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The proposed giant planet orbiting VB 10 does not exist

Bean, Jacob L.; Seifahrt, Andreas; Hartman, Henrik LU ; Nilsson, Hampus LU ; Reiners, Ansgar; Dreizler, Stefan; Henry, Todd J. and Wiedemann, Guenter (2010) In Astrophysical Journal Letters 711(1). p.19-23
Abstract
We present high-precision relative radial velocities of the very low mass star VB 10 that were obtained over a time span of 0.61 years as part of an ongoing search for planets around stars at the end of the main sequence. The radial velocities were measured from high-resolution near-infrared spectra obtained using the CRIRES instrument on the Very Large Telescope with an ammonia gas cell. The typical internal precision of the measurements is 10 m s(-1). These data do not exhibit significant variability and are essentially constant at a level consistent with the measurement uncertainties. Therefore, we do not detect the radial velocity variations of VB 10 expected due to the presence of an orbiting giant planet similar to that recently... (More)
We present high-precision relative radial velocities of the very low mass star VB 10 that were obtained over a time span of 0.61 years as part of an ongoing search for planets around stars at the end of the main sequence. The radial velocities were measured from high-resolution near-infrared spectra obtained using the CRIRES instrument on the Very Large Telescope with an ammonia gas cell. The typical internal precision of the measurements is 10 m s(-1). These data do not exhibit significant variability and are essentially constant at a level consistent with the measurement uncertainties. Therefore, we do not detect the radial velocity variations of VB 10 expected due to the presence of an orbiting giant planet similar to that recently proposed by Pravdo & Shaklan based on apparent astrometric perturbations. In addition, we do not confirm the similar to 1 km s(-1) radial velocity variability of the star tentatively detected by Zapatero Osorio and colleagues with lower precision measurements. Our measurements rule out planets with M-p > 3 M-Jup and the orbital period and inclination suggested by Pravdo & Shaklan at better than 5 sigma confidence. We conclude that the planet detection claimed by Pravdo & Shaklan is spurious on the basis of this result. Although the outcome of this work is a non-detection, it illustrates the potential of using ammonia cell radial velocities to detect planets around very low mass stars. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
planetary systems, stars: individual (GJ 752B)
in
Astrophysical Journal Letters
volume
711
issue
1
pages
19 - 23
publisher
University of Chicago Press
external identifiers
  • wos:000275361700004
  • scopus:77949518256
ISSN
2041-8213
DOI
10.1088/2041-8205/711/1/L19
language
English
LU publication?
yes
id
f18182c7-7a8a-49ae-b20c-efcdcd8cf9bd (old id 1589195)
date added to LUP
2010-04-20 13:10:12
date last changed
2018-06-24 03:15:27
@article{f18182c7-7a8a-49ae-b20c-efcdcd8cf9bd,
  abstract     = {We present high-precision relative radial velocities of the very low mass star VB 10 that were obtained over a time span of 0.61 years as part of an ongoing search for planets around stars at the end of the main sequence. The radial velocities were measured from high-resolution near-infrared spectra obtained using the CRIRES instrument on the Very Large Telescope with an ammonia gas cell. The typical internal precision of the measurements is 10 m s(-1). These data do not exhibit significant variability and are essentially constant at a level consistent with the measurement uncertainties. Therefore, we do not detect the radial velocity variations of VB 10 expected due to the presence of an orbiting giant planet similar to that recently proposed by Pravdo & Shaklan based on apparent astrometric perturbations. In addition, we do not confirm the similar to 1 km s(-1) radial velocity variability of the star tentatively detected by Zapatero Osorio and colleagues with lower precision measurements. Our measurements rule out planets with M-p > 3 M-Jup and the orbital period and inclination suggested by Pravdo & Shaklan at better than 5 sigma confidence. We conclude that the planet detection claimed by Pravdo & Shaklan is spurious on the basis of this result. Although the outcome of this work is a non-detection, it illustrates the potential of using ammonia cell radial velocities to detect planets around very low mass stars.},
  author       = {Bean, Jacob L. and Seifahrt, Andreas and Hartman, Henrik and Nilsson, Hampus and Reiners, Ansgar and Dreizler, Stefan and Henry, Todd J. and Wiedemann, Guenter},
  issn         = {2041-8213},
  keyword      = {planetary systems,stars: individual (GJ 752B)},
  language     = {eng},
  number       = {1},
  pages        = {19--23},
  publisher    = {University of Chicago Press},
  series       = {Astrophysical Journal Letters},
  title        = {The proposed giant planet orbiting VB 10 does not exist},
  url          = {http://dx.doi.org/10.1088/2041-8205/711/1/L19},
  volume       = {711},
  year         = {2010},
}