Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Burbidge, E. M."'
The aim is to investigate the region of the sky around NGC4410/Mrk1325 for objects which are physically associated with this active, double nucleus galaxy. We use archived data to study the placement, brightness, X-ray properties and redshifts of obj
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605453
It is shown that all of the 32 point X-ray sources which lie within about 10' of the centre of nearby galaxies, and which have so far been optically identified are high redshift objects - AGN or QSOs. Thus the surface density of these QSOs p similar
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605140
It is shown that there are at least 21 QSOs within 1 degree of the nearby active spiral galaxy NGC3079. Many of them are bright (mag<18) so that the surface density of those closer than 15 arc minutes to the galaxy centre is close to 100 times the av
Externí odkaz:
http://arxiv.org/abs/astro-ph/0510815
Autor:
Arp, H., Burbidge, E. M.
NGC 3079 is a very active, disturbed galaxy which has been observed to have X-ray and radio ejections from it as well as an optical superbubble along its minor axis. Here we show that the brightest X-ray sources within about 40 arcmin are in large ex
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504237
Autor:
Galianni, Pasquale, Burbidge, E. M., Arp, H., Junkkarinen, V., Burbidge, G., Zibetti, Stefano
Publikováno v:
Astrophys.J. 620 (2005) 88-94
A strong X-ray source only 8" from the nucleus of the Sy2 galaxy NGC 7319 in Stephan's Quintet has been discovered by Chandra. We have identified the optical counterpart and show it is a QSO with $z_e = 2.114$. It is also a ULX with $L_x = 1.5 x 10^{
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409215
Autor:
Junkkarinen, V. T., Cohen, Ross D., Beaver, E. A., Burbidge, E. M., Lyons, R. W., Madejski, G.
Publikováno v:
Astrophys.J. 614 (2004) 658-670
We present new HST STIS NUV-MAMA and STIS CCD observations of the BL Lac object AO 0235+164 and the intervening damped Ly alpha (DLA) line at z_a = 0.524. The line profile gives N(H I) = 5 +/- 1 x 10^{21} cm^{-2} and, combined with the H I 21 cm abso
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407281
Publikováno v:
Astron.Astrophys. 414 (2004) L37
The strong radio source 3C343.1 consists of a galaxy and a QSO separated by no more than about 0.25 arcsec. The chance of this being an accidental superposition is conservatively 10^-8. The z=0.344 galaxy is connected to the z=0.750 QSO by a radio br
Externí odkaz:
http://arxiv.org/abs/astro-ph/0401007
Autor:
Narayanan, Desika, Hamann, Fred, Barlow, Tom, Burbidge, E. M., Cohen, Ross D., Junkkarinen, Vesa, Lyons, Ron
Publikováno v:
Astrophys.J. 601 (2004) 715-722
Quasar spectra have a variety of absorption lines whose origins range from energetic winds expelled from the central engines to unrelated, intergalactic clouds. We present multi-epoch, medium resolution spectra of eight quasars at z~2 that have narro
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310469
Publikováno v:
Astrophys.J. 591 (2003) 690-694
The starburst / AGN galaxy M82 was studied by Dahlem, Weaver and Heckman using X-ray data from ROSAT and ASCA, as part of their X-ray survey of edge-on starburst galaxies. They found seventeen unresolved hard-X-ray sources around M82, in addition to
Externí odkaz:
http://arxiv.org/abs/astro-ph/0303625
Publikováno v:
Astron.Astrophys. 400 (2003) L17
It is suggested that many of the ultraluminous compact x-ray sources now being found in the main bodies of galaxies, particularly those that are active, like M82, NGC 3628 and others, are "local" QSOs, or BL Lac objects, with high intrinsic redshifts
Externí odkaz:
http://arxiv.org/abs/astro-ph/0211139