Abstract
We present the first high-resolution X-ray image of the dwarf elliptical galaxy NGC 3226. The data were obtained during an observation of the nearby Seyfert Galaxy NGC 3227 using the Chandra X-Ray Observatory. We detect a point X-ray source spatially consistent with the optical nucleus of NGC 3226 and a recently detected, compact, flat-spectrum radio source. The X-ray spectrum can be measured up to ∼10 keV and is consistent with a power law with a photon index 1.7 ≲ Γ ≲; 2.2 or thermal bremsstrahlung emission with 4 keV ≲ kT ≲ 10 keV. In both cases, the luminosity in the 2-10 keV band ≃1040 h-175 ergs s-1. We find marginal evidence that the nucleus varies within the observation. These characteristics support evidence from other wave bands that NGC 3226 harbors a low-luminosity active nucleus. We also comment on two previously unknown, fainter X-ray sources ≲15″ from the nucleus of NGC 3226. Their proximity to the nucleus (with projected distances of ≲1.3 h-175 kpc) suggests both are within NGC 3226 and thus have luminosities (approximately a few times 1038 to a few times 1039 ergs s-1) consistent with black hole binary systems.
Original language | English |
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Pages (from-to) | 167-172 |
Number of pages | 6 |
Journal | Astrophysical Journal |
Volume | 559 |
Issue number | 1 PART 1 |
DOIs | |
State | Published - 20 Sep 2001 |
Keywords
- Galaxies: active
- Galaxies: dwarf
- Galaxies: individual (NGC 3226)
- Galaxies: nuclei
- X-rays: binaries
- X-rays: galaxies