Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Kilgard, R."'
Autor:
Prestwich, A. H., Linden, J. L. Galache. T., Kalogara, V., Zezas, A., Roberts, T. P., Kilgard, R., Wolter, A., Trinchieri, G.
Publikováno v:
2012ApJ...747..150P
In this paper we report on Chandra observations of the starburst galaxy NGC 922. NGC 922 is a drop-through ring galaxy with an expanding ring of star formation, similar in many respects to the Cartwheel galaxy. The Cartwheel galaxy is famous for host
Externí odkaz:
http://arxiv.org/abs/1212.1124
Publikováno v:
Astrophys.J.705:1632-1636,2009
X-ray sources in spiral galaxies can be approximately classified into bulge and disk populations. The bulge (or hard) sources have X-ray colors which are consistent with Low Mass X-ray Binaries (LMXB) but the the disk sources have softer colors sugge
Externí odkaz:
http://arxiv.org/abs/0909.0741
Autor:
Prestwich, A. H., Kilgard, R., Crowther, P. A., Carpano, S., Pollock, A. M. T., Zezas, A., Saar, S. H., Roberts, T. P., Ward, M. J.
IC 10 X-1 is a bright (Lx=10^38 ergs/s) variable X-ray source in the local group starburst galaxy IC 10. The most plausible optical counterpart is a luminous Wolf-Rayet star, making IC 10 X-1 a rare example of a Wolf-Rayet X-ray binary. In this paper
Externí odkaz:
http://arxiv.org/abs/0709.2892
Publikováno v:
Astron.J.133:2559-2568,2007
We report the analysis of deep radio observations of the interacting galaxy system M51 from the Very Large Array, with the goal of understanding the nature of the population of compact radio sources in nearby spiral galaxies. We detect 107 compact ra
Externí odkaz:
http://arxiv.org/abs/astro-ph/0702310
Publikováno v:
Mon.Not.Roy.Astron.Soc.371:1877-1890,2006
We report the results of a 2-month campaign conducted with the Chandra X-ray observatory to monitor the ultraluminous X-ray source (ULX) NGC 5204 X-1. This was composed of a 50-ks observation, followed by ten 5-ks follow-ups spaced initially at ~ 3,
Externí odkaz:
http://arxiv.org/abs/astro-ph/0607377
Autor:
Maddox, L. A., Cowan, J. J., Kilgard, R. E., Lacey, C. K., Prestwich, A. H., Stockdale, C. J., Wolfing, E.
Publikováno v:
Astron.J.132:310-320,2006
We present analyses of deep radio observations of M83 taken with the Very Large Array spanning fifteen years, including never before published observations from 1990 and 1998. We report on the evolution of 55 individual point sources, which include f
Externí odkaz:
http://arxiv.org/abs/astro-ph/0603850
Autor:
Polletta, M., Wilkes, B. J., Siana, B., Lonsdale, C. J., Kilgard, R., Smith, H. E., Kim, D. -W., Owen, F., Efstathiou, A., Jarrett, T., Stacey, G., Franceschini, A., Rowan-Robinson, M., Babbedge, T. S. R., Berta, S., Fang, F., Farrah, D., Gonzalez-Solares, E., Morrison, G., Surace, J. A., Shupe, D. L.
Publikováno v:
Astrophys.J.642:673-693,2006
Using the large multi-wavelength data set in the chandra/SWIRE Survey (0.6 square degrees in the Lockman Hole), we show evidence for the existence of highly obscured (Compton-thick) AGN, estimate a lower limit to their surface density and characteriz
Externí odkaz:
http://arxiv.org/abs/astro-ph/0602228
Autor:
Stockdale, C. J., Maddox, L. A., Cowan, J. J., Prestwich, A., Kilgard, R., Immler, S., Krauss, M.
Publikováno v:
Astron.J.131:889-894,2006
We report the results of 15 years of radio observations of the six historical supernovae (SNe) in M83 using the Very Large Array. We note the near linear decline in radio emission from SN 1957D, a type II SN, which remains a non-thermal radio emitter
Externí odkaz:
http://arxiv.org/abs/astro-ph/0511202
Publikováno v:
Astrophys.J. 630 (2005) 228-237
Ultraluminous X-ray sources (ULXs) have been described variously as the most luminous normal X-ray binaries, as hypernovae, and as "intermediate-mass" black holes with masses of hundreds to thousands of solar masses. We present results on M74 X-1 (CX
Externí odkaz:
http://arxiv.org/abs/astro-ph/0505260
Publikováno v:
Mon.Not.Roy.Astron.Soc. 357 (2005) 401-419
We present the global X-ray properties of the point source population in the grand-design spiral galaxy M101, as seen with XMM-Newton. 108 X-ray sources are detected within the D25 ellipse of M101, of which ~24 are estimated to be background sources.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0411535