LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion

Todd R. Vaccaro; A. Kawka; T. D. Oswalt; I. Silver; M. Wood; J. Allyn Smith

LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion

Todd R. Vaccaro
, A. Kawka
, T. D. Oswalt
, I. Silver
, M. Wood
, J. Allyn Smith

St. Cloud State University
Astronomický ústav Akademie věd České republiky
Florida Institute of Technology - Melbourne
Austin Peay State University

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

Abstract

We report the discovery of the partially eclipsing binary LP 133-373. Nearly identical eclipses along with observed photometric colors and spectroscopy indicate that it is a pair of chromospherically active dM4 stars in a circular 1.6 day orbit. Light and velocity curve modeling to our differential photometry and velocity data show that each star has a mass and radius of 0.340+/-0.014 M _solar and 0.33+/-0.02 R _solar . The binary is itself part of a common proper motion pair with LP 133-374, a cool DC or possible DA white dwarf with a mass of 0.49-0.82 M _solar , which would make the system at least 3 Gyr old

Original language	American English
Journal	Astrophysical Journal
State	Published - Jun 1 2007
Externally published	Yes

Keywords

binaries: eclipsing
stars: activity
white dwarfs

Disciplines

Astrophysics and Astronomy
Stars, Interstellar Medium and the Galaxy

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LP 133-373 A New Chromospherically Active Eclipsing dMe Binary wFinal published version, 721 KBLicense: CC BY

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title = "LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion",

abstract = " We report the discovery of the partially eclipsing binary LP 133-373. Nearly identical eclipses along with observed photometric colors and spectroscopy indicate that it is a pair of chromospherically active dM4 stars in a circular 1.6 day orbit. Light and velocity curve modeling to our differential photometry and velocity data show that each star has a mass and radius of 0.340+/-0.014 M solar and 0.33+/-0.02 R solar . The binary is itself part of a common proper motion pair with LP 133-374, a cool DC or possible DA white dwarf with a mass of 0.49-0.82 M solar , which would make the system at least 3 Gyr old",

keywords = "binaries: eclipsing, stars: activity, white dwarfs",

author = "Vaccaro, \{Todd R.\} and A. Kawka and Oswalt, \{T. D.\} and I. Silver and M. Wood and Smith, \{J. Allyn\}",

year = "2007",

month = jun,

day = "1",

language = "American English",

journal = "Astrophysical Journal",

issn = "1538-4357",

publisher = "Institute of Physics Publishing, Inc.",

}

TY - JOUR

T1 - LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion

AU - Vaccaro, Todd R.

AU - Kawka, A.

AU - Oswalt, T. D.

AU - Silver, I.

AU - Wood, M.

AU - Smith, J. Allyn

PY - 2007/6/1

Y1 - 2007/6/1

N2 - We report the discovery of the partially eclipsing binary LP 133-373. Nearly identical eclipses along with observed photometric colors and spectroscopy indicate that it is a pair of chromospherically active dM4 stars in a circular 1.6 day orbit. Light and velocity curve modeling to our differential photometry and velocity data show that each star has a mass and radius of 0.340+/-0.014 M solar and 0.33+/-0.02 R solar . The binary is itself part of a common proper motion pair with LP 133-374, a cool DC or possible DA white dwarf with a mass of 0.49-0.82 M solar , which would make the system at least 3 Gyr old

AB - We report the discovery of the partially eclipsing binary LP 133-373. Nearly identical eclipses along with observed photometric colors and spectroscopy indicate that it is a pair of chromospherically active dM4 stars in a circular 1.6 day orbit. Light and velocity curve modeling to our differential photometry and velocity data show that each star has a mass and radius of 0.340+/-0.014 M solar and 0.33+/-0.02 R solar . The binary is itself part of a common proper motion pair with LP 133-374, a cool DC or possible DA white dwarf with a mass of 0.49-0.82 M solar , which would make the system at least 3 Gyr old

KW - binaries: eclipsing

KW - stars: activity

KW - white dwarfs

UR - https://repository.stcloudstate.edu/phys_facpubs/4

M3 - Article

SN - 1538-4357

JO - Astrophysical Journal

JF - Astrophysical Journal

ER -

LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion

Abstract

Keywords

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