A&A 429, 667-676 (2005)
Type Ia supernova SN 2003du: Optical observationsG. C. Anupama1, D. K. Sahu1, 2 and J. Jose1, 2
Indian Institute of Astrophysics, II Block Koramangala, Bangalore
560 034, India
Center for Research and Education in Science & Technology, Hosakote
(Received 19 July 2004 / Accepted 15 September 2004 )
photometry and optical spectra of type Ia supernova SN 2003du
obtained at the Indian Astronomical Observatory for nearly a year since
discovery are presented.
The apparent magnitude at maximum was
mag, and the
mag. The luminosity decline rate,
mag indicates an absolute
mag and the distance modulus to
the parent galaxy as
The light curve shapes are similar, though not identical, to those of SNe 1998bu
and 1990N, both of which had luminosity decline rates similar to that of
SN 2003du and occurred in spiral galaxies.
The peak bolometric luminosity indicates that ~
Ni was ejected by the supernova.
The spectral evolution and the evolution of the Si II and Ca II absorption
velocities closely follows that of SN 1998bu, and in general, is within the
scatter of the velocities observed in normal type Ia supernovae.
The spectroscopic and photometric behaviour of SN 2003du
is quite typical for
SNe Ia in spirals.
A high velocity absorption component in the Ca II (H and K) and IR-triplet
features, with absorption velocities of ~
respectively, is detected in the pre-maximum spectra
stars: supernovae: general --
stars: supernovae: individual: SN2003du
© ESO 2004