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X-ray observations of two Type Ia supernovae with an Hα line in their optical spectrum.

Authors :
Dwarkadas, Vikram V
Source :
Monthly Notices of the Royal Astronomical Society. Sep2024, Vol. 533 Issue 1, p27-35. 9p.
Publication Year :
2024

Abstract

We report on Chandra X-ray observations of SN 2016jae and SN 2018cqj, both low-luminosity Type Ia supernova (SN) that showed the presence of an H line in their early optical spectrum. No X-ray emission is detected at the location of either SN. Upper limits to the luminosity of up to 2 |$\times 10^{40}$|  erg s |$^{-1}$| are calculated for each SN, depending on the assumed spectral model, temperature, and column density. This luminosity is comparable to that of another low-luminosity Type Ia SN, SN 2018fhw, that was observed with Chandra. It is generally lower than upper limits calculated for Type Ia-CSM SNe observed in X-rays, and also below that of SN 2012ca, the only Type Ia-CSM SN to have been detected in X-rays. Comparisons are made to other Type Ia SN with an H line observed in X-rays. The observations suggest that while the density into which the SN is expanding may have been high at the time the H |$\alpha$| line was detected, it had decreased considerably by the time of X-ray observations. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00358711
Volume :
533
Issue :
1
Database :
Academic Search Index
Journal :
Monthly Notices of the Royal Astronomical Society
Publication Type :
Academic Journal
Accession number :
179092312
Full Text :
https://doi.org/10.1093/mnras/stae1628