Abstract
Observations of NGC 6251 in the low-energy X-rays with the Position
Sensitive Proportional Counter on board ROSAT are reported. No X-ray
emission is seen from the 4.5-arcmin-long radio jet of this galaxy,
suggesting that the electron spectrum is cut off for electron energies
greater than 10 exp 12 eV, but a bright X-ray source is coincident with
the center of the galaxy. The power-law spectral indexes is close to the
HF radio spectral index of the VLBI core, supporting a
synchro-self-Compton model for this component of the X-ray emission. The
infall of material into the nucleus is sufficiently rapid to power the
mini-AGN component, if the mass of the central black hole exceeds 50,000
solar masses.
Original language | English |
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Pages (from-to) | 568-585 |
Journal | Astrophysical Journal |
Volume | 412 |
Issue number | 2 |
Publication status | Published - 1 Aug 1993 |
Keywords
- Astronomical Spectroscopy
- Galactic Nuclei
- Radio Jets (Astronomy)
- X Ray Sources
- Emission Spectra
- Galactic Radiation
- Proportional Counters