Details

Autor(en) / Beteiligte

• Melikian, N. D.

Titel

Light curves, variations in the MgII h and k and MgI (2852 Å) emission lines, and polarization of light from the mirids

Ist Teil von

• Astrophysics, 2012-09, Vol.55 (3), p.351-362

Ort / Verlag

Boston: Springer US

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The shape of the light curves, behavior of the MgII h and k and MgI (2852 Å) emission lines, and polarization of the light in different phases of the brightness variation of the mirids are examined. Studies of these characteristics of the mirids confirm earlier results. An analysis of the light curves shows that almost all Mira Cet stars have a hump in the middle of the rising branch of the light curve. This structure is presumably a consequence of the binary nature of the star. Noteworthy new results include a periodic variation of these emission lines during the inverse phases and a dependence of the width of the MgII h and k lines on stellar magnitude. An analysis of more than 400 polarimetric measurements shows that the maximum polarization of individual stars is observed during phases from φ = 0.6 to 0.8, and for a synthetic mirid at phase φ = 0.7.