Search: onr:"swepub:oai:DiVA.org:su-156100" >
An updated Type II ...
An updated Type II supernova Hubble diagram
-
Gall, E. E. E. (author)
-
Kotak, R. (author)
-
Leibundgut, B. (author)
-
show more...
-
Taubenberger, S. (author)
-
Hillebrandt, W. (author)
-
- Kromer, Markus (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Heidelberger Institut für Theoretische Studien, Germany; Institut für Theoretische Astrophysik, Germany
-
Burgett, W. S. (author)
-
Chambers, K. (author)
-
Flewelling, H. (author)
-
Huber, M. E. (author)
-
Kaiser, N. (author)
-
Kudritzki, R. P. (author)
-
Magnier, E. A. (author)
-
Metcalfe, N. (author)
-
Smith, K. (author)
-
Tonry, J. L. (author)
-
Wainscoat, R. J. (author)
-
Waters, C. (author)
-
show less...
-
(creator_code:org_t)
- 2018-03-20
- 2018
- English.
-
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 611
- Related links:
-
https://www.aanda.or...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
show less...
Abstract
Subject headings
Close
- We present photometry and spectroscopy of nine Type II-P/L supernovae (SNe) with redshifts in the 0.045 less than or similar to z less than or similar to 0.335 range, with a view to re-examining their utility as distance indicators. Specifically, we apply the expanding photosphere method (EPM) and the standardized candle method (SCM) to each target, and find that both methods yield distances that are in reasonable agreement with each other. The current record-holder for the highest-redshift spectroscopically confirmed supernova (SN) II-P is PS1-13bni (z = 0.335(-0 .012)(+ 0.009)), and illustrates the promise of Type II SNe as cosmological tools. We updated existing EPM and SCM Hubble diagrams by adding our sample to those previously published. Within the context of Type II SN distance measuring techniques, we investigated two related questions. First, we explored the possibility of utilising spectral lines other than the traditionally used Fe II lambda 5169 to infer the photospheric velocity of SN ejecta. Using local well-observed objects, we derive an epoch-dependent relation between the strong Balmer line and Fe II lambda 5169 velocities that is applicable 30 to 40 days post-explosion. Motivated in part by the continuum of key observables such as rise time and decline rates exhibited from II-P to II-L SNe, we assessed the possibility of using Hubble-flow Type II-L SNe as distance indicators. These yield similar distances as the Type II-P SNe. Although these initial results are encouraging, a significantly larger sample of SNe II-L would be required to draw definitive conclusions.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- supernovae: general
- distance scale
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
-
Gall, E. E. E.
-
Kotak, R.
-
Leibundgut, B.
-
Taubenberger, S.
-
Hillebrandt, W.
-
Kromer, Markus
-
show more...
-
Burgett, W. S.
-
Chambers, K.
-
Flewelling, H.
-
Huber, M. E.
-
Kaiser, N.
-
Kudritzki, R. P.
-
Magnier, E. A.
-
Metcalfe, N.
-
Smith, K.
-
Tonry, J. L.
-
Wainscoat, R. J.
-
Waters, C.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
- Articles in the publication
-
Astronomy and As ...
- By the university
-
Stockholm University