X-ray detection of the cluster containing the Cepheid S Mus

Nancy Remage Evans; Ignazio Pillitteri; Scott Wolk; Edward Guinan; Scott Engle; Howard E. Bond; Gail H. Schaefer; Margarita Karovska; Joseph Depasquale; Evan Tingle

doi:10.1088/2041-8205/785/2/L25

X-ray detection of the cluster containing the Cepheid S Mus

Nancy Remage Evans, Ignazio Pillitteri, Scott Wolk, Edward Guinan, Scott Engle, Howard E. Bond, Gail H. Schaefer, Margarita Karovska, Joseph Depasquale, Evan Tingle

Astronomy & Astrophysics

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Abstract

The galactic Cepheid S Muscae has recently been added to the important list of Cepheids linked to open clusters, in this case the sparse young cluster ASCC 69. Low-mass members of a young cluster are expected to have rapid rotation and X-ray activity, making X-ray emission an excellent way to discriminate them from old field stars. We have made an XMM-Newton observation centered on S Mus and identified a population of X-ray sources whose near-IR Two Micron All Sky Survey counterparts lie at locations in the J, (J-K) color-magnitude diagram consistent with cluster membership at the distance of S Mus. Their median energy and X-ray luminosity are consistent with young cluster members as distinct from field stars. These strengthen the association of S Mus with the young cluster, making it a potential Leavitt law (period-luminosity relation) calibrator.

Original language	English (US)
Article number	L25
Journal	Astrophysical Journal Letters
Volume	785
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/785/2/L25
State	Published - Apr 20 2014

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/2041-8205/785/2/L25

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title = "X-ray detection of the cluster containing the Cepheid S Mus",

abstract = "The galactic Cepheid S Muscae has recently been added to the important list of Cepheids linked to open clusters, in this case the sparse young cluster ASCC 69. Low-mass members of a young cluster are expected to have rapid rotation and X-ray activity, making X-ray emission an excellent way to discriminate them from old field stars. We have made an XMM-Newton observation centered on S Mus and identified a population of X-ray sources whose near-IR Two Micron All Sky Survey counterparts lie at locations in the J, (J-K) color-magnitude diagram consistent with cluster membership at the distance of S Mus. Their median energy and X-ray luminosity are consistent with young cluster members as distinct from field stars. These strengthen the association of S Mus with the young cluster, making it a potential Leavitt law (period-luminosity relation) calibrator.",

author = "Evans, {Nancy Remage} and Ignazio Pillitteri and Scott Wolk and Edward Guinan and Scott Engle and Bond, {Howard E.} and Schaefer, {Gail H.} and Margarita Karovska and Joseph Depasquale and Evan Tingle",

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doi = "10.1088/2041-8205/785/2/L25",

language = "English (US)",

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T1 - X-ray detection of the cluster containing the Cepheid S Mus

AU - Evans, Nancy Remage

AU - Pillitteri, Ignazio

AU - Wolk, Scott

AU - Guinan, Edward

AU - Engle, Scott

AU - Bond, Howard E.

AU - Schaefer, Gail H.

AU - Karovska, Margarita

AU - Depasquale, Joseph

AU - Tingle, Evan

PY - 2014/4/20

Y1 - 2014/4/20

N2 - The galactic Cepheid S Muscae has recently been added to the important list of Cepheids linked to open clusters, in this case the sparse young cluster ASCC 69. Low-mass members of a young cluster are expected to have rapid rotation and X-ray activity, making X-ray emission an excellent way to discriminate them from old field stars. We have made an XMM-Newton observation centered on S Mus and identified a population of X-ray sources whose near-IR Two Micron All Sky Survey counterparts lie at locations in the J, (J-K) color-magnitude diagram consistent with cluster membership at the distance of S Mus. Their median energy and X-ray luminosity are consistent with young cluster members as distinct from field stars. These strengthen the association of S Mus with the young cluster, making it a potential Leavitt law (period-luminosity relation) calibrator.

AB - The galactic Cepheid S Muscae has recently been added to the important list of Cepheids linked to open clusters, in this case the sparse young cluster ASCC 69. Low-mass members of a young cluster are expected to have rapid rotation and X-ray activity, making X-ray emission an excellent way to discriminate them from old field stars. We have made an XMM-Newton observation centered on S Mus and identified a population of X-ray sources whose near-IR Two Micron All Sky Survey counterparts lie at locations in the J, (J-K) color-magnitude diagram consistent with cluster membership at the distance of S Mus. Their median energy and X-ray luminosity are consistent with young cluster members as distinct from field stars. These strengthen the association of S Mus with the young cluster, making it a potential Leavitt law (period-luminosity relation) calibrator.

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DO - 10.1088/2041-8205/785/2/L25

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VL - 785

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L25

ER -

X-ray detection of the cluster containing the Cepheid S Mus

Abstract

All Science Journal Classification (ASJC) codes

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