Open AccessDetecting extragalactic diffuse interstellar bands (DIBs) in supernova spectra by using ESO data
Author(s) -
A Destiarasari,
L. Puspitarini
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2214/1/012001
Subject(s) - physics , galaxy , astrophysics , redshift , observatory , astronomy , supernova , telescope
Diffuse Interstellar Bands (DIBs) are weak and wide absorption features due to interstellar matter. DIBs are interesting to study because until now their chemical identifications are still unclear. DIBs can be found in reddened spectrum of celestial bodies in our Galaxy and other galaxies. Detecting extragalactic DIBs is challenging, one of the ways is by using an extragalactic supernova spectrum. The supernova acts as a background source to probe interstellar matter in a galaxy. We studied extragalactic DIBs by using the SN 2006X spectrum. The spectrum was observed by using the UVES instrument and the La Silla telescope at the European Southern Observatory (ESO) and was accessed from ESO archives. Detection of DIBs was performed by predicting the central wavelengths of DIBs in the supernova spectrum by taking the galaxy redshift (z) into account and observing DIBs profiles. Small shift variations in the wavelength are allowed. The detection of extragalactic DIBs indicates that DIBs are universal.