SN 1993J in M 81: Optical photometry and spectrophotometry during the first two months

Details SN 1993J in M 81: Optical photometry and spectrophotometry during the first two months SN 1993J in M 81: Optical photometry and spectrophotometry during the first two months

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...295..403p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 295, no. 2, p. 403-412

Astronomy and Astrophysics

Astrophysics

13

Absorption Spectra, Emission Spectra, Line Spectra, Photosphere, Stellar Magnitude, Supernovae, Temperature Distribution, Velocity Distribution, Astronomical Photometry, Charge Coupled Devices, Stellar Spectrophotometry

Scientific paper

CCD photometric and spectrophotometric data on the type IIb supernova 1993J in M 81 (NGC 3031) obtained from Vainu Bappu Observatory, Kavalur, during the first two months since the outburst are reported. The evolution of the spectrum is described. The evolution of the velocity of P-Cygni absorption dips due to different lines is presented. The photospheric temperature and radius are determined using blackbody fits to BVRIJHK photometry after correcting for interstellar extinction and contribution to the band by the net line emission. The evolution of photospheric radius implies a density variation in the progenitor rho varies as r-n with n = 5-6 during the rise to the second maximum reducing to n = 2 soon after. These values are comparable to the corresponding values for SN1987A. An application of the expanding photosphere method yields a distance of 2.2-5.1 Mpc for the range of E(B-V) = 0.08-0.32, and the atmospheric dilution factor zeta = 0-0.4. The distance estimates with the assumption of low reddening and low dilution as well as moderate reddening and moderate dilution are both consistent with the Hubble Space Telescope (HST) Cepheid distance to M 81 (3.6 +/- 0.3 Mpc).

Affiliated with

Also associated with

No associations

Rating

SN 1993J in M 81: Optical photometry and spectrophotometry during the first two months 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 SN 1993J in M 81: Optical photometry and spectrophotometry during the first two months, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and SN 1993J in M 81: Optical photometry and spectrophotometry during the first two months will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-881274