Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Edmonds, Peter D."'
Autor:
Berg, Maureen van den, Sandoval, Liliana Rivera, Heinke, Craig O., Cohn, Haldan N., Lugger, Phyllis M., Grindlay, Jonathan E., Edmonds, Peter D., Anderson, Jay, Catuneanu, Andrei
We present simultaneous Chandra X-ray Observatory and Hubble Space Telescope observations of three certain (X5, X7, W37) and two likely (X4, W17) quiescent neutron-star low-mass X-ray binaries (qLMXBs) in the globular cluster 47 Tuc. We study these s
Externí odkaz:
http://arxiv.org/abs/2404.15504
Autor:
Engel, Megan C., Heinke, Craig O., Sivakoff, Gregory R., Elshamouty, Khaled G., Edmonds, Peter D.
We present a candidate orbital period for the low mass X-ray binary XB 1832-330 in the globular cluster NGC 6652 using a 6.5 hour Gemini South observation of the optical counterpart of the system. Light curves in g' and r' for two LMXBs in the cluste
Externí odkaz:
http://arxiv.org/abs/1201.4131
Autor:
Lugger, Phyllis M., Cohn, Haldan N., Heinke, Craig O., Grindlay, Jonathan E., Edmonds, Peter D.
Publikováno v:
Astrophys.J.657:286-301,2007
We report the detection of six discrete, low-luminosity (Lx < 10^33 erg/s) X-ray sources, located within 12 arcsec of the center of the collapsed-core globular cluster M30 (NGC 7099), and a total of 13 sources within the half-mass radius, from a 50 k
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606382
Autor:
Cackett, Edward M., Wijnands, Rudy, Heinke, Craig O., Edmonds, Peter D., Lewin, Walter H. G., Pooley, David, Grindlay, Jonathon E., Jonker, Peter G., Miller, Jon M.
Publikováno v:
Astrophys.J. 620 (2005) 922-928
The globular cluster NGC 6440 is known to harbor a bright neutron-star X-ray transient. We observed the globular cluster with Chandra on two occasions when the bright transient was in its quiescent state in July 2000 and June 2003 (both observations
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407448
Publikováno v:
Astrophys.J. 611 (2004) 413-417
We report the detection, with HST, of an optical counterpart to the transient supersoft X-ray source 1E 1339.8+2837, in the globular cluster M3. The counterpart is found near the faint end of the subgiant branch in the V vs V-I color magnitude diagra
Externí odkaz:
http://arxiv.org/abs/astro-ph/0404559
Autor:
Wijnands, Rudy, Heinke, Craig O., Pooley, David, Edmonds, Peter D., Lewin, Walter H. G., Grindlay, Jonathan E., Jonker, Peter G., Miller, Jon M.
Publikováno v:
Astrophys.J. 618 (2005) 883-890
We present a Chandra observation of the globular cluster Terzan 5 during times when the neutron-star X-ray transient EXO 1745-248 located in this cluster was in its quiescent state. We detected the quiescent system with a (0.5-10 keV) luminosity of ~
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310144
Publikováno v:
Astrophys.J.596:1197-1219,2003
We report time series and variability information for the optical identifications of X-ray sources in 47 Tuc reported in Paper I. The eight CVs with secure orbital periods have fainter accretion disks, in the V band, than field CVs with similar perio
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307189
Publikováno v:
Astrophys.J.596:1177-1196,2003
We report the largest number of optical identifications of X-ray sources yet obtained in a single globular cluster. Using deep Chandra/ACIS-I imaging and extensive HST studies with WFPC2, we have detected optical counterparts to at least 22 cataclysm
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307187
Autor:
Edmonds, Peter D.
Binary stars have long been considered to play a crucial role in globular cluster evolution, and offer the advantages of studying systems at the same, well-determined distances. However, early search attempts were consistently thwarted by crowding (p
Externí odkaz:
http://arxiv.org/abs/astro-ph/0210521
Autor:
Edmonds, Peter D., Gilliland, Ronald L., Camilo, Fernando, Heinke, Craig O., Grindlay, Jonathan E.
Using extensive HST imaging, combined with Chandra X-ray and Parkes radio data, we have detected the optical binary companion to a second millisecond pulsar (MSP) in the globular cluster 47 Tucanae. This faint (V=22.3) blue (V-I=0.7) star shows a lar
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207426