| Title: |
Quantitative comparison between type Ia supernova spectra at low and high redshifts: a case study |
| Authors: |
Garavini, G; Folatelli, G; Nobili, S; Aldering, G; Amanullah, R; Antilogus, P; Astier, P; Blanc, G; Bronder, T; Burns, MS; Conley, A; Deustua, SE; Doi, M; Fabbro, S; Fadeyev, V; Gibbons, R; Goldhaber, G; Goobar, A; Groom, DE; Hook, I; Howell, DA; Kashikawa, N; Kim, AG; Kowalski, M; Kuznetsova, N; Lee, BC; Lidman, C; Mendez, J; Morokuma, T; Motohara, K; Nugent, PE; Pain, R; Perlmutter, S; Quimby, R; Raux, J; Regnault, N; Ruiz-Lapuente, P; Sainton, G; Schahmaneche, K; Smith, E; Spadafora, AL; Stanishev, V; Thomas, RC; Walton, NA; Wang, L; Wood-Vasey, WM; Yasuda, N |
| Source: |
Astronomy & Astrophysics, vol 470, iss 2 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2007 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
5101 Astronomical Sciences (for-2020); 51 Physical Sciences (for-2020); stars : supernovae : general; cosmology : early Universe; astro-ph; 0201 Astronomical and Space Sciences (for); Astronomy & Astrophysics (science-metrix); 5107 Particle and high energy physics (for-2020); 5109 Space sciences (for-2020) |
| Subject Geographic: |
411 - 424 |
| Description: |
We develop a method to measure the strength of the absorption features in type Ia supernova (SN Ia) spectra and use it to make a quantitative comparisons between the spectra of type Ia supernovae at low and high redshifts. In this case study, we apply the method to 12 high-redshift (0.212 ≤ z ≤ 0.912) SNe Ia observed by the Supernova Cosmology Project. Through measurements of the strengths of these features and of the blueshift of the absorption minimum in Ca ii H&K, we show that the spectra of the high-redshift SNe Ia are quantitatively similar to spectra of nearby SNe Ia (z < 0.15). One supernova in our high redshift sample, SN 2002fd at z = 0.279, is found to have spectral characteristics that are associated with peculiar SN 1991T/SN 1999aa-like supernovae. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt5mw3m0nt; https://escholarship.org/uc/item/5mw3m0nt; https://escholarship.org/content/qt5mw3m0nt/qt5mw3m0nt.pdf |
| DOI: |
10.1051/0004-6361:20065400 |
| Availability: |
https://escholarship.org/uc/item/5mw3m0nt; https://escholarship.org/content/qt5mw3m0nt/qt5mw3m0nt.pdf; https://doi.org/10.1051/0004-6361:20065400 |
| Rights: |
public |
| Accession Number: |
edsbas.B42DD0B2 |
| Database: |
BASE |