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| Query : 1998A&A...335..561T |
1998A&A...335..561T - Astronomy and Astrophysics, volume 335, 561-564 (1998/7-2)
Spectroscopic orbit of the ex-eclipsing binary SS Lacertae in the young open cluster NGC 7209.
TOMASELLA L. and MUNARI U.
Abstract (from CDS):
The no-longer-eclipsing system SS Lac in the young open cluster NGC 7209 has been recently announced to show a constant radial velocity. Puzzled by this finding, we have monitored the system during 1997 obtaining 24 Echelle+CCD spectra over 8 orbital revolutions. Our spectra reveal a nice orbital motion with periodic splitting and merging of spectral lines from both components. An accurate orbit has been derived, together with individual masses of the stars. SS Lac presents a moderately eccentric orbit and a probably full synchronization between stellar rotation and orbital revolution.
Abstract Copyright: ∼
Journal keyword(s): binaries: eclipsing - binaries: spectroscopic - stars: individual: SS Lacertae - open clusters: individual: NGC 7209
Simbad objects: 2
| Number of rows : 2 |
| N | Identifier | Otype |
ICRS (J2000) RA |
ICRS (J2000) DEC |
Mag U | Mag B | Mag V | Mag R | Mag I | Sp type |
#ref
1850 - 2024 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | V* SS Lac | SB* | 22 04 41.5514288040 | +46 25 38.110644768 | 10.26 | 10.12 | B9V | 92 | 0 | |||
| 2 | NGC 7209 | OpC | 22 04 53.8 | +46 30 29 | 8.24 | 7.7 | ~ | 128 | 0 |
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