Orbital Period Modulation in Chromospherically Active Close Binaries

Cafer İBANOĞLU

Article Details

Orbital Period Modulation in Chromospherically Active Close Binaries

Authors:

Cafer İBANOĞLU

Publisher:

TUBITAK

Journal:

Turkish Journal of Physics 1999 Vol.23 Issue 2, pp.321-334

Document Type:

Article

Publication Date:

1/1999

Document Language:

Turkish

Document ID (Org No.):

2000763158

Frequency:

Bimonthly

eISSN:

1303-6122

pISSN:

1300-0101

Keywords:

Abstract:

 

The orbital period changes in some chromospherically active  close binaries have been interpreted as a consequence of magnetic  activity.  At least in two active close binaries a possible  relationship between the orbital period modulation and activity cycle  was suggested.  The existence of a third companion in these binaries  has also been proposed.  The light-time effect which arises from  orbiting around a third-body has been subtracted from all the O-C  values and a cyclic change of the orbital period has been obtained.   These cyclic changes seem to be connected with the total brightness  variations at least in two samples, namely, V471 Tau and RT Lac.  The  lenght of the orbital period modulations and also activity cycle in  these samples are nearly half that of the Sun.

 

The orbital period changes in some chromospherically active  close binaries have been interpreted as a consequence of magnetic  activity.  At least in two active close binaries a possible  relationship between the orbital period modulation and activity cycle  was suggested.  The existence of a third companion in these binaries  has also been proposed.  The light-time effect which arises from  orbiting around a third-body has been subtracted from all the O-C  values and a cyclic change of the orbital period has been obtained.   These cyclic changes seem to be connected with the total brightness  variations at least in two samples, namely, V471 Tau and RT Lac.  The  lenght of the orbital period modulations and also activity cycle in  these samples are nearly half that of the Sun.

Article Details

Orbital Period Modulation in Chromospherically Active Close Binaries

Authors:

Cafer İBANOĞLU

Publisher:

TUBITAK

Journal:

Turkish Journal of Physics 1999 Vol.23 Issue 2, pp.321-334

Document Type:

Article

Publication Date:

1/1999

Document Language:

Turkish

Document ID (Org No.):

2000763158

Frequency:

Bimonthly

eISSN:

1303-6122

pISSN:

1300-0101

Turk. J. Phys.

23

(1999)

321-334. Full text: pdf Other articles published in the same issue: Turk. J. Phys.

vol.23

iss.2.

Issues

Article Details

Orbital Period Modulation in Chromospherically Active Close Binaries

Authors: Cafer İBANOĞLU

Publisher: TUBITAK

Journal: Turkish Journal of Physics 1999 Vol.23 Issue 2, pp.321-334

Document Type: Article

Publication Date: 1/1999

Document Language: Turkish

Document ID (Org No.): 2000763158

Frequency: Bimonthly

eISSN: 1303-6122

pISSN: 1300-0101

Turk. J. Phys.

23

(1999)

321-334. Full text: pdf Other articles published in the same issue: Turk. J. Phys.

vol.23

iss.2.

Issues

Authors:

Cafer İBANOĞLU

Publisher:

TUBITAK

Journal:

Turkish Journal of Physics 1999 Vol.23 Issue 2, pp.321-334

Document Type:

Article

Publication Date:

1/1999

Document Language:

Turkish

Document ID (Org No.):

2000763158

Frequency:

Bimonthly

eISSN:

1303-6122

pISSN:

1300-0101