The Peculiar Type Ia Supernova 1999by: Spectroscopy at Early Epochs

Details The Peculiar Type Ia Supernova 1999by: Spectroscopy at Early Epochs The Peculiar Type Ia Supernova 1999by: Spectroscopy at Early Epochs

2001-03-02

arxiv.org/abs/astro-ph/0103034v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in Astron. Journal (2001 June)

Scientific paper

10.1086/321079

We present medium resolution (lambda/Delta lambda = 2500) optical spectroscopy of SN 1999by in NGC 2841 made around its light maximum. The depth ratio of the two Si II features at 5800 AA and 6150 AA being R(SiII) approx. 0.63 at maximum indicates that this SN belongs to the peculiar, sub-luminous SNe Ia. Radial velocities inferred from the minimum of the 6150 AA trough reveal a steeper decline of the velocity curve than expected for ``normal'' SNe Ia, consistent with the behavior of published VRI light curves. A revised absolute magnitude of SN 1999by and distance to its host galaxy NGC 2841 is estimated based on the Multi-Color Light Curve Shape (MLCS) method, resulting in M_V(max)=-18.06+/- 0.1 mag and d = 17.1+/-1.2 Mpc, respectively. An approximative linear dependence of the luminosity parameter Delta on R(SiII) is presented.

Affiliated with

Also associated with

No associations

Rating

The Peculiar Type Ia Supernova 1999by: Spectroscopy at Early Epochs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Peculiar Type Ia Supernova 1999by: Spectroscopy at Early Epochs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Peculiar Type Ia Supernova 1999by: Spectroscopy at Early Epochs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-301587