A Mass for the Extrasolar Planet Gliese 876b Determined from Hubble Space Telescope Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities*

@article{Benedict2002AMF,
  title={A Mass for the Extrasolar Planet Gliese 876b Determined from Hubble Space Telescope Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities*},
  author={G. Benedict and B. Mcarthur and T. Forveille and X. Delfosse and E. Nelan and R. Butler and W. Spiesman and G. Marcy and B. Goldman and C. Perrier and W. Jefferys and M. Mayor},
  journal={The Astrophysical Journal},
  year={2002},
  volume={581}
}
We report the first astrometrically determined mass of an extrasolar planet, a companion previously detected by Doppler spectroscopy. Radial velocities first provided an ephemeris with which to schedule a significant fraction of the Hubble Space Telescope(HST) observations near companion peri- and apastron. The astrometry residuals at these orbital phases exhibit a systematic deviation consistent with a perturbation due to a planetary mass companion. Combining HST astrometry with radial… Expand

Figures and Tables from this paper

Precise Dynamical Masses of Directly Imaged Companions from Relative Astrometry, Radial Velocities, and Hipparcos-Gaia DR2 Accelerations
We measure dynamical masses for five objects--three ultracool dwarfs, one low-mass star, and one white dwarf--by fitting orbits to a combination of the Hipparcos-Gaia Catalog of Accelerations,Expand
The Mass of the Candidate Exoplanet Companion to HD 33636 from Hubble Space Telescope Astrometry and High-Precision Radial Velocities
We have determined a dynamical mass for the companion to HD 33636 which indicates it is a low-mass star instead of an exoplanet. Our result is based on an analysis of Hubble Space Telescope (HST)Expand
The HARPS search for southern extra-solar planets - XIX. Characterization and dynamics of the GJ 876 planetary system
Precise radial-velocity measurements for data acquired with the HARPS spectrograph infer that three planets orbit the M4 dwarf star GJ876. In particular, we confirm the existence of planet d, whichExpand
Astrometry, Radial Velocity, and Photometry: The HD 128311 System Remixed with Data from HST, HET, and APT
We have used high-cadence radial velocity measurements from the Hobby-Eberly Telescope with published velocities from the Lick 3 m Shane Telescope, combined with astrometric data from the HubbleExpand
The PRIMA astrometric planet search: goals and prospects
ESO's PRIMA (Phase-Referenced Imaging and Micro-arcsecond Astrometry) facility at the VLT Interferometer on Cerro Paranal in Chile is expected to be fully operational in only a couple of years fromExpand
Search for extrasolar planets with high-precision relative astrometry by ground-based and single-aperture observations
Abstract We present our search program for substellar companions using high-precision relative astronomy. Due to its orbital motion around the star, an unseen substellar companion would produce aExpand
A ~7.5 M⊕ Planet Orbiting the Nearby Star, GJ 876*
High-precision, high-cadence radial velocity monitoring over the past 8 yr at the W. M. Keck Observatory reveals evidence for a third planet orbiting the nearby (4.69 pc) dM4 star GJ 876. TheExpand
Direct Imaging of Extra-solar Planets - Homogeneous Comparison of Detected Planets and Candidates
Planets orbiting stars other than the Sun are called extra-solar planets or exo-planets. Since about 1989, several hundred such objects were detected using various techniques. The first companionsExpand
Hipparcos astrometric orbits for two brown dwarf companions: HD 38529 and HD 168443
Context. HD 38529 and HD 168443 have previously been identified as systems with two substellar companion candidates using precise radial velocity measurements. Aims. We want to further constrainExpand
Developing a ground-based search system for transits of extrasolar planets
The search for extrasolar planets is a relatively new field in astronomical and astrophysical sciences that was boosted by the first discovery of the exoplanet 51 Peg b in 1995 by radial velocityExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 22 REFERENCES
Astrometry with the Hubble Space Telescope: A Parallax of the Fundamental Distance Calibrator RR Lyrae
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator � Cep. We obtain these with astrometric data from FGS 3, a white-light interferometer on theExpand
Astrometry with Hubble Space Telescope: A Parallax of the Fundamental Distance Calibrator delta Cephei
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator, delta Cep. We obtain these with astrometric data from FGS 3, a white-light interferometer onExpand
A Planetary Companion to a Nearby M4 Dwarf, Gliese 876*
Doppler measurements of the M4 dwarf star Gliese 876 taken at both Lick and Keck Observatories reveal periodic, Keplerian velocity variations with a period of 61 days. The orbital fit implies thatExpand
Precise Masses for Wolf 1062 AB from Hubble Space Telescope Interferometric Astrometry and McDonald Observatory Radial Velocities
We present an analysis of astrometric data from Fine Guidance Sensor 3 (FGS 3), a white-light interferometer on HST , and of radial velocity data from two ground-based campaigns. We model theExpand
Interferometric Astrometry of Proxima Centauri and Barnard's Star Using HUBBLE SPACE TELESCOPE Fine Guidance Sensor 3: Detection Limits for Substellar Companions*
We report on a substellar-companion search utilizing interferometric fringe-tracking astrometry acquired with Fine Guidance Sensor 3 on the Hubble Space Telescope. Our targets were Proxima CentauriExpand
A Pair of Resonant Planets Orbiting GJ 876
Precise Doppler measurements during 6 yr from the Lick and Keck observatories reveal two planets orbiting GJ 876 (M4V). The orbital Ðt yields companion masses of M sin i \ 0.56 and 1.89 orbital M J ,Expand
A Transiting "51 Peg-like" Planet.
Doppler measurements from Keck exhibit a sinusoidal periodicity in the velocities of the G0 dwarf HD 209458, having a semiamplitude of 81 m s-1 and a period of 3.5239 days, which is indicative of aExpand
Dynamical Models of the Resonant Pair of Planets Orbiting the Star GJ 876
We present two planet fits to the radial velocity measurements of the M dwarf star GJ 876 that account for the mutual perturbations between the planets, as well as their interactions with the star.Expand
Re-processing the Hipparcos Transit Data and intermediate astrometric data of spectroscopic binaries: I. Ba, CH and Tc-poor S stars
Only 235 entries were processed as astrometric binaries with orbits in the Hipparcos and Tycho Catalogue (ESA 1997). However, the Intermediate Astrometric Data (IAD) and Transit Data (TD) madeExpand
The First US Naval Observatory CCD Astrograph Catalog
The USNO CCD Astrograph (UCA) started an astrometric survey in 1998 February at Cerro Tololo, Chile. This first, preliminary catalog (UCAC1) includes data taken up to 1999 November with about 80% ofExpand
...
1
2
3
...