The DOI matches its Crossref record.
A Mass for the Extrasolar Planet Gliese 876[CLC]b[/CLC] Determined from [ITAL]Hubble Space Telescope[/ITAL] Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities
Open accessAbstract
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 velocities, we solve for the proper motion, parallax, perturbation size, inclination, and position angle of the line of nodes, while constraining period, velocity amplitude, longitude of periastron, and eccentricity to values determined from radial velocities. We find a perturbation semimajor axis and inclination, α = 0.25 ± 0.06 mas, i = 84° ± 6°, and Gl 876 absolute parallax, π abs = 214.6 ± 0.2 mas. Assuming that the mass of the primary star is M * = 0.32 M ☉ , we find the mass of the planet, Gl 876b, M b = 1.89 ± 0.34 M Jup .
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cited by
The Occurrence and Architecture of Exoplanetary Systems
Winn, J. N., & Fabrycky, D. C. (2015) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-082214-122246 · Cited by 891
The HARPS search for southern extra-solar planets: XXXI. The M-dwarf sample
Bonfils, X., Delfosse, X., Udry, S., Forveille, T., Mayor, M., Perrier, C., Bouchy, F., Gillon, M., Lovis, C., Pepe, F., et al. (2013) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201014704 · Cited by 653
Self-citationStatistical Properties of Exoplanets
Udry, S., & Santos, N. C. (2007) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev.astro.45.051806.110529 · Cited by 622
Improving the Efficiency of Markov Chain Monte Carlo for Analyzing the Orbits of Extrasolar Planets
Ford, E. B. (2006) · The Astrophysical Journal · doi:10.1086/500802 · Cited by 498
A ∼7.5 M⊕Planet Orbiting the Nearby Star, GJ 876
Rivera, E. J., Lissauer, J. J., Butler, R. P., Marcy, G. W., Vogt, S. S., Fischer, D. A., Brown, T. M., Laughlin, G., & Henry, G. W. (2005) · The Astrophysical Journal · doi:10.1086/491669 · Cited by 481
Self-citation
Metadata
- Authors
- Benedict, G. F., McArthur, B. E., Forveille, T., Delfosse, X., Nelan, E., Butler, R. P., Spiesman, W., Marcy, G., Goldman, B., Perrier, C., Jefferys, W. H., & Mayor, M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2002-12-20
- Volume
- 581
- Issue
- 2
- Pages
- L115-L118
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2129323876
- Cited by
- 189
- References
- 0
- FWCI
- 9.10
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: A Mass for the Extrasolar Planet Gliese 876[CLC]b[/CLC] Determined from [ITAL]Hubble Space Telescope[/ITAL] Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities. https://app.cochat.ai/papers/10.1086/346073
- The paper
- Benedict, G. F., McArthur, B. E., Forveille, T., Delfosse, X., Nelan, E., Butler, R. P., Spiesman, W., Marcy, G., Goldman, B., Perrier, C., Jefferys, W. H., & Mayor, M. (2002). A Mass for the Extrasolar Planet Gliese 876[CLC]b[/CLC] Determined from [ITAL]Hubble Space Telescope[/ITAL] Fine Guidance Sensor 3 Astrometry and High-Precision Radial Velocities. The Astrophysical Journal. https://doi.org/10.1086/346073
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
