Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A high angular-resolution search for the progenitor of the type Ic
  Supernova 2004gt   We report the results of a high-spatial-resoltion search for the progenitor
of type Ic supernova SN 2004gt, using the newly commissioned Keck laser-guide
star adaptive optics system (LGSAO) along with archival Hubble Space Telescope
data. This is the deepest search yet performed for the progenitor of any type
Ib/c event in a wide wavelength range stretching from the far UV to the near
IR. We determine that the progenitor of SN 2004gt was most likely less luminous
than M_V=-5.5 and M_B=-6.5 magnitudes. The massive stars exploding as
hydrogen-deficient core-collapse supernovae (SNe) should have lost their outer
hydrogen envelopes prior to their explosion, either through winds -- such stars
are identified within our Galaxy as Wolf-Rayet (W-R) stars -- or to a binary
companion. The luminosity limits we set rule out more than half of the known
galactic W-R stars as possible progenitors of this event. In particular, they
imply that a W-R progenitor should have been among the more-evolved (highly
stripped, less luminous) of these stars, a concrete constraint on its
evolutionary state just prior to core collapse. The possibility of a less
luminous, lower-mass binary progenitor cannot be constrained. This study
demonstrates the power of LGS observations in furthering our understanding of
core collapse, and the physics powering supernovae, GRBs and XRFs.

18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th