Educação matemática pela arte
Gusmão, Lucimar Donizete
2013-08-28
Search results
6 records were found.
Comment: 54 pages in total, 18 figures (21 files) and 4 tables, to appear in
Astrophysical Journal Supplement Series. A full color version with higher
resolution figures is available at
http://www.a.phys.nagoya-u.ac.jp/~kawamura/research/NANTEN_LMC_1_preprint_highres.pdf
Comment: 23 pages, 5 figures, accepted for publication in ApJ
Comment: 39 pages, 7 figures, 4 tables. Accepted for publication in The
Astronomical Journal
We have discovered remarkable jet- and arc-like molecular features toward the
rich and young stellar cluster Westerlund2. The jet has a length of ~100 pc and
a width of ~10 pc, while the arc shows a crescent shape with a radius of ~30
pc. These molecular features each have masses of ~10000 solar mass and show
spatial correlations with the surrounding lower density HI gas. The jet also
shows an intriguing positional alignment with the core of the TeV gamma ray
source HESS J1023-575 and with the MeV/GeV gamma-ray source recently reported
by the Fermi collaboration. We argue that the jet and arc are caused by an
energetic event in Westerlund 2, presumably due to an anisotropic supernova
explosion of one of the most massive member stars. While the origin of the TeV
and GeV gamma-ray sources is uncertain, one may speculate that they are r...
We have discovered remarkable jet- and arc-like molecular features toward the rich and young stellar cluster Westerlund2. The jet has a length of ~100 pc and a width of ~10 pc, while the arc shows a crescent shape with a radius of ~30 pc. These molecular features each have masses of ~10000 solar mass and show spatial correlations with the surrounding lower density HI gas. The jet also shows an intriguing positional alignment with the core of the TeV gamma ray source HESS J1023-575 and with the MeV/GeV gamma-ray source recently reported by the Fermi collaboration. We argue that the jet and arc are caused by an energetic event in Westerlund 2, presumably due to an anisotropic supernova explosion of one of the most massive member stars. While the origin of the TeV and GeV gamma-ray sources is uncertain, one may speculate that they are rel...
New 12CO J=4-3 and 13CO J=3-2 observations of the N159 region in the Large
Magellanic Cloud have been made. The 12CO J=4-3 distribution is separated into
three clumps. These new measurements toward the three clumps are used in
coupled calculations of molecular rotational excitation and line radiation
transfer, along with other transitions of the 12CO as well as the isotope
transitions of 13CO. The temperatures and densities are determined to be
~70-80K and ~3x10^3 cm-3 in N159W and N159E and ~30K and ~1.6x10^3 cm-3 in
N159S. These results are compared with the star formation activity. The N159E
clump is associated with embedded cluster(s) as observed at 24 micron and the
derived high temperature is explained as due to the heating by these sources.
The N159E clump is likely responsible for a dark lane in a large HII region by
the dust...
