Educação matemática pela arte
Gusmão, Lucimar Donizete
2013-08-28
Search results
13 records were found.
Comment: 36 pages, 16 figures. Preprint with full-resolution figures is
available at http://www.nro.nao.ac.jp/~lib_pub/report/data/no682.pdf
Comment: 6 files; 4 figures; accepted for ApJ
Comment: 30pages, 7 figures, Accepted for publication in ApJ
Comment: 10 pages, 6 figures, Proceedings of the Galactic Center Workshop
2009, Shanghai
Comment: 15 pages, 6 figures, accepted for publication in Astrophysical
Journal
Detailed observations of CO, CS, IR continuum, and H2 emission from a large, highly collimated, bipolar outflow in the Monoceros OB1 molecular cloud are presented. The CO observations suggest that molecular gas in the outflow is contained in a shell with higher velocity material situated interior to lower velocity material. The velocities of outflow emission are found to increase with increasing distance from the center of the outflow. Additional detections include shock-excited molecular hydrogen emission from the blueshifted lobe of the outflow and six 2-micron sources in the direction of the outflow. Near-IR and IRAS observations suggest that the driving source for the outflow must have a bolometric luminosity below about 4.5 solar luminosities. It is concluded that the flow is probably not driven by stellar radiation from a central...
We report systematic variations in the emission line ratio of the CO J = 2-1 and J = 1-0 transitions (R_(2-1/1-0)) in the grand-design spiral galaxy M51. The R_(2-1/1-0) ratio shows clear evidence for the evolution of molecular gas from the upstream interarm regions into the spiral arms and back into the downstream interarm regions. In the interarm regions, R_(2-1/1-0) is typically <0.7 (and often 0.4-0.6); this is similar to the ratios observed in Galactic giant molecular clouds (GMCs) with low far-infrared luminosities. However, the ratio rises to >0.7 (often 0.8-1.0) in the spiral arms, particularly at the leading (downstream) edge of the molecular arms. These trends are similar to those seen in Galactic GMCs with OB star formation (presumably in the Galactic spiral arms). R_(2-1/1-0) is also high, ~0.8-1.0, in the central region of...
Comment: 39 pages, 7 figures, 4 tables. Accepted for publication in The
Astronomical Journal
