| Autor: |
Garavini, G., Folatelli, G., Nobili, S., Aldering, G., Amanullah, R., Antilogus, P., Astier, P., Blanc, G., Bronder, T., Burns, M. S., Conley, A., Deustua, S. E., Doi, M., Fabbro, S., Fadeyev, V., Gibbons, R., Goldhaber, G., Goobar, A., Groom, D. E., Hook, I., Howell, D. A., Kashikawa, N., Kim, A. G., Kowalski, M., Kuznetsova, N., Lee, B. C., Lidman, C., Mendez, J., Morokuma, T., Motohara, K., Nugent, P. E., Pain, R., Perlmutter, S., Quimby, R., Raux, J., Regnault, N., Ruiz-Lapuente, P., Sainton, G., Schahmaneche, K., Smith, E., Spadafora, A. L., Stanishev, V., Thomas, R. C., Walton, N. A., Wang, L., Wood-Vasey, W. M., Yasuda, N., Garavini, G., Folatelli, G., Nobili, S., Aldering, G., Amanullah, R., Antilogus, P., Astier, P., Blanc, G., Bronder, T., Burns, M. S., Conley, A., Deustua, S. E., Doi, M., Fabbro, S., Fadeyev, V., Gibbons, R., Goldhaber, G., Goobar, A., Groom, D. E., Hook, I., Howell, D. A., Kashikawa, N., Kim, A. G., Kowalski, M., Kuznetsova, N., Lee, B. C., Lidman, C., Mendez, J., Morokuma, T., Motohara, K., Nugent, P. E., Pain, R., Perlmutter, S., Quimby, R., Raux, J., Regnault, N., Ruiz-Lapuente, P., Sainton, G., Schahmaneche, K., Smith, E., Spadafora, A. L., Stanishev, V., Thomas, R. C., Walton, N. A., Wang, L., Wood-Vasey, W. M., Yasuda, N. |
| Zdroj: |
Astronomy and Astrophysics; August 2007, Vol. 470 Issue: 2 p411-424, 14p |
| Abstrakt: |
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 iiH&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. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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