A possible sets of diffuse bands originating at the same carrier

¹ Toruń Center for Astronomy, Nicolaus Copernicus University, Gagarina 11, 87-100 Toruń, Poland e-mail: tomcat@astri.uni.torun.pl
² Institute of Physics, Polish Academy of Sciences Al. Lotników 32/46, Pl-02-668 Warszawa, Poland e-mail: fulara@ifpan.edu.pl
³ Nicolaus Copernicus Astronomical Center, Rabiańska 8, Pl-87-100 Toruń, Poland e-mail: schmidt@ncac.torun.pl
⁴ Isaac Newton Institute of Chile, Polish Branch e-mail: jacek@astri.uni.torun.pl

Corresponding author: T. Weselak, tomcat@astri.uni.torun.pl

Received: 6 February 2001
Accepted: 14 June 2001

Abstract

This paper discusses measurements of eight selected diffuse interstellar bands (DIBs): 5793, 5809, 5819, 5828, 6196, 6397, 6614 and 6660 performed in high resolution, high spectra of 41 reddened stars. Central depths, considered less error-prone than equivalent widths, are measured and mutual correlations between the selected DIBs are analyzed. Tight correlations between the DIBs: 5809, 6196, 6614 and 6660 may suggest their common origin despite their widths differing by a factor of up to 2. The performed simulations prove that this fact does not preclude a common, molecular carrier of such features.