SIMBAD references

2017MNRAS.472.2280F - Mon. Not. R. Astron. Soc., 472, 2280-2288 (2017)

A (likely) X-ray jet from NGC6217 observed by XMM-Newton.

FALOCCO S., LARSSON J. and NANDI S.

Abstract (from CDS):

NGC6217 is a nearby spiral galaxy with a starburst region near its centre. Evidence for a low-luminosity Active Galactic Nucleus (AGN) in its core has also been found in optical spectra. Intriguingly, X-ray observations by ROSAT revealed three knots aligned with the galaxy centre, resembling a jet structure. This paper presents a study of XMM-Newton observations made to assess the hypothesis of a jet emitted from the centre of NGC6217. The XMM data confirm the knots found with ROSAT and our spectral analysis shows that they have similar spectral properties with a hard photon index G ∼ 1.7. The core of NGC6217 is well fitted by a model with an AGN and a starburst component, where the AGN contributes at most 46 per cent of the total flux. The candidate jet has an apparent length ∼15 kpc and a luminosity of ∼5 x 1038 erg s^- 1^. It stands out by being hosted by a spiral galaxy, since jets are more widely associated with ellipticals. To explain the jet launching mechanism we consider the hypothesis of an advection dominated accretion flow with a low accretion rate. The candidate jet emitted from NGC6217 is intriguing since it represents a challenge to the current knowledge of the connection between AGN, jets and host galaxies.

Abstract Copyright: 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: jets - galaxies: nuclei - galaxies: spiral

Nomenclature: Table 2: [FLN2017] NGC 6217 knotN (Nos 1-3).

Status in Simbad:  being processed

Simbad objects: 9

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2019.10.24-07:50:16

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