Skip to main content Accessibility help
×
Home

The Classification of T Dwarfs

  • Adam J. Burgasser (a1), Thomas R. Geballe (a2), David A. Golimowski (a3), Sandy K. Leggett (a4), J. Davy Kirkpatrick (a5), Gillian R. Knapp (a6) and Xiaohui Fan (a7)...

Abstract

The discovery of many cool brown dwarfs similar to Gliese 229B has led to the definition of a new spectral class, the T dwarfs, whose 1–2.5 μm spectra exhibit signatures of CH4 absorption. Two classification schemes have been proposed for these objects by Burgasser et al. and Geballe et al. We discuss and compare these schemes, and describe a joint classification scheme currently in development that closely follows the guidelines of the MK process. We also address future work toward establishing gravity classes, classifying at other wavelengths, and identifying those features that may signify the end of the T spectral class.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The Classification of T Dwarfs
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The Classification of T Dwarfs
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The Classification of T Dwarfs
      Available formats
      ×

Copyright

References

Hide All
Burgasser, A. J. 2001, Ph.D. Thesis, California Institute of Technology
Burgasser, A. J., et al. 1999, ApJ, 522, L65
Burgasser, A. J., et al. 2000a, ApJ, 531, L57
Burgasser, A. J., et al. 2000b, AJ, 120, 1100
Burgasser, A. J., et al. 2002, ApJ, 564, 421 (B02)
Burrows, A., Marley, M. S., & Sharp, C. M. 2000, ApJ, 531, 438
Burrows, A., & Sharp, C. M. 1999, ApJ, 512, 843
Burrows, A., et al. 2001, RvMP, 73, 719
Chabrier, G. 2002, ApJ, 567, 304
Cuby, J. G., et al. 1999, A&A, 349, L41
Geballe, T. R., et al. 2002, ApJ, 564, 466 (G02)
Kirkpatrick, J. D., et al. 1999, ApJ, 519, 802
Leggett, S. K., et al. 2000, ApJ, 536, L35
Leggett, S. K., et al. 2002, MNRAS, 332, 78
Lodders, K. 1999, ApJ, 519, 793
Lucas, P. W., et al. 2001, MNRAS, 326, 695
Luhman, K. L., et al. 1998, ApJ, 493, 909
Martín, E. L., Rebolo, R., & Zapatero Osorio, M. R. 1996, ApJ, 469, 706
Morgan, W. W., Keenan, P. C., & Kellman, E. 1943, An Atlas of Stellar Spectra, with an Outline of Spectral Classification (Chicago: Univ. Chicago Press)
Nakajima, T., et al. 1995, Nature, 378, 463
Noll, K. S., et al. 2000, ApJ, 541, L75
Oppenheimer, B. R., et al. 1995, Science, 270, 1478
Oppenheimer, B. R., et al. 1998, ApJ, 502, 932
Reid, I. N., et al. 1999, ApJ, 521, 613
Strauss, M. A., et al. 1999, ApJ, 522, L61
Tsuji, T., Ohnaka, K., & Aoki, W. 1999, ApJ, 520, L119
Zapatero Osorio, M. R., et al. 2002, ApJ, in press (astro-ph/0206353)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed