A candidate substellar companion to CD -33°7795 (TWA 5)

Patrick J. Lowrance, Chris McCarthy, E. E. Becklin, B. Zuckerman, Glenn Schneider, R. A. Webb, Dean C. Hines, J. Davy Kirkpatrick, David W. Koerner, Frank Low, Roland Meier, Marcia Rieke, Bradford A. Smith, Richard J. Terrile, Rodger I. Thompson

Research output: Contribution to journalArticlepeer-review

107 Scopus citations


We present the discovery of a candidate substellar object in a survey of young stars in the solar vicinity using the sensitivity and spatial resolution afforded by the NICMOS coronagraph on the Hubble Space Telescope. The H = 12.1 mag object was discovered approximately 2″ from the TW Hydrae association member CD -33°7795 (TWA 5), and the photometry implies a spectral type M8-M8.5, with a temperature of ∼2600 K. We estimate that the probability of a chance alignment with a background object of this nature is less than 2 × 10-5 and therefore postulate that the object (TWA 5B) is physically associated at a projected separation of 100 AU. Given the likely youth of the primary (∼10 Myr), current brown dwarf cooling models predict a mass of ≈20MJup for TWA 5B.

Original languageEnglish (US)
Pages (from-to)L69-L72
JournalAstrophysical Journal
Issue number1 PART 2
StatePublished - Feb 10 1999


  • Stars: Low-mass, brown dwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


Dive into the research topics of 'A candidate substellar companion to CD -33°7795 (TWA 5)'. Together they form a unique fingerprint.

Cite this