The Detection of Infrared SiS Bands in Spectra of S Stars

Details The Detection of Infrared SiS Bands in Spectra of S Stars The Detection of Infrared SiS Bands in Spectra of S Stars

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009apj...690l.122c&link_type=abstract

The Astrophysical Journal Letters, Volume 690, Issue 2, pp. L122-L125 (2009).

Astronomy and Astrophysics

Astronomy

7

Infrared: Stars, Molecular Data, Stars: Agb And Post-Agb, Stars: Atmospheres

Scientific paper

We present Spitzer spectra of S stars, which are cool evolved stars with a C/O ratio near unity, some of which have enhanced s-process abundances. We present the detection of a strong and unusual band in the mid-infrared, at 13 μm, within the N-band window. Using quantum-chemically calculated line lists, and model spectra, we identify this band as the fundamental rovibrational band of SiS. Detection of the overtone band at 6.7 μm confirms the identification. Fitting the line profile shows that the molecule is located in relatively cool layers, at T ~ 1500 K. We discuss these results in the context of chemical equilibrium models. The observed strength of these bands in the cool S stars makes them a promising observational diagnostic tool for studying the atmospheres of brown dwarfs and exoplanets.

Affiliated with

Also associated with

No associations

Rating

The Detection of Infrared SiS Bands in Spectra of S Stars 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 The Detection of Infrared SiS Bands in Spectra of S Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Detection of Infrared SiS Bands in Spectra of S Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1782782