2006CoAst.148...34R


Query : 2006CoAst.148...34R

2006CoAst.148...34R - Com. in Asteroseismology, 148, 34 (2006/December-0)

Discovery of hybrid γ Dor and δ Sct pulsations in BD+18 4914 through MOST spacebased photometry.

ROWE J.F., MATTHEWS J.M., CAMERON C., BOHLENDER D.A., KING H., KUSCHNIG R., GUENTHER D.B., MOFFAT A.F.J., RUCINSKI S.M., SASSELOV D., WALKER G.A.H. and WEISS W.W.

Abstract (from CDS):

We present a total of 57 days of contiguous, high-cadence photometry (14 days in 2004 and 43 in 2005) of the star BD+18 4914 obtained with the MOST1 satellite. We detect 16 frequencies down to a signal-to-noise of 3.6 (amplitude 0.5 mmag). Six of these are less than 3 cycles/day, and the other ten are between 7 and 16 cycles/day. We intrepret the low frequencies as g-mode γ Doradus-type pulsations and the others as δ Scuti-type p-modes, making BD+18 4914 one of the few known hybrid pulsators of its class. If the g-mode pulsations are high-overtone non-radial modes with identical low degree, we can assign a unique mode classification of n={12, 20, 21, 22, 31, 38} based on the frequency ratio method.

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Journal keyword(s):

Simbad objects: 5

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Number of rows : 5
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 V* V529 And gD* 01 27 26.6728869648 +41 06 04.177819368   6.711 6.425     A7m 89 0
2 * 9 Aur gD* 05 06 40.6306032888 +51 35 51.798998724       4.8   F2V 201 0
3 BD+18 4914 dS* 22 02 37.6965551808 +18 54 02.626783740   11.16 10.63     F5 22 0
4 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1193 1
5 V* CK Ind gD* 22 04 38.4298621464 -64 43 42.005408160   7.57 7.32     A9/F0V-IV 89 0

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