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Coordinated AMBER and MIDI observations of the Mira variable RR Aql.

Coordinated AMBER and MIDI observations of the Mira variable RR Aql.

Authors :
Karovicova, Iva
Wittkowski, Markus
Boboltz, David A.
Scholz, Michael
Source :
AIP Conference Proceedings. 2/16/2009, Vol. 1094 Issue 1, p981-984. 4p. 1 Chart, 3 Graphs.
Publication Year :
2009

Abstract

We have used near- and mid-infrared interferometry to investigate the pulsating atmosphere and the circumstellar environment of the Mira variable RR Aql. Observations were taken with the VLTI/AMBER (near infrared) and the VLTI/MIDI (mid infrared) instruments. We have obtained a total of 15 MIDI epochs between Apr 9, 2004 and Jul 28, 2007 covering 4 pulsation cycles and one AMBER epoch on Sep 9, 2006 at phase 2.82. This work is also part of an ongoing project of joint VLTI and VLBA observations to study the connection between stellar pulsation and the mass loss process. Here we present a comparison of the AMBER visibility data to a simple uniform disk model as well as to predictions by recent self-excited dynamic model atmospheres. The best fitting photospheric angular diameter of the model atmosphere at phase 2.82 is Θphot = 9.9±2.4 mas. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0094243X
Volume :
1094
Issue :
1
Database :
Academic Search Index
Journal :
AIP Conference Proceedings
Publication Type :
Conference
Accession number :
36638743
Full Text :
https://doi.org/10.1063/1.3099285