Near Infrared Spectrum of SN Ia 2011fe Resembles Fast Decliners Observed A Week Before Maximum

Details Near Infrared Spectrum of SN Ia 2011fe Resembles Fast Decliners Observed A Week Before Maximum Near Infrared Spectrum of SN Ia 2011fe Resembles Fast Decliners Observed A Week Before Maximum

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3599....1h&link_type=abstract

The Astronomer's Telegram, #3599

Astronomy and Astrophysics

Astronomy

Infra-Red, Supernovae

Scientific paper

We observed SN 2011fe with the IRTF 3.0m and the SpeX instrument on August 26.3. The spectrum reveals strong absorption features from MgII at 13500 km/s. The CaII infrared triplet forms a strong and broad feature with a minimum at about 22000 km/s. SiII and OI are also detected at about 12500 km/s. The presence of evolved MgII features in this NIR spectrum is suggestive of a phase no more than one week before maximum light.

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