Interpretation of the Early Spectra of SN 1993J in M81

Details Interpretation of the Early Spectra of SN 1993J in M81 Interpretation of the Early Spectra of SN 1993J in M81

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...416l..21b&link_type=abstract

Astrophysical Journal Letters v.416, p.L21

Astronomy and Astrophysics

Astronomy

32

Stars: Supernovae: Individual Alphanumeric: Sn 1993J

Scientific paper

We present optical spectra obtained on 1993 April 7 and April 13 of the bright supernova SN 1993J in the nearby galaxy M81. The spectra show strong hydrogen Balmer lines with pronounced P Cygni profiles, except for Hα, which is greatly dominated by emission. In order to obtain diagnostics on the velocities, temperatures, densities, and composition of the atmosphere, we present non-local thermodynamic equilibrium (NLTE) synthetic spectrum fits to these observations. For April 7 we find a photospheric velocity of 10,000-11,000 km s^-1^, with a photospheric electron temperature of 7500-8000 K and a radius of 10^15^ cm. On April 13 the photospheric velocity is about 11,000 km s^-1^, the photospheric temperature is about 6500 K, and the radius is ~1.6 x 10^15^ cm. Most of the features of the spectra are well fitted by model atmospheres with solar composition. We find a distance for SN 1993J of 4.0 +/- 0.5 Mpc and the explosion epoch to be UT 1993 March 27.5+/-0.5.

Affiliated with

Also associated with

No associations

Rating

Interpretation of the Early Spectra of SN 1993J in M81 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 Interpretation of the Early Spectra of SN 1993J in M81, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interpretation of the Early Spectra of SN 1993J in M81 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1325293