Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-04-16
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
6 pages, 3 figures, accepted for publication in PASJ
Scientific paper
We present new measurements of the diameter of o Cet (Mira) as a function of wavelength in the 2.2 micron atmospheric window using the adaptive optics system and the infrared camera and spectrograph mounted on the Subaru Telescope. We found that the angular size of the star at the wavelengths of CO and H2O absorption lines were up to twice as large as the continuum photosphere. This size difference is attributable to the optically thick CO and H2O molecular layers surrounding the photosphere. This measurement is the first direct differential spectroscopic imaging of stellar extension that resolves individual molecular lines with high spectral-resolution observations. This observation technique is extremely sensitive to differences in spatial profiles at different wavelengths; we show that a difference in diameter much smaller than the point spread function can be measured.
Gaessler Wolfgang
Goto Miwa
Hayano Yutaka
Iye Masanori
Kamata Yukiko
No associations
LandOfFree
Direct Observation of the Extended Molecular Atmosphere of o Cet by Differential Spectral Imaging with an Adaptive Optics System 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 Direct Observation of the Extended Molecular Atmosphere of o Cet by Differential Spectral Imaging with an Adaptive Optics System, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct Observation of the Extended Molecular Atmosphere of o Cet by Differential Spectral Imaging with an Adaptive Optics System will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-140421