2001A&A...373..960L


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET09:19:49

2001A&A...373..960L - Astronomy and Astrophysics, volume 373, 960-965 (2001/7-3)

HD 169981 - an overlooked photometric binary?

LEHMANN H., HILDEBRANDT G., PANOV K.P. and SCHOLZ G.

Abstract (from CDS):

In 1999 and 2000 we obtained spectroscopic and photometric observations of the A-type binary star HD 169981. The observations were part of a campaign to search for short-term photometric and radial-velocity variations among early-type binaries. From the radial velocities of 18 metal lines we derived more precise orbital elements. Quite unexpectedly, our photometric data show a dip that could be caused by an eclipse. The same feature is also visible in the Hipparcos data. From our analysis of the available observations we have estimated the physical parameters of the binary. Neither the spectroscopic nor the photometric observations hint at any short-term variations.

Abstract Copyright:

Journal keyword(s): stars: binaries: eclipsing - stars: binaries: spectroscopic - stars: individual: HD 169981

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 - 2020
#notes
1 V* AK Her WU* 17 13 57.8235712254 +16 21 00.617382214   9.04 8.51   7.874 F8Vv 247 0
2 V* U Oph Al* 17 16 31.7132736201 +01 12 37.996480495   5.941 5.921     B3V 365 1
3 * 108 Her SB* 18 20 56.9701845131 +29 51 32.120410658   5.84 5.63   5.37 kA3mA7+A9V 88 0
4 * t Her * 18 21 01.0202651422 +28 52 11.821053982   5.322 5.115     A8Vn 46 0
5 HD 169981 SB* 18 25 58.7870959144 +29 49 44.146965856 5.99 5.90 5.83 5.75 5.71 A2IV 67 0

    Equat.    Gal    SGal    Ecl

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2020.10.25-09:19:49

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