in the extragalactic globular…”
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The X-ray point source population hosted by globular clusters in the elliptical galaxy NGC 4261 by Nair, Sneha, Dage, Kristen C, Haggard, Daryl, Kundu, Arunav, Plotkin, Richard M, Rhode, Katherine L, Zepf, Stephen E

“…ABSTRACT Utilizing archival Chandra X-ray Observatory data and Hubble Space Telescope globular cluster catalogues, we probe the time-domain properties of the…”
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X-ray spectral variability of ultraluminous X-ray sources in extragalactic globular clusters by Dage, Kristen C, Zepf, Stephen E, Peacock, Mark B, Bahramian, Arash, Noroozi, Omid, Kundu, Arunav, Maccarone, Thomas J

“…ABSTRACT A number of ultraluminous X-ray sources (ULXs) are physically associated with extragalactic globular clusters (GCs). We undertake a systematic X-ray…”
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Spectroscopy of Globular Clusters out to Large Radius in the Sombrero Galaxy by Bridges, Terry J, Rhode, Katherine L, Zepf, Stephen E, Freeman, Ken C

“…We present new velocities for 62 globular clusters in M104 (NGC 4594, the Sombrero Galaxy), 56 from 2dF on the AAT and 6 from Hydra on WIYN. Combined with…”
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Ultraluminous X-ray sources in seven edge-on spiral galaxies by Dage, Kristen C, Vowell, Noah, Thygesen, Erica, Bahramian, Arash, Haggard, Daryl, Kovlakas, Konstantinos, Kundu, Arunav, Maccarone, Thomas J, Strader, Jay, Urquhart, Ryan, Zepf, Stephen E

“…ABSTRACT We investigate a sample of seven edge-on spiral galaxies using Chandra observations. Edge-on spiral galaxies allow us to clearly separate source…”
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Optical and X-ray follow-up to a globular cluster ultraluminous X-ray source in NGC 4472 by Athukoralalage, Wasundara Ranhari, Dage, Kristen C, Zepf, Stephen E, Bahramian, Arash, Cackett, Edward M, Kundu, Arunav, Maccarone, Thomas J

“…NGC 4472 is home to five ultraluminous X-ray sources hosted by globular clusters. These sources have been suggested as good black hole candidates in…”
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Using machine learning to identify extragalactic globular cluster candidates from ground-based photometric surveys of M87 by Barbisan, Emilia, Huang, Jeff, Dage, Kristen C, Haggard, Daryl, Arnason, Robin, Bahramian, Arash, Clarkson, William I, Kundu, Arunav, Zepf, Stephen E

“…ABSTRACT Globular clusters (GCs) have been at the heart of many longstanding questions in many sub-fields of astronomy and, as such, systematic identification…”
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