Long-term temporal variability of Cygnus X-2

Details Long-term temporal variability of Cygnus X-2 Long-term temporal variability of Cygnus X-2

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...329..276v&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 329, June 1, 1988, p. 276-289.

Astronomy and Astrophysics

Astrophysics

19

Accretion Disks, Cygnus Constellation, Stellar Mass, X Ray Binaries, Heao 1, Long Term Effects, Neutron Stars, Oso-8

Scientific paper

Observations of Cyg X-2, spanning 5 yr and using six different instruments on three satellites (OSO 8, HEAO 1, and Einstein), are presented. Irregular changes in intensity of up to 60% on time scales ranging from minutes to days are seen. The source appears to have long-term low-luminosity states during which dips lasting ≡3 days occur. When these long dips occur, they always appear at the same phase in the optically determined 9.8 day orbital period. There are three distinct types of short-term dips distinguished by differing correlations between spectral hardness and intensity. Both the temporal and the spectral variations are consistent with a scenario in which emission from an intrinsic thermal source surrounded by a hot accretion disk corona is modified by instabilities in a tilted accretion disk.

Affiliated with

Also associated with

No associations

Rating

Long-term temporal variability of Cygnus X-2 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Long-term temporal variability of Cygnus X-2, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long-term temporal variability of Cygnus X-2 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1177667