A Large Extension of the CfA Galactic CO Survey
| dc.creator | Dame, T. M. | |
| dc.creator | Thaddeus, P. | |
| dc.date | 2003-10-03 | |
| dc.date.accessioned | 2026-07-07T02:09:59Z | |
| dc.date.available | 2026-07-07T02:09:59Z | |
| dc.description | The Galactic CO survey of Dame, Hartmann, & Thaddeus (2001; hereafter DHT) is composed of both large-scale unbiased surveys, mainly concentrated within 10-deg of the Galactic plane, and targeted observations of clouds at higher latitudes. Analysis of all-sky IRAS and 21 cm maps suggests that the DHT survey is nearly complete for clouds larger than ~1 deg, even though roughly half of the total area at |b| < 30 deg was not observed. In October 2001 we began a new survey of all of this unobserved area that is accessible to the northern 1.2 meter telescope, approximately 6,600 deg^2 between l = 0 deg and 230 deg, mainly in the latitude range |b| = 10-30 deg. At least 12 hours per day is being dedicated to this large project, which is sampled every 1/4-deg (every other beamwidth) to an rms sensitivity of 0.19 K at a velocity resolution of 0.65 km/s. As of May 2003, we have obtained 90,000 of the 106,000 spectra required to complete the survey. While, as expected, the new observations do not substantially change the DHT map, ~68 relatively small and isolated molecular clouds at intermediate latitudes have so far been discovered. The survey has also been extended to b < -30 deg in two regions, one in the vicinity of the large MBM clouds 53-55 at l ~ 90 deg and the other south of the Taurus clouds at l ~170 deg. Substantial amounts of molecular gas were detected in both of these high-latitude regions. | |
| dc.description | 7 pages, 3 figures. To be published in "Milky Way Surveys: The Structure and Evolution of our Galaxy", eds. Dan Clemens and Tereasa Brainerd, APS Conf. Ser | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0310102 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0310102 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/6637 | |
| dc.subject | Astrophysics | |
| dc.title | A Large Extension of the CfA Galactic CO Survey | |
| dc.type | text |