Excitation temperature of C2 and broadening of the 6196A diffuse interstellar band

Abstract

This paper presents a finding of the correlation between the width of a strong diffuse interstellar band at 6196A and the excitation temperature of C2 based on high resolution and high signal-to-noise ratio spectra. The excitation temperature was determined from absorption lines of the Phillips A-X and Mulliken D-X systems. The width and shape of the narrow 6196A DIB profile apparently depend on the C2 temperature, being broader for higher values.

arXiv comment7 pages, 8 figures, A&A 2009

References in corpus (7)

• A FUSE Survey of Interstellar Molecular Hydrogen in Translucent Clouds
• Abundances and Behavior of 12CO, 13CO, and C2 in Translucent Sight Lines
• Cloud Structure and Physical Conditions in Star-forming Regions from Optical Observations. I. Data and Component Structure
• The Rotational Excitation Temperature of the $\lambda$6614 Diffuse Interstellar Band Carrier
• Early-type stars observed in the ESO UVES Paranal Observatory Project: I -- Interstellar Na I UV, Ti II and Ca II K observations
• Observations of rotationally resolved C3 in translucent sight lines
• Limits to Interstellar C_4 and C_5 Towards zeta Ophiuchi

Cited by in corpus (14)

• Anomalous Diffuse Interstellar Bands in the Spectrum of Herschel 36. I. Observations of Rotationally Excited CH and CH+ Absorption and Strong, Extended Redward Wings on Several DIBs
• The EDIBLES survey III. C2-DIBs and their profiles
• Abundances and rotational temperatures of the C2 interstellar molecule towards six reddened early-type stars
• Using machine learning to classify the diffuse interstellar bands
• Centrosymmetric molecules as possible carriers of diffuse interstellar bands
• The $\lambda$6614 diffuse interstellar absorption band: evidence for internal excitation of the carrier
• The EDIBLES survey V: Line profile variations in the $\lambda \lambda$5797, 6379, and 6614 diffuse interstellar bands as a tool to constrain carrier sizes
• The well correlated DIBs at $\lambda \lambda$ 6196, 6614 Å and their possible companions
• Broadened profiles of Diffuse Interstellar Bands
• Position displacement of diffuse interstellar bands
• On the intrinsic rest wavelengths of diffuse interstellar bands
• Survey of Profile Parameters of the $6196\mathring{A}$ Diffuse Interstellar Band. From Uniform Profiles to Doppler Splitting and Blueshifts
• The EDIBLES survey. X. The 6196 Å diffuse interstellar band: Identification of side DIBs as an indication of a small carrier molecule
• On a common carrier hypothesis for the 6613.6 and 6196.0 Å diffuse interstellar bands