Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Adrienne M. Juett"'
Autor:
J. H. Croston, Andrés Jordán, William E. Harris, Gregory R. Sivakoff, R. P. Kraft, Adrienne M. Juett, Craig L. Sarazin, P. E. J. Nulsen, Daniel A. Evans, J. L. Goodger, Martin J. Hardcastle, S. S. Murray, Diana M Worrall, William R. Forman, Mark Birkinshaw, Somak Raychaudhury, C. Jones, Nicola Brassington, Kristin A. Woodley
Publikováno v:
The Astrophysical Journal. 677:L97-L100
We present preliminary results from a deep (600 ks) {\em Chandra} observation of the hot interstellar medium of the nearby early-type galaxy Centaurus A (Cen A). We find a surface brightness discontinuity in the gas $\sim$3.5 kpc from the nucleus spa
Autor:
William E. Harris, Gregory R. Sivakoff, Kristin A. Woodley, Andrés Jordán, Adrienne M. Juett, Martin J. Hardcastle, Craig L. Sarazin, Daniel A. Evans, William R. Forman, Diana M Worrall, Nicola Brassington, Ralph P. Kraft, Somak Raychaudhury, Mark Birkinshaw, Judith H. Croston, Stephen S. Murray, Christine Jones
Publikováno v:
The Astrophysical Journal. 677:L27-L30
We report the discovery of a bright transient X-ray source, CXOU J132518.2-430304, towards Centaurus A (Cen A) using six new Chandra X-Ray Observatory observations in 2007 March--May. Between 2003 and 2007, its flux has increased by a factor of >770.
Autor:
Christine Jones, William E. Harris, Gregory R. Sivakoff, Daniel A. Evans, Andrés Jordán, Somak Raychaudhury, Paul Nulsen, Stephen S. Murray, Martin J. Hardcastle, Nicola Brassington, Diana M Worrall, William R. Forman, Adrienne M. Juett, Mark Birkinshaw, Judith H. Croston, Craig L. Sarazin, Kristin A. Woodley, Ralph P. Kraft
Publikováno v:
The Astrophysical Journal. 673:L135-L138
We report an X-ray spectral study of the transverse structure of the Centaurus A jet using new data from the Chandra Cen A Very Large Project. We find that the spectrum steepens with increasing distance from the jet axis, and that this steepening can
Autor:
Stephen S. Murray, Gregory R. Sivakoff, Andrés Jordán, William E. Harris, Kristin A. Woodley, Martin J. Hardcastle, Mark Birkinshaw, Daniel A. Evans, Craig L. Sarazin, William R. Forman, Nicola Brassington, Adrienne M. Juett, Diana M Worrall, Judith H. Croston, Christine Jones, J. L. Goodger, Ralph P. Kraft, Somak Raychaudhury, Paul Nulsen
Publikováno v:
University of Bristol-PURE
We present new deep Chandra observations of the Centaurus A jet, with a combined on-source exposure time of 719 ks. These data allow detailed X-ray spectral measurements to be made along the jet out to its disappearance at 4.5 kpc from the nucleus. W
Publikováno v:
The Astrophysical Journal. 660:605-614
[abridged] We report results from four recent observations of the ultracompact LMXB pulsar 4U 1626-67. All the observations obtained high-resolution X-ray spectra of the system, two from the Chandra X-ray Observatory using the HETGS, and two from the
Publikováno v:
Proceedings of the International Astronomical Union. 1:210-214
Chandra observations of early-type galaxies have resolved large populations of low-mass X-ray binaries (LMXBs) in early-type galaxies. The majority of these observations have been snapshots on the order of a day or less. In our own Galaxy, LMXBs are
Autor:
Adrienne M. Juett
Publikováno v:
The Astrophysical Journal. 621:L25-L28
We show that the observed relationship between the fraction of low-mass X-ray binaries (LMXBs) found in globular clusters (GCs) and the GC-specific frequency for early-type galaxies is consistent with an LMXB formation model in which the field popula
Publikováno v:
The Astrophysical Journal. 612:308-318
(Abbrev.) We present high-resolution spectroscopy of the oxygen K-shell interstellar absorption edge in 7 X-ray binaries using the HETGS onboard Chandra. Using the brightest sources as templates, we found a best-fit model of 2 absorption edges and 5
Publikováno v:
The Astrophysical Journal. 573:789-793
We have measured the precise position of the 38-s eclipsing X-ray pulsar OAO 1657-415 with the Chandra X-Ray Observatory: RA = 17h00m48.90s, Dec = -41d39m21.6s, equninox J2000, error radius = 0.5 arcsec. Based on the previously measured pulsar mass f
Publikováno v:
The Astrophysical Journal. 568:L31-L34
We report on a 25 ks observation of the 8.7 s anomalous X-ray pulsar 4U~0142+61 with the High Energy Transmission Grating Spectrometer (HETGS) on the Chandra X-ray Observatory. The continuum spectrum is consistent with previous measurements and is we