Abstract
view Abstract Citations (34) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Chromospherically Active Stars. VII. 39 Ceti=AY Ceti, HD185151=V1764 Cygni, and Binary Synchronization Fekel, Francis C. ; Eitter, Joseph J. Abstract Improved orbital elements have been determined for 39 Ceti and HD 185151.39 Cet has a circular orbit with an orbital period of 56.82 days, which differs substantially from its rotational period of 75-78 days. An observation of the lithium region of 39 Cet shows that the G5 III component has almost no lithium in its outer atmosphere. HD 185151 has a circular orbit with an orbital period of 40.142 days and has a nearly identical rotational period. The large mass function suggests that the secondary is a late A to mid F type star whose continuum should be visible at ultraviolet wavelengths. The orbital inclination is estimated to be 62 + or - 12, while the distance is about 390 pc. Orbital and rotational periods are compared for 114 chromospherically active binaries. Publication: The Astronomical Journal Pub Date: April 1989 DOI: 10.1086/115056 Bibcode: 1989AJ.....97.1139F Keywords: Binary Stars; Chromosphere; Stellar Activity; Stellar Composition; Stellar Orbits; Cygnus Constellation; Orbital Elements; Stellar Rotation; Astrophysics; STARS: BINARIES; STARS: CHROMOSPHERES full text sources ADS | data products SIMBAD (25) Related Materials (25) Part 1: 1985AJ.....90.2581F Part 2: 1986AJ.....92.1150F Part 3: 1987AJ.....94..726F Part 4: 1988AJ.....95..215F Part 5: 1988AJ.....96.1426F Part 6: 1989AJ.....97..202F Part 8: 1991AJ....101.1489F Part 9: 1991AJ....102.1439F Part 10: 1993AJ....105.2265F Part 11: 1993AJ....106.2370F Part 12: 1994AJ....108..694F Part 13: 1994AJ....108.1936F Part 14: 1995AJ....109.2821F Part 15: 1996AJ....112..269F Part 16: 1997AJ....114.2747F Part 17: 1998AJ....115.1153F Part 18: 2000AJ....120.3265F Part 19: 2001AJ....122..991F Part 20: 2001AJ....122.3447F Part 21: 2002AJ....124.1064F Part 22: 2004AJ....127.2303F Part 23: 2004AJ....127.2931F Part 24: 2005AJ....129.1669F Part 25: 2005AJ....130..794F Part 26: 2007AJ....134.2079F
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