ECHA J0843.3-7905: Discovery of an 'old' classical T Tauri star in the η Chamaeleontis cluster

Warrick A. Lawson; Lisa A. Crause; Eric E. Mamajek; Eric D. Feigelson

doi:10.1046/j.1365-8711.2002.05093.x

ECHA J0843.3-7905: Discovery of an 'old' classical T Tauri star in the η Chamaeleontis cluster

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

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Abstract

A limited-area survey of the η Chamaeleontis cluster has identified two new late-type members. The more significant of these is ECHA J0843.3-7905 (=IRAS F08450-7854), a slowly rotating (P = 12 d) M2 classical T Tauri (CTT) star with a spectrum dominated by Balmer emission. At a distance of 97 pc and cluster age of ≈9 Myr, the star is a nearby rare example of an 'old' CTT star and promises to be a rewarding laboratory for the study of disc structure and evolution in pre-main sequence (PMS) stars. The other new member is the M4 weak-lined T Tauri (WTT) star ECHA J0841.5-7853, which is the lowest mass (M ≈ 0.2 M_⊙) primary known in the cluster.

Original language	English (US)
Pages (from-to)	L29-L33
Journal	Monthly Notices of the Royal Astronomical Society
Volume	329
Issue number	2
DOIs	https://doi.org/10.1046/j.1365-8711.2002.05093.x
State	Published - Jan 11 2002

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1046/j.1365-8711.2002.05093.x

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title = "ECHA J0843.3-7905: Discovery of an 'old' classical T Tauri star in the η Chamaeleontis cluster",

abstract = "A limited-area survey of the η Chamaeleontis cluster has identified two new late-type members. The more significant of these is ECHA J0843.3-7905 (=IRAS F08450-7854), a slowly rotating (P = 12 d) M2 classical T Tauri (CTT) star with a spectrum dominated by Balmer emission. At a distance of 97 pc and cluster age of ≈9 Myr, the star is a nearby rare example of an 'old' CTT star and promises to be a rewarding laboratory for the study of disc structure and evolution in pre-main sequence (PMS) stars. The other new member is the M4 weak-lined T Tauri (WTT) star ECHA J0841.5-7853, which is the lowest mass (M ≈ 0.2 M⊙) primary known in the cluster.",

author = "Lawson, {Warrick A.} and Crause, {Lisa A.} and Mamajek, {Eric E.} and Feigelson, {Eric D.}",

year = "2002",

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doi = "10.1046/j.1365-8711.2002.05093.x",

language = "English (US)",

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T1 - ECHA J0843.3-7905

T2 - Discovery of an 'old' classical T Tauri star in the η Chamaeleontis cluster

AU - Lawson, Warrick A.

AU - Crause, Lisa A.

AU - Mamajek, Eric E.

AU - Feigelson, Eric D.

PY - 2002/1/11

Y1 - 2002/1/11

N2 - A limited-area survey of the η Chamaeleontis cluster has identified two new late-type members. The more significant of these is ECHA J0843.3-7905 (=IRAS F08450-7854), a slowly rotating (P = 12 d) M2 classical T Tauri (CTT) star with a spectrum dominated by Balmer emission. At a distance of 97 pc and cluster age of ≈9 Myr, the star is a nearby rare example of an 'old' CTT star and promises to be a rewarding laboratory for the study of disc structure and evolution in pre-main sequence (PMS) stars. The other new member is the M4 weak-lined T Tauri (WTT) star ECHA J0841.5-7853, which is the lowest mass (M ≈ 0.2 M⊙) primary known in the cluster.

AB - A limited-area survey of the η Chamaeleontis cluster has identified two new late-type members. The more significant of these is ECHA J0843.3-7905 (=IRAS F08450-7854), a slowly rotating (P = 12 d) M2 classical T Tauri (CTT) star with a spectrum dominated by Balmer emission. At a distance of 97 pc and cluster age of ≈9 Myr, the star is a nearby rare example of an 'old' CTT star and promises to be a rewarding laboratory for the study of disc structure and evolution in pre-main sequence (PMS) stars. The other new member is the M4 weak-lined T Tauri (WTT) star ECHA J0841.5-7853, which is the lowest mass (M ≈ 0.2 M⊙) primary known in the cluster.

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ECHA J0843.3-7905: Discovery of an 'old' classical T Tauri star in the η Chamaeleontis cluster

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