2017MNRAS.467.3788B -
Mon. Not. R. Astron. Soc., 467, 3788-3800 (2017/June-1)
Superwind evolution: the young starburst-driven wind galaxy NGC 2782.
BRAVO-GUERRERO J. and STEVENS I.R.
Abstract (from CDS):
We present results from a 30-ks Chandra observation of the important starburst galaxy NGC 2782, covering the 0.3-10 keV energy band. We find evidence of a superwind of small extent, which is likely in an early stage of development. We find a total of 27 X-ray point sources within a region of radius 2D25 of the galaxy centre and that are likely associated with the galaxy. Of these, 13 are ultraluminous X-ray point sources (ULXs; LX >= 1039 erg s^- 1^) and a number have likely counterparts. The X-ray luminosities of the ULX candidates are 1.2-3.9 x 1039 erg s^- 1^. NGC 2782 seems to have an unusually large number of ULXs. Central diffuse X-ray emission extending to ∼3 kpc from the nuclear region has been detected. We also find an X-ray structure to the south of the nucleus, coincident with Hα filaments and with a 5-GHz radio source. We interpret this as a blow-out region of a forming superwind. This X-ray bubble has a total luminosity (0.3-10 keV) of 5 x 1039 erg s–1 (around 15 per cent of the total luminosity of the extended emission), and an inferred wind mass of 1.5 x 106 M☉ . We also discuss the nature of the central X-ray source in NGC 2782, and conclude that it is likely a low-luminosity active galactic nucleus, with a total X-ray luminosity of LX = 6 x 1040 erg s–1, with strong Fe line emission at 6.4 keV.
Abstract Copyright:
© 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
Journal keyword(s):
galaxies: haloes - galaxies: individual: NGC 2782 - galaxies: ISM - galaxies: starburst - X-rays: galaxies - X-rays: galaxies
Nomenclature:
Fig. 5, Table 1: [BS2017] NN (Nos 1-45).
Status at CDS
:
All or part of tables of objects could be ingested in SIMBAD with priority 2.
Simbad objects:
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