Radio Identification of the X-ray Jet in the Z=4.3 Quasar Gb 1508+5714 C. C. Cheung

نویسنده

  • C. C. C HEUNG
چکیده

The recent discovery of an X-ray jet in the z=4.3 quasar GB 1508+5714 by Yuan et al. (astro-ph/0309318) and Siemiginowska et al. (astro-ph/0310241) prompted a search for its radio counterpart. Here, we report the successful discovery of faint radio emission from the jet at 1.4 GHz using archival VLA data. Possible interpretations of the X-ray jet as synchrotron or inverse Compton emission off the CMB as discussed by the previous investigators are revisited in light of the new radio detection. Subject headings: Galaxies: active — galaxies: jets — quasars: general — quasars: individual (GB 1508+5714) — radio continuum: galaxies — X-rays: galaxies

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Extended X - ray emission in the high redshift quasar GB 1508 + 5714 at z = 4 . 3

We report the discovery of extended X-ray emission around the powerful high-redshift quasar GB 1508+5714 at z=4.3, revealed in a long Chandra ACIS observation. The emission feature is 3–4 arcsec away from the quasar core, which corresponds to a projected distance of about 25 kpc. The X-ray spectrum is best fitted with a power law of photon index 1.92 ± 0.35 (90 per cent c.l.). The X-ray flux an...

متن کامل

Extended X - ray emission in the high redshift quasar GB 1508 + 5714

We report the discovery of extended X-ray emission around the powerful high-redshift quasar GB 1508+5714 at z=4.3, revealed in a long Chandra ACIS observation. The emission feature is 3–4 arcsec away from the quasar core, which corresponds to a projected distance of about 25 kpc. The X-ray spectrum is best fitted with a power law of photon index 1.92 ± 0.35 (90 per cent c.l.). The X-ray flux an...

متن کامل

THE 3–53 keV SPECTRUM OF THE QUASAR 1508+5714: X-RAYS FROM z = 4.3

We present a high-quality X-ray spectrum in the 3–53 keV rest-frame band of the radio-loud quasar 1508+5714, by far the brightest known X-ray source at z > 4. A simple power-law model with an absorption column density equal to the Galactic value in the direction of the source provides an excellent and fully adequate fit to the data; the measured power-law photon index Γ = 1.42 −0.10. Upper limi...

متن کامل

Serendipitous Discovery of an Extended X-ray Jet without a Radio Counterpart in a High-redshift Quasar

A recent Chandra observation of the nearby galaxy cluster Abell 585 has led to the discovery of an extended X-ray jet associated with the high-redshift background quasar B3 0727+409, a luminous radio source at redshift z = 2.5. This is one of only few examples of high-redshift X-ray jets known to date. It has a clear extension of about 12′′, corresponding to a projected length of ∼ 100 kpc, wit...

متن کامل

Work supported in part by Department of Energy contract DE-AC02-76SF00515 CONFRONTING X-RAY EMISSION MODELS WITH THE HIGHEST-REDSHIFT KILOPARSEC-SCALE JETS: THE Z=3.89 JET IN QUASAR 1745+624

A newly identified kiloparsec-scale X-ray jet in the high-redshift z=3.89 quasar 1745+624 is studied with multi-frequency Very Large Array, Hubble Space Telescope, and Chandra X-ray imaging data. This is only the third large-scale X-ray jet beyond z > 3 known and is further distinguished as being the most luminous relativistic jet observed at any redshift, exceeding 10 erg/s in both the radio a...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003