Superwind evolution: the young starburst-driven wind galaxy NGC 2782

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Superwind evolution : the young starburst-driven wind galaxy NGC 2782. / Bravo-guerrero, Jimena; Stevens, Ian R.

In: Royal Astronomical Society. Monthly Notices, Vol. 467, No. 4, 01.06.2017, p. 3788-3800.

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@article{d684136630da4181839e395569494a6c,
title = "Superwind evolution: the young starburst-driven wind galaxy NGC 2782",
abstract = "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 × 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 × 1039 erg s−1 (around 15 per cent of the total luminosity of the extended emission), and an inferred wind mass of 1.5 × 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 × 1040 erg s−1, with strong Fe line emission at 6.4 keV.",
keywords = "galaxies: haloes, galaxies: individual: NGC 2782, galaxies: ISM, galaxies: starburst, X-rays: galaxies",
author = "Jimena Bravo-guerrero and Stevens, {Ian R.}",
year = "2017",
month = jun,
day = "1",
doi = "10.1093/mnras/stx327",
language = "English",
volume = "467",
pages = "3788--3800",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "SIPRI/Oxford University Press",
number = "4",

}

RIS

TY - JOUR

T1 - Superwind evolution

T2 - the young starburst-driven wind galaxy NGC 2782

AU - Bravo-guerrero, Jimena

AU - Stevens, Ian R.

PY - 2017/6/1

Y1 - 2017/6/1

N2 - 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 × 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 × 1039 erg s−1 (around 15 per cent of the total luminosity of the extended emission), and an inferred wind mass of 1.5 × 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 × 1040 erg s−1, with strong Fe line emission at 6.4 keV.

AB - 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 × 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 × 1039 erg s−1 (around 15 per cent of the total luminosity of the extended emission), and an inferred wind mass of 1.5 × 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 × 1040 erg s−1, with strong Fe line emission at 6.4 keV.

KW - galaxies: haloes

KW - galaxies: individual: NGC 2782

KW - galaxies: ISM

KW - galaxies: starburst

KW - X-rays: galaxies

U2 - 10.1093/mnras/stx327

DO - 10.1093/mnras/stx327

M3 - Article

VL - 467

SP - 3788

EP - 3800

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -