Abstract
We report the detection of a gaseous circumstellar disk around a relatively old T Tauri star, GM Aurigae. Maps at 4″ resolution in λ = 1.4-mm continuum emission and in the 13CO (2 → 1) line reveal unresolved and compact dust and gas associated with the stellar position and at the core of a larger rotating gaseous disk, 950 × 530 AU in extent. The mean velocity gradient across the disk, which is oriented along PA ≈ 50°, is consistent with rotation about an axis at PA = 140°. The structure observed in 13CO aperture synthesis maps agrees well with synthetic maps of the gas emission generated from a model. For a disk that is inclined 30° from face on, in Keplerian rotation, we derive a 0.80M⊙ central mass (star + disk), a systemic velocity, vhel, of 15.38 km sec-1, and a mass, 0.1M⊙. The spectral energy distribution of the dust continuum emission suggests a very similar mass, 0.09M⊙.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2-10 |
| Number of pages | 9 |
| Journal | Icarus |
| Volume | 106 |
| Issue number | 1 |
| DOIs | |
| State | Published - Nov 1993 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
A Rotating Gaseous Disk around the T Tauri Star GM Aurigae. / Koerner, David W; Sargent, A. I.; Beckwith, S. V W.
In: Icarus, Vol. 106, No. 1, 11.1993, p. 2-10.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A Rotating Gaseous Disk around the T Tauri Star GM Aurigae
AU - Koerner, David W
AU - Sargent, A. I.
AU - Beckwith, S. V W
PY - 1993/11
Y1 - 1993/11
N2 - We report the detection of a gaseous circumstellar disk around a relatively old T Tauri star, GM Aurigae. Maps at 4″ resolution in λ = 1.4-mm continuum emission and in the 13CO (2 → 1) line reveal unresolved and compact dust and gas associated with the stellar position and at the core of a larger rotating gaseous disk, 950 × 530 AU in extent. The mean velocity gradient across the disk, which is oriented along PA ≈ 50°, is consistent with rotation about an axis at PA = 140°. The structure observed in 13CO aperture synthesis maps agrees well with synthetic maps of the gas emission generated from a model. For a disk that is inclined 30° from face on, in Keplerian rotation, we derive a 0.80M⊙ central mass (star + disk), a systemic velocity, vhel, of 15.38 km sec-1, and a mass, 0.1M⊙. The spectral energy distribution of the dust continuum emission suggests a very similar mass, 0.09M⊙.
AB - We report the detection of a gaseous circumstellar disk around a relatively old T Tauri star, GM Aurigae. Maps at 4″ resolution in λ = 1.4-mm continuum emission and in the 13CO (2 → 1) line reveal unresolved and compact dust and gas associated with the stellar position and at the core of a larger rotating gaseous disk, 950 × 530 AU in extent. The mean velocity gradient across the disk, which is oriented along PA ≈ 50°, is consistent with rotation about an axis at PA = 140°. The structure observed in 13CO aperture synthesis maps agrees well with synthetic maps of the gas emission generated from a model. For a disk that is inclined 30° from face on, in Keplerian rotation, we derive a 0.80M⊙ central mass (star + disk), a systemic velocity, vhel, of 15.38 km sec-1, and a mass, 0.1M⊙. The spectral energy distribution of the dust continuum emission suggests a very similar mass, 0.09M⊙.
UR - http://www.scopus.com/inward/record.url?scp=0002206244&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0002206244&partnerID=8YFLogxK
U2 - 10.1006/icar.1993.1154
DO - 10.1006/icar.1993.1154
M3 - Article
AN - SCOPUS:0002206244
VL - 106
SP - 2
EP - 10
JO - Icarus
JF - Icarus
SN - 0019-1035
IS - 1
ER -