2000A&A...356..895L


Query : 2000A&A...356..895L

2000A&A...356..895L - Astronomy and Astrophysics, volume 356, 895-902 (2000/4-3)

δ Scuti stars in stellar systems: On the variability of HD 220392 and HD 220391.

LAMPENS P., VAN CAMP M. and SINACHOPOULOS D.

Abstract (from CDS):

HD 220392 (HR 8895), the brightest member of the visual double star CCDM 23239-5349, is a new short-period variable bright star, probably of the δ Scuti type. The period analysis performed on the complete set of definitive Geneva photometry as well as on the data obtained at the ESO 0.5m telescope shows two periodicities of about 4.7 and 5.5 cycles per day (cpd) with amplitudes of 0.014 and 0.011mag respectively. A similar period search on the (smaller) dataset obtained for the 1 mag fainter B-component, HD 220391, however shows no periodicity with an amplitude significantly above the noise level of the data (about 0.006 mag). This difference in variability behaviour is discussed from the consideration that both stars form a common origin pair and are located in the δ Scuti instability strip.

Abstract Copyright:

Journal keyword(s): stars: variables: δ Sct - stars: binaries: visual - stars: individual: HD 220392 - stars: individual: HD 220391 - stars: fundamental parameters

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 220391 PM* 23 23 52.9385630784 -53 48 53.926447572   7.289 7.039     A6/F0(V) 26 0
2 V* DQ Gru dS* 23 23 54.5213186088 -53 48 31.463504820   6.364 6.108     A9/F2(III) 32 0
3 * omi Gru PM* 23 26 36.5609994960 -52 43 17.679494676   5.901 5.522     F4V 65 0

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2022.05.24-08:44:51

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