A Radio Survey of Older T Tauri Stars in the rj Chamaeleontis Cluster

Eric E. Mamajek, Warrick A. Lawson, Eric D. Feigelson

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

: A radio continuum survey of X-ray-identified weak-lined T Tauri stars (WTTs) in the newly-discovered r] Chamaeleontis cluster has been completed using the Australia Telescope Compact Array (ATCA). The 10 known WTTs in the cluster form a unique sample of codistant late-type pre-main-sequence stars with ages of ~8 Myr and masses ranging from 0-1—1-0 MQ. Our survey detected none of the 10 X-ray-emitting WTTs with 3cr sensitivity limits at 4–8 and 8–6 GHz (6–2 and 3–5 cm) of typically 0–4 mJy, corresponding to a radio luminosity of 4–5 x 1015 erg Hz-1 s-1. Rotation periods for these stars indicate that they are not, as a group, fast-rotating stars. The non-detection in the radio bands supports the findings of other radio surveys of inhomogeneous samples of young stars, where radio emission is fairly common (10-30%) among very young T Tauri stars across all late spectral types, but confined to rapidly-rotating F-G-K stars amongst older zero-age main sequence stars. Rotation, more than youth, appears to be the key to radio emission in young stars.

Original languageEnglish (US)
Pages (from-to)257-261
Number of pages5
JournalPublications of the Astronomical Society of Australia
Volume16
Issue number3
DOIs
StatePublished - Jan 1 1999

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T Tauri stars
radio
stars
radio emission
G stars
K stars
pre-main sequence stars
main sequence stars
x rays
luminosity
telescopes
continuums
erg
sensitivity
young

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

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title = "A Radio Survey of Older T Tauri Stars in the rj Chamaeleontis Cluster",
abstract = ": A radio continuum survey of X-ray-identified weak-lined T Tauri stars (WTTs) in the newly-discovered r] Chamaeleontis cluster has been completed using the Australia Telescope Compact Array (ATCA). The 10 known WTTs in the cluster form a unique sample of codistant late-type pre-main-sequence stars with ages of ~8 Myr and masses ranging from 0-1—1-0 MQ. Our survey detected none of the 10 X-ray-emitting WTTs with 3cr sensitivity limits at 4–8 and 8–6 GHz (6–2 and 3–5 cm) of typically 0–4 mJy, corresponding to a radio luminosity of 4–5 x 1015 erg Hz-1 s-1. Rotation periods for these stars indicate that they are not, as a group, fast-rotating stars. The non-detection in the radio bands supports the findings of other radio surveys of inhomogeneous samples of young stars, where radio emission is fairly common (10-30{\%}) among very young T Tauri stars across all late spectral types, but confined to rapidly-rotating F-G-K stars amongst older zero-age main sequence stars. Rotation, more than youth, appears to be the key to radio emission in young stars.",
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A Radio Survey of Older T Tauri Stars in the rj Chamaeleontis Cluster. / Mamajek, Eric E.; Lawson, Warrick A.; Feigelson, Eric D.

In: Publications of the Astronomical Society of Australia, Vol. 16, No. 3, 01.01.1999, p. 257-261.

Research output: Contribution to journalArticle

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