Photospheres of Mira variables

2006 ◽  
pp. 187-188
Author(s):  
M. S. Bessell ◽  
J. M. Brett ◽  
M. Scholz ◽  
Y. Takeda ◽  
R. Wehrsee ◽  
...  
Keyword(s):  
Mira Variables

Polarimetric Observations of Red Variables: A Study of Gas and Particle Interactions

1979 ◽  
Vol 46 ◽  
pp. 386-408 ◽  
Author(s):  
G. V. Coyne ◽  
I. S. McLean
Keyword(s):  
Wavelength Dependence ◽  
Stellar Atmosphere ◽  
Molecular Absorption ◽  
Absorption Bands ◽  
Absorption And Emission ◽  
Mira Variables ◽  
Stellar Photosphere ◽  
Regular Variable ◽  
Red Supergiants ◽  
Balmer Lines

AbstractIn recent years the wavelength, dependence of the polarization in a number of Mira variables, semi-regular variables and red supergiants has been measured with resolutions between 0.3 and 300 A over the range 3300 to 11000 A. Variations are seen across molecular absorption bands, especially TiO bands, and across atomic absorption and emission lines, especially the Balmer lines. In most cases one can ignore or it is possible to eliminate the effects due to interstellar polarization, so that one can study the polarization mechanisms operating in the stellar atmosphere and environment. The stars Omicron Ceti. (Mira), V CVn (semi-regular variable) and Mu Cephei (M2 la), in addition to other stars similar to them, will be discussed in some detail.Models to explain the observed polarization consider that the continuum flux is polarized either by electron, molecular and/or grain scattering or by temperature variations and/or geometrical asymmetries over the stellar photosphere. This polarized radiation is affected by atomic and molecular absorption and emission processes at various geometric depths in the stellar atmosphere and envelope. High resolution spectropolarimetry promises, therefore, to be a power-rul tool for studying stratification effects in these stars.

The MOLspheres of Mira Variables

2015 ◽  
Vol 71-72 ◽  
pp. 249-250
Author(s):  
K.H. Hinkle ◽  
T. Lebzelter
Keyword(s):  
Mira Variables

scholarly journals On the shock-induced variability of emission lines in M-type Mira variables

2003 ◽  
Vol 400 (1) ◽  
pp. 319-328 ◽  
Author(s):  
He. Richter ◽  
P. R. Wood ◽  
P. Woitke ◽  
U. Bolick ◽  
E. Sedlmayr
Keyword(s):  
Emission Lines ◽  
Mira Variables

Results from the PTI's studies of the spectral angular diameters of Mira variables

2003 ◽  
Author(s):  
Robert R. Thompson ◽  
Michelle J. Creech-Eakman ◽  
Gerard T. van Belle
Keyword(s):  
Mira Variables ◽  
Angular Diameters

ISO-SWS Observations of the Time Variability of Oxygen-Rich Mira Variables

1998 ◽  
pp. 331-338
Author(s):  
T. Onaka ◽  
I. Yamamura ◽  
T. De Jong ◽  
T. Tanabé ◽  
O. Hashimoto ◽  
...  
Keyword(s):  
Time Variability ◽  
Mira Variables

Mira Project and the Observations of Mira Variables

2003 ◽  
pp. 405-408
Author(s):  
Koichi Sato ◽  
Masanori Yoshizawa ◽  
Jun Nishikawa ◽  
Naoko Ohishi ◽  
Takayuki Kotani
Keyword(s):  
Mira Variables

Atmospheric Shocks in Mira Variables — MgII Emission

1988 ◽  
pp. 67-68 ◽  
Author(s):  
Edward W. Brugel ◽  
T. E. Beach ◽  
L. A. Willson ◽  
G. H. Bowen
Keyword(s):  
Mira Variables

scholarly journals Silicate condensation in Mira variables

2016 ◽  
Vol 591 ◽  
pp. A17 ◽  
Author(s):  
Hans-Peter Gail ◽  
Michael Scholz ◽  
Annemarie Pucci
Keyword(s):  
Mira Variables
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