Optical spectra of Type Ia supernovae at z=0.46 and z=1.2

Authors
Coil, AL Matheson, T Filippenko, AV Leonard, DC Tonry, J Riess, AG Challis, P Clocchiatti, A Garnavich, PM Hogan, CJ Jha, S Kirshner, RP Leibundgut, B Phillips, MM Schmidt, BP Schommer, RA Smith, RC Soderberg, AM Spyromilio, J Stubbs, C Suntzeff, NB Woudt, P
Citation
Al. Coil et al., Optical spectra of Type Ia supernovae at z=0.46 and z=1.2, ASTROPHYS J, 544(2), 2000, pp. L111-L114
Citations number
32
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
544
Issue
2
Year of publication
2000
Part
2
Pages
L111 - L114
Database
ISI
SICI code
0004-637X(200012)544:2<L111:OSOTIS>2.0.ZU;2-K
Abstract
We present optical spectra, obtained with the Keck 10 m telescope, of two h igh-redshift Type Ia supernovae (SNe Ia) discovered by the High-z Supernova Search Team: SN 1999ff at z = 0.455 and SN 1999fv at z similar to 1.2, the highest redshift published SN Ia spectrum. Both SNe were at maximum light when the spectra were taken. We compare our high-z spectra with low-z norma l and peculiar SNe Ia as well as with SNe Ic, Ib, and II. There are no sign ificant differences between SN 1999ff and normal SNe Ia at low redshift. SN 1999fv appears to be an SN Ia and does not resemble the most peculiar near by SNe Ia.