X-ray emission from the nucleus of the dwarf elliptical galaxy NGC 3226

I. M. George*, R. F. Mushotzky, T. Yaqoob, T. J. Turner, S. Kraemer, A. F. Ptak, K. Nandra, D. M. Crenshaw, H. Netzer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

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 languageEnglish
Pages (from-to)167-172
Number of pages6
JournalAstrophysical Journal
Volume559
Issue number1 PART 1
DOIs
StatePublished - 20 Sep 2001

Keywords

  • Galaxies: active
  • Galaxies: dwarf
  • Galaxies: individual (NGC 3226)
  • Galaxies: nuclei
  • X-rays: binaries
  • X-rays: galaxies

Fingerprint

Dive into the research topics of 'X-ray emission from the nucleus of the dwarf elliptical galaxy NGC 3226'. Together they form a unique fingerprint.

Cite this