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
Numerical recipes in C (2nd ed.): the art of scientific computing
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
Flagged first, then by citations
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Cited by
Sorted by citations
INTRINSIC COLORS, TEMPERATURES, AND BOLOMETRIC CORRECTIONS OF PRE-MAIN-SEQUENCE STARS
Pecaut, M. J., & Mamajek, E. E. (2013) · The Astrophysical Journal Supplement Series · doi:10.1088/0067-0049/208/1/9 · Cited by 2,407
“In addition, based on the study of Mamajek (2005) and parallax data from Weinberger et al. (2013), stars TWA 14, TWA 15A, TWA 15B, TWA 17, TWA 18, TWA 19A, TWA 19B, and TWA 24 are likely members of the Lower Centaurus-Crux subgroup of the Scorpius-Centaurus OB association and thus may be subject to…”
InfluentialSelf-citationImproved Age Estimation for Solar‐Type Dwarfs Using Activity‐Rotation Diagnostics
Mamajek, E. E., & Hillenbrand, L. A. (2008) · The Astrophysical Journal · doi:10.1086/591785 · Cited by 1,313
“The moving cluster distances and probabilities were calculated following Mamajek (2005) using the de Bruijne et al. (2001) convergent point solution with Hipparcos, Tycho-2, or UCAC2 proper motions (in order of preference).”
MethodSelf-citationSoderblom, D. R. (2010) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081309-130806 · Cited by 726
“Another limitation is that some young groups appear to have little net expansion (Mamajek (2005); Makarov (2007)), so that a time when the members were closest together is illdefined.”
BackgroundMethodGagné, J., Mamajek, E. E., Malo, L., Riedel, A. R., Rodriguez, D., Lafreniére, D., Faherty, J. K., Roy-Loubier, O., Pueyo, L. A., Robin, A. C., et al. (2018) · The Astrophysical Journal · doi:10.3847/1538-4357/aaae09 · Cited by 565
“TWA 19 AB is a young star that was defined as a candidate member of TWA by Mamajek (2005), but later listed as a likely contaminant from LCC by Gagné et al. (2017a) based on a preliminary version of BANYAN Σ.”
BackgroundMethodResultSelf-citationPecaut, M. J., Mamajek, E. E., & Bubar, E. J. (2012) · The Astrophysical Journal · doi:10.1088/0004-637x/746/2/154 · Cited by 564
“For our kinematic parallax calculations we followed Mamajek (2005) and used updated space motions for US, UCL and LCC tabulated in Chen et al. (2011)8.”
MethodSelf-citation
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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