Coordinated optical and ultraviolet observations of DH Leo

Details Coordinated optical and ultraviolet observations of DH Leo Coordinated optical and ultraviolet observations of DH Leo

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..560n&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, Aug. 1990, p. 560-568.

Astronomy and Astrophysics

Astronomy

12

Cool Stars, Starspots, Triple Stars, Ultraviolet Spectra, Visual Photometry, Binary Stars, H Alpha Line, H Beta Line, H Gamma Line, Phase Modulation

Scientific paper

Results are reported from contemporaneous KPNO optical spectroscopy, IUE UV spectroscopy, and KPNO R photometry of the DH Leo triple system in spring 1987. The data are presented in tables, graphs, and spectral phase images and discussed in detail. The H-alpha, H-beta, H-gamma, H-delta, and Ca II H and IRT lines are found to have excess emission, and the phase modulation in H-alpha, H-beta, and Ca II is well correlated with the photometric modulation. This result is attributed to the combination of (1) a small amount of global chromospheric emission and (2) emission from plagelike regions associated with cool starspots. The (H-alpha)/(H-beta) ratio is found to be significantly lower than that in longer-period RS CVn systems.

Affiliated with

Also associated with

No associations

Rating

Coordinated optical and ultraviolet observations of DH Leo 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 Coordinated optical and ultraviolet observations of DH Leo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coordinated optical and ultraviolet observations of DH Leo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1124598