Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG

M. G. Watson; T. P. Roberts; M. Akiyama; Y. Ueda

doi:10.1051/0004-6361:20053060

Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG

M. G. Watson, T. P. Roberts, M. Akiyama, Y. Ueda

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

We report the serendipitous discovery of several unresolved X-ray sources lying in the prominent spiral arms of the galaxy KUG 0214-057 in XMM-Newton observations. The location of these X-ray sources strongly suggests that at least three, and possibly four, of these may be physically related to the galaxy. The luminosity of each of these sources at the distance of KUG 0214-057 is >5 × 10³⁹ erg s^-1 (0.3-10 keV), making each a strong candidate ultraluminous X-ray source (ULX). Using the ULXs objects as a metric implies that this relatively low-mass galaxy may be experiencing rather intense starburst activity. The serendipitous discovery of these ULXs objects suggests that such objects are not a negligible component of the overall extragalactic X-ray source population.

Original language	English
Pages (from-to)	899-904
Number of pages	6
Journal	Astronomy and Astrophysics
Volume	437
Issue number	3
DOIs	https://doi.org/10.1051/0004-6361:20053060
Publication status	Published - 2005 Jul
Externally published	Yes

Keywords

Galaxies: starburst
X-rays: galaxies

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1051/0004-6361:20053060

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title = "Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG",

abstract = "We report the serendipitous discovery of several unresolved X-ray sources lying in the prominent spiral arms of the galaxy KUG 0214-057 in XMM-Newton observations. The location of these X-ray sources strongly suggests that at least three, and possibly four, of these may be physically related to the galaxy. The luminosity of each of these sources at the distance of KUG 0214-057 is >5 × 1039 erg s-1 (0.3-10 keV), making each a strong candidate ultraluminous X-ray source (ULX). Using the ULXs objects as a metric implies that this relatively low-mass galaxy may be experiencing rather intense starburst activity. The serendipitous discovery of these ULXs objects suggests that such objects are not a negligible component of the overall extragalactic X-ray source population.",

keywords = "Galaxies: starburst, X-rays: galaxies",

author = "Watson, {M. G.} and Roberts, {T. P.} and M. Akiyama and Y. Ueda",

year = "2005",

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doi = "10.1051/0004-6361:20053060",

language = "English",

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pages = "899--904",

journal = "Astronomy and Astrophysics",

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TY - JOUR

T1 - Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG

AU - Watson, M. G.

AU - Roberts, T. P.

AU - Akiyama, M.

AU - Ueda, Y.

PY - 2005/7

Y1 - 2005/7

N2 - We report the serendipitous discovery of several unresolved X-ray sources lying in the prominent spiral arms of the galaxy KUG 0214-057 in XMM-Newton observations. The location of these X-ray sources strongly suggests that at least three, and possibly four, of these may be physically related to the galaxy. The luminosity of each of these sources at the distance of KUG 0214-057 is >5 × 1039 erg s-1 (0.3-10 keV), making each a strong candidate ultraluminous X-ray source (ULX). Using the ULXs objects as a metric implies that this relatively low-mass galaxy may be experiencing rather intense starburst activity. The serendipitous discovery of these ULXs objects suggests that such objects are not a negligible component of the overall extragalactic X-ray source population.

AB - We report the serendipitous discovery of several unresolved X-ray sources lying in the prominent spiral arms of the galaxy KUG 0214-057 in XMM-Newton observations. The location of these X-ray sources strongly suggests that at least three, and possibly four, of these may be physically related to the galaxy. The luminosity of each of these sources at the distance of KUG 0214-057 is >5 × 1039 erg s-1 (0.3-10 keV), making each a strong candidate ultraluminous X-ray source (ULX). Using the ULXs objects as a metric implies that this relatively low-mass galaxy may be experiencing rather intense starburst activity. The serendipitous discovery of these ULXs objects suggests that such objects are not a negligible component of the overall extragalactic X-ray source population.

KW - Galaxies: starburst

KW - X-rays: galaxies

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DO - 10.1051/0004-6361:20053060

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JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

IS - 3

ER -

Discovery of multiple ultra-luminous X-ray sources in the galaxy KUG

Abstract

Keywords

ASJC Scopus subject areas

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