Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-11
Astronomy and Astrophysics
Astrophysics
Accepted for publishing in PASP
Scientific paper
10.1086/379106
Classifications on the DDO system are given for an additional 231 host galaxies of supernovae that have been discovered during the course of the Lick Observatory Supernova Search with the Katzman Automatic Imaging Telescope (KAIT). This brings the total number of hosts of supernovae discovered (or independently rediscovered) by KAIT, which have so far been classified on a homogeneous system, to 408. The probability that SNe Ia and SNe II have a different distribution of host galaxy Hubble types is found to be 99.7%. A significant difference is also found between the distributions of the host galaxies of SNe Ia and of SNe Ibc (defined here to include SNe Ib, Ib/c, and Ic). However, no significant difference is detected between the frequency distributions of the host galaxies of SNe II and SNe IIn. This suggests that SNe IIn are generally not SNe Ia embedded in circumstellar material that are masquerading as SNe II. Furthermore, no significant difference is found between the distribution of the Hubble types of the hosts of SNe Ibc and of SNe II. Additionally, SNe II-P and SNe II-L are found to occur among similar stellar populations. The ratio of the number of SNe Ia-pec to normal SNe Ia appears to be higher in early-type galaxies than it is in galaxies of later morphological types. This suggests that the ancestors of SNe Ia-pec may differ systematically in age or composition from the progenitors of normal SNe Ia. Unexpectedly, five SNe of Types Ib/c, II, and IIn (all of which are thought to have massive progenitors) are found in host galaxies that are nominally classified as types E and S0. However, in each case the galaxy classification is uncertain, or newly inspected images show evidence suggesting a later classification (abridged) ...
Filippenko Alexei V.
Li Weidong
van den Bergh Sidney
No associations
LandOfFree
Classifications of the Host Galaxies of Supernovae, Set II 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 Classifications of the Host Galaxies of Supernovae, Set II, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Classifications of the Host Galaxies of Supernovae, Set II will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-210899