Unusually high rotational temperature of the CN radical

Details Unusually high rotational temperature of the CN radical Unusually high rotational temperature of the CN radical

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011a%26a...531a..68k&link_type=abstract

Astronomy & Astrophysics, Volume 531, id.A68

Astronomy and Astrophysics

Astrophysics

Ism: Lines And Bands, Ism: Molecules

Scientific paper

We analyse a high-resolution, high signal-to-noise spectrogram of the hot reddened star Trumpler 16 112 to find relationships between the physical parameters of the intervening interstellar medium (e.g., the rotational temperature of the CN radical) and the intensities of interstellar lines/bands. We report on the discovery of an interstellar cloud that shows an exceptionally high rotational temperature of CN (4.5 K) and unusually strong Ca I and Fe I interstellar lines. This rare CaFe-type cloud seemingly contains no diffuse band carriers.
Based on observations collected at the European Organisation for Astronomical Research in the Southern Hemisphere, Chile. Programs 073.D-0609(A) and 082.C-0566(A).

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