2009A&A...494..237T


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET00:44:16

2009A&A...494..237T - Astronomy and Astrophysics, volume 494, 237-242 (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

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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 - 2021
#notes
1 * bet Hyi PM* 00 25 45.07036 -77 15 15.2860 3.52 3.41 2.79 2.28 1.94 G0V 553 0
2 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1106 1
3 * alf Cen B PM* 14 39 35.06311 -60 50 15.0992 2.89 2.21 1.33     K1V 905 1
4 * alf Cen A SB* 14 39 36.49400 -60 50 02.3737 0.96 0.72 0.01     G2V 1147 0
5 * 70 Oph Ro* 18 05 27.28518 +02 30 00.3558 5.40 4.89 4.03 3.38 2.92 K0-V 609 0
6 * del Pav PM* 20 08 43.6094697 -66 10 55.443275 4.78 4.32 3.56 2.95 2.61 G8IV 355 0
7 * nu. Ind ** 22 24 36.8855638745 -72 15 19.494501994   5.94 5.29     G9VFe-3.1CH-1.5 247 0

    Equat.    Gal    SGal    Ecl

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2020.11.28-00:44:16

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