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| Query : 2009A&A...494..237T |
2009A&A...494..237T - Astronomy and Astrophysics, volume 494237-242 (2009/1-4)
Solar-like oscillations in the G8V star τ Ceti.
TEIXEIRA T.C., KJELDSEN H., BEDDING T.R., BOUCHY F., CHRISTENSEN-DALSGAARD J., CUNHA M.S., DALL T., FRANDSEN S., KAROFF C., MONTEIRO M.J.P.F.G. and PIJPERS F.P.
Abstract (from CDS):
We used HARPS to measure oscillations in the low-mass star τ Cet. Although the data were compromised by instrumental noise, we have been able to extract the main features of the oscillations. We found τ Cet to oscillate with an amplitude that is about half that of the Sun, and with a mode lifetime that is slightly shorter than solar. The large frequency separation is 169µHz, and we have identified modes with degrees 0, 1, 2, and 3. We used the frequencies to estimate the mean density of the star to an accuracy of 0.45% which, combined with the interferometric radius, gives a mass of 0.783±0.012M☉ (1.6%).
Abstract Copyright: ∼
Journal keyword(s): stars: oscillations - stars: individual: τ Ceti - stars: individual: δ Pavonis - stars: individual: α Centauri B
Simbad objects: 7
| Number of rows : 7 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | * bet Hyi | PM* | 00 25 45.07036 | -77 15 15.2860 | 3.52 | 3.41 | 2.79 | 2.28 | 1.94 | G0V | 631 | 0 |
| 2 | * tau Cet | PM* | 01 44 04.0831371922 | -15 56 14.927607677 | 4.43 | 4.22 | 3.50 | 2.88 | 2.41 | G8V | 1354 | 1 |
| 3 | * alf Cen B | PM* | 14 39 35.06311 | -60 50 15.0992 | 2.89 | 2.21 | 1.33 | K1V | 1092 | 2 | ||
| 4 | * alf Cen A | SB* | 14 39 36.49400 | -60 50 02.3737 | 0.96 | 0.72 | 0.01 | G2V | 1352 | 1 | ||
| 5 | * 70 Oph | SB* | 18 05 27.28518 | +02 30 00.3558 | 5.40 | 4.89 | 4.03 | 3.38 | 2.92 | K0-V | 679 | 0 |
| 6 | * del Pav | PM* | 20 08 43.6088716052 | -66 10 55.442769229 | 4.78 | 4.32 | 3.56 | 2.95 | 2.61 | G8IV | 422 | 0 |
| 7 | * nu. Ind | ** | 22 24 36.8853892493 | -72 15 19.488237466 | 5.94 | 5.29 | G9VFe-3.1CH-1.5 | 290 | 0 |
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