The DOI matches its Crossref record; 75 of the 75 references it cites were found in a registry or an index.
A Moving Cluster Distance to the Exoplanet 2M1207b in the TW Hydrae Association
Open accessAbstract
A candidate extrasolar planet companion to the young brown dwarf 2MASSW J1207334-393254 (hereafter 2M1207) was recently discovered by Chauvin et al. They find that the temperature and luminosity of 2M1207b are consistent with a young, ~5 M J planet. The 2M1207 system is purported to be a member of the TW Hya association (TWA) and situated ~70 pc away. Using a revised space motion vector for TWA and improved proper motion for 2M1207, I use the moving cluster method to estimate the distance to the 2M1207 system and other TWA members. The derived distance for 2M1207 (53 ± 6 pc) forces the brown dwarf and planet to be half as luminous as previously thought. The inferred masses for 2M1207A and 2M1207b decrease to ~21 and ~3-4 M J , respectively, with the mass of 2M1207b well below the observed tip of the planetary mass function and the theoretical deuterium-burning limit. After removing probable Lower Centaurus Crux (LCC) members from the TWA sample, as well as the probable nonmember TWA 22, the remaining TWA membership is found to have distances of 49 ± 3 (s.e.m.) ± 12 (1 σ) pc and an internal one-dimensional velocity dispersion of 0.8 km s -1 . There is weak evidence that the TWA is expanding, and the data are consistent with a lower limit on the expansion age of 10 Myr (95% confidence).
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Cites
Monet, D. G., Levine, S. E., Canzian, B., Ables, H. D., Bird, A. R., Dahn, C. C., Guetter, H. H., Harris, H. C., Henden, A. A., Leggett, S. K., et al. (2003) · The Astronomical Journal · doi:10.1086/345888 · Cited by 2,203
Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458
Baraffe, I., Chabrier, G., Barman, T., Allard, F. C., & Hauschildt, P. H. (2003) · Springer Link (Chiba Institute of Technology) · doi:10.1051/0004-6361:20030252/pdf · Cited by 1,617
Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 209458
Baraffe, I., Chabrier, G., Barman, T. S., Allard, F. C., & Hauschildt, P. H. (2003) · Astronomy and Astrophysics · doi:10.1051/0004-6361:20030252 · Cited by 1,493 · cited 1×
“Using the constraints on luminosity and age (Chauvin et al. 2005), I interpolate masses from the non-gray evolutionary tracks of Burrows et al. (1997), the DUSTY tracks of Chabrier et al. (2000), and the COND tracks of Baraffe et al. (2003).”
MethodA Nongray Theory of Extrasolar Giant Planets and Brown Dwarfs
Burrows, A. S., Marley, M. S., Hubbard, W. B., Lunine, J. I., Guillot, T., Saumon, D., Freedman, R., Sudarsky, D., & Sharp, C. M. (1997) · The Astrophysical Journal · doi:10.1086/305002 · Cited by 1,371 · cited 2×
“For all three models, the inferred upper mass limit of 2M1207 B (∼5-7MJup) is less than half of the deuterium-burning mass limit (∼13MJup; Burrows et al. 1997), and less than half of the maximum mass of Doppler velocity planets (∼15MJup; Marcy et al. 2005).”
BackgroundMethodA [ITAL]Hipparcos[/ITAL] Census of the Nearby OB Associations
de Zeeuw, P. T., Hoogerwerf, R., de Bruijne, J. H. J., Brown, A. G. A., & Blaauw, A. (1999) · The Astronomical Journal · doi:10.1086/300682 · Cited by 1,317
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Press, W. H., Teukolsky, S. A., Vetterling, W. T., & Flannery, B. P. (1992) · Cambridge University Press eBooks · Cited by 1,156
Evolutionary Models for Very Low-Mass Stars and Brown Dwarfs with Dusty Atmospheres
Chabrier, G., Baraffe, I., Allard, F., & Hauschildt, P. (2000) · The Astrophysical Journal · doi:10.1086/309513 · Cited by 1,057 · cited 1×
“Using the constraints on luminosity and age (Chauvin et al. 2005), I interpolate masses from the non-gray evolutionary tracks of Burrows et al. (1997), the DUSTY tracks of Chabrier et al. (2000), and the COND tracks of Baraffe et al. (2003).”
MethodA giant planet candidate near a young brown dwarf
Chauvin, G., Lagrange, A. ‐., Dumas, C., Zuckerman, B., Mouillet, D., Song, I., Beuzit, J.-L., & Lowrance, P. (2004) · Astronomy and Astrophysics · doi:10.1051/0004-6361:200400056 · Cited by 686 · cited 6×
“With the previous distance estimates (∼70 pc), Chauvin et al. (2004) estimates mass of 25MJup and 5MJup for A and B, respectively.”
BackgroundMethodInfluentialDetection of Thermal Emission from an Extrasolar Planet
Charbonneau, D., Allen, L. E., Megeath, S. T., Torres, G., Alonso, R., Brown, T. M., Gilliland, R. L., Latham, D. W., Mandushev, G., O’Donovan, F. T., et al. (2005) · The Astrophysical Journal · doi:10.1086/429991 · Cited by 644 · cited 1×
“None have been directly imaged, however two have had their light detected through transit studies with the Spitzer Space Telescope (HD 209458b and TRes-1b; Charbonneau et al. 2005; Deming et al. 2005).”
BackgroundThe Second US Naval Observatory CCD Astrograph Catalog (UCAC2)
Zacharias, N., Urban, S. E., Zacharias, M. I., Wycoff, G. L., Hall, D. M., Monet, D. G., & Rafferty, T. J. (2004) · The Astronomical Journal · doi:10.1086/386353 · Cited by 616
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Cited by
Sorted by citations
Items 201–231 of 231
Using Gravity as an Age Indicator for Young Stars
Connelley, M. S., Flores, C., & Reipurth, B. (2026) · The Astrophysical Journal Letters · doi:10.3847/2041-8213/ae31d5 · Cited by 1
Homogeneous Comparison of Directly Detected Planet Candidates: GQ Lup, 2M1207, AB Pic
Neuhäuser, R. (2007) · Springer eBooks · doi:10.1007/978-3-540-74745-1_25 · Cited by 1
Teixeira, R., Ducourant, C., Chauvin, G., Krone-Martins, A., Bonnefoy, M., & Song, I. (2009) · Proceedings of the International Astronomical Union · doi:10.1017/s1743921309992006 · Cited by 1
“However, its membership of the TWA has been questioned recently (Mamajek 2005) due to a lack of accurate kinematic measurements.”
BackgroundDetermination of kinematic distances of pre-main-sequence stars in star-forming regions
Galli, P. A. B., Teixeira, R., Ducourant, C., & Bertout, C. (2009) · Proceedings of the International Astronomical Union · doi:10.1017/s1743921309991463 · Cited by 1
“We developed our first convergent-point analysis based on Mamajek (2005).”
MethodPerryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.005 · Cited by 1
Brown dwarfs and free-floating planets
Perryman, M. A. C. (2011) · Cambridge University Press eBooks · doi:10.1017/cbo9780511994852.010
TW Hydrae astrometric parameters measurement
Teixeira, R., Ducourant, C., Chauvin, G., Krone-Martins, A., Campion, J.-F. L., Song, I., & Zuckerman, B. (2007) · Proceedings of the International Astronomical Union · doi:10.1017/s1743921308019984
Trigonometric parallaxes in the TW Hydrae Association
Ducourant, C., Teixeira, R., Chauvin, G., Krone-Martins, A., Campion, J.-F. L., Galli, P. A. B., Song, I., & Zuckerman, B. (2012) · Proceedings of the International Astronomical Union · doi:10.1017/s1743921312021771
“We compared the preliminary distances derived in this work with the distances determined based on a convergent-point analysis by Mamajek (2005): see Fig.”
MethodAggregation of Knowledge on Star Cluster Structure and Kinematics in Data Intensive Astronomy
Vereshchagin, S. V., & Postnikova, E. S. (2018) · Communications in computer and information science · doi:10.1007/978-3-319-96553-6_9
On the Nature of the Purported Common Proper Motion Companions to the Exoplanet Host Star 51 PegPreprint
Mamajek, E. E. (2010)
Self-citationPerryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.009
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.015
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.016
Brown dwarfs and free-floating planets
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.010
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.004
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.013
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.007 · Cited by 1
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.018
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.001
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.002
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.003
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.014
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.019
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.012
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.006 · Cited by 1
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.008
Stevenson, D. S. (2019) · Springer eBooks · doi:10.1007/978-3-030-25550-3_2
Perryman, M. A. C. (2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.011
(2018) · Cambridge University Press eBooks · doi:10.1017/9781108304160.020
Manjavacas, E., Gennaro, M., Betti, S., Pueyo, L. A., Balmer, W. O., & Robberto, M. (2025) · The Astrophysical Journal · doi:10.3847/1538-4357/ae0a29
Kinematic Properties of the TW Hya Association
Bobylev, V. V. (2026) · Astrophysical Bulletin · doi:10.1134/s1990341326600079
“2 km s − 1 obtained in Mamajek (2005).”
Metadata
- Authors
- Mamajek, E. E.
- Affiliations
- Center for Astrophysics Harvard & Smithsonian (US)
- Corresponding author
- Mamajek, Eric E.
- ORCID
- Mamajek, Eric E.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2005-12
- Volume
- 634
- Issue
- 2
- Pages
- 1385-1394
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2063162420
- Cited by
- 232
- References
- 73
- Citations by year
- 2026: 2 · 2025: 4 · 2024: 2 · 2023: 2 · 2022: 1 · 2021: 4 · 2020: 5 · 2019: 7 · 2018: 31 · 2017: 10 · 2016: 13 · 2015: 7 · 2014: 17 · 2013: 14 · 2012: 20
- FWCI
- 9.50
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Astrophysical Journal (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- CERN Document Server (European Organization for Nuclear Research) (submittedVersion)
- arXiv (Cornell University)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
- Physical Sciences › Earth and Planetary Sciences › Space and Planetary Science › Astro and Planetary Science
- Keywords
- TW Hydrae association, brown dwarfs, exoplanets, association membership, velocity dispersion, deuterium burning limit, space motions
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