Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-11
Astrophys.J.600:234-253,2004
Astronomy and Astrophysics
Astrophysics
35 pages, 15 figures, to be published in The Astrophysical Journal
Scientific paper
10.1086/379765
We have initiated a spectral line survey, at a wavelength of 3 millimeters, toward the hot molecular core Sagittarius B2(N-LMH). This is the first spectral line survey of the Sgr B2(N) region utilizing data from both an interferometer (BIMA Array) and a single-element radio telescope (NRAO 12 meter). In this survey, covering 3.6 GHz in bandwidth, we detected 218 lines (97 identified molecular transitions, 1 recombination line, and 120 unidentified transitions). This yields a spectral line density (lines per 100 MHz) of 6.06, which is much larger than any previous 3 mm line survey. We also present maps from the BIMA Array that indicate that most highly saturated species (3 or more H atoms) are products of grain chemistry or warm gas phase chemistry. Due to the nature of this survey we are able to probe each spectral line on multiple spatial scales, yielding information that could not be obtained by either instrument alone.
Friedel Douglas N.
Remijan Anthony
Snyder Lewis E.
Turner Barry E.
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