A low-mass stellar companion of the planet host star HD 75289

M. Mugrauer; R. Neuhäuser; T. Mazeh; J. Alves; E. Guenther

doi:10.1051/0004-6361:20041009

A low-mass stellar companion of the planet host star HD 75289

M. Mugrauer, R. Neuhäuser, T. Mazeh, J. Alves, E. Guenther

Department of Astrophysics

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

We report on the detection of a new low-mass stellar companion of HD 75289, a G0V star that harbors one known radial-velocity planet (Udry et al. \cite{Udry00}, A&A, 356, 590). Comparing an image from 2MASS with an image we obtained with SofI at the ESO 3.58 m NTT three years later, we detected a co-moving companion located 21.465±0.023 arcsec (621±10 AU at 29 pc) east of HD 75289. A second SofI image taken 10 months later confirmed the common proper motion of HD 75289 B with its host star. The infrared spectrum and colors of the companion are consistent with an M 2 to M 5 main-sequence star at the distance of HD 75289. No further (sub)stellar companion down to H=19 mag could be detected. With the SofI detection limit we can rule out additional stellar companions beyond 140 AU and substellar companions with masses m≥0.050 M⊙ from 400 AU up to 2000 AU. Based on observations obtained on La Silla in ESO programs 68.C-008 and 70.C-0116(A).

Original language	English
Pages (from-to)	249-253
Journal	Astronomy & Astrophysics
Volume	425
DOIs	https://doi.org/10.1051/0004-6361:20041009
Publication status	Published - 1 Oct 2004

Keywords

stars: low-mass
brown dwarfs
stars: planetary systems

Access to Document

10.1051/0004-6361:20041009

http://adsabs.harvard.edu/abs/2004A%26A...425..249M

Cite this

@article{d8613da552be483086e29ec97a66edbc,

title = "A low-mass stellar companion of the planet host star HD 75289",

abstract = "We report on the detection of a new low-mass stellar companion of HD 75289, a G0V star that harbors one known radial-velocity planet (Udry et al. \cite{Udry00}, A&A, 356, 590). Comparing an image from 2MASS with an image we obtained with SofI at the ESO 3.58 m NTT three years later, we detected a co-moving companion located 21.465±0.023 arcsec (621±10 AU at 29 pc) east of HD 75289. A second SofI image taken 10 months later confirmed the common proper motion of HD 75289 B with its host star. The infrared spectrum and colors of the companion are consistent with an M 2 to M 5 main-sequence star at the distance of HD 75289. No further (sub)stellar companion down to H=19 mag could be detected. With the SofI detection limit we can rule out additional stellar companions beyond 140 AU and substellar companions with masses m≥0.050 M⊙ from 400 AU up to 2000 AU. Based on observations obtained on La Silla in ESO programs 68.C-008 and 70.C-0116(A).",

keywords = "stars: low-mass, brown dwarfs, stars: planetary systems",

author = "M. Mugrauer and R. Neuh{\"a}user and T. Mazeh and J. Alves and E. Guenther",

year = "2004",

month = oct,

day = "1",

doi = "10.1051/0004-6361:20041009",

language = "English",

volume = "425",

pages = "249--253",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP SCIENCES S A",

}

TY - JOUR

T1 - A low-mass stellar companion of the planet host star HD 75289

AU - Mugrauer, M.

AU - Neuhäuser, R.

AU - Mazeh, T.

AU - Alves, J.

AU - Guenther, E.

PY - 2004/10/1

Y1 - 2004/10/1

N2 - We report on the detection of a new low-mass stellar companion of HD 75289, a G0V star that harbors one known radial-velocity planet (Udry et al. \cite{Udry00}, A&A, 356, 590). Comparing an image from 2MASS with an image we obtained with SofI at the ESO 3.58 m NTT three years later, we detected a co-moving companion located 21.465±0.023 arcsec (621±10 AU at 29 pc) east of HD 75289. A second SofI image taken 10 months later confirmed the common proper motion of HD 75289 B with its host star. The infrared spectrum and colors of the companion are consistent with an M 2 to M 5 main-sequence star at the distance of HD 75289. No further (sub)stellar companion down to H=19 mag could be detected. With the SofI detection limit we can rule out additional stellar companions beyond 140 AU and substellar companions with masses m≥0.050 M⊙ from 400 AU up to 2000 AU. Based on observations obtained on La Silla in ESO programs 68.C-008 and 70.C-0116(A).

AB - We report on the detection of a new low-mass stellar companion of HD 75289, a G0V star that harbors one known radial-velocity planet (Udry et al. \cite{Udry00}, A&A, 356, 590). Comparing an image from 2MASS with an image we obtained with SofI at the ESO 3.58 m NTT three years later, we detected a co-moving companion located 21.465±0.023 arcsec (621±10 AU at 29 pc) east of HD 75289. A second SofI image taken 10 months later confirmed the common proper motion of HD 75289 B with its host star. The infrared spectrum and colors of the companion are consistent with an M 2 to M 5 main-sequence star at the distance of HD 75289. No further (sub)stellar companion down to H=19 mag could be detected. With the SofI detection limit we can rule out additional stellar companions beyond 140 AU and substellar companions with masses m≥0.050 M⊙ from 400 AU up to 2000 AU. Based on observations obtained on La Silla in ESO programs 68.C-008 and 70.C-0116(A).

KW - stars: low-mass

KW - brown dwarfs

KW - stars: planetary systems

U2 - 10.1051/0004-6361:20041009

DO - 10.1051/0004-6361:20041009

M3 - Article

SN - 0004-6361

VL - 425

SP - 249

EP - 253

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

ER -

A low-mass stellar companion of the planet host star HD 75289

Abstract

Keywords

Access to Document

Fingerprint

Cite this