Search: onr:"swepub:oai:DiVA.org:su-188246" >
Carbon monoxide for...
Carbon monoxide formation and cooling in supernovae
-
- Liljegren, Sofie (author)
- Uppsala universitet,Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Uppsala University, Sweden,Teoretisk astrofysik,Stockholm Univ, Dept Astron, Oskar Klein Ctr, S-10691 Stockholm, Sweden
-
- Jerkstrand, Anders (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Max Planck Institute for Astrophysics, Germany,Stockholm Univ, Dept Astron, Oskar Klein Ctr, S-10691 Stockholm, Sweden; Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany
-
- Grumer, Jon (author)
- Uppsala universitet,Teoretisk astrofysik
-
(creator_code:org_t)
- 2020-10-13
- 2020
- English.
-
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 642
- Related links:
-
https://www.aanda.or...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- Context. The inclusion of molecular physics is an important piece that tends to be missing from the puzzle when modeling the spectra of supernovae (SNe). Molecules have both a direct impact on the spectra, particularly in the infrared, and an indirect one as a result of their influence on certain physical conditions, such as temperature.Aims. In this paper, we aim to investigate molecular formation and non-local thermodynamic equilibrium (NLTE) cooling, with a particular focus on CO, the most commonly detected molecule in supernovae. We also aim to determine the dependency of supernova chemistry on physical parameters and the relative sensitivity to rate uncertainties.Methods. We implemented a chemical kinetic description of the destruction and formation of molecules into the SN spectral synthesis code SUMO. In addition, selected molecules were coupled into the full NLTE level population framework and, thus, we incorporated molecular NLTE cooling into the temperature equation. We produced a test model of the CO formation in SN 1987A between 150 and 600 days and investigated the sensitivity of the resulting molecular masses to the input parameters.Results. We find that there is a close inter-dependency between the thermal evolution and the amount of CO formed, mainly through an important temperature-sensitive CO destruction process with O+. After a few hundred days, CO completely dominates the cooling of the oxygen-carbon zone of the supernova which, therefore, contributes little optical emission. The uncertainty of the calculated CO mass scales approximately linearly with the typical uncertainty factor for individual rates. We demonstrate how molecular masses can potentially be used to constrain various physical parameters of the supernova.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- supernovae: general
- astrochemistry
- molecular processes
- supernovae: individual: 1987A
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database