An ATCA survey of Sagittarius B2 at 7 mm: chemical complexity meets broad-band interferometry

  title={An ATCA survey of Sagittarius B2 at 7 mm: chemical complexity meets broad-band interferometry},
  author={J. Corby and Paul A. Jones and M. Cunningham and K. Menten and A. Belloche and F. Schwab and A. Walsh and Egon Balnozan and L. Bronfman and N. Lo and A. Remijan},
  journal={Monthly Notices of the Royal Astronomical Society},
We present a 30 - 50 GHz survey of Sagittarius B2(N) conducted with the Australia Telescope Compact Array (ATCA) with 5 - 10 arcsec resolution. This work releases the survey data and demonstrates the utility of scripts that perform automated spectral line fitting on broadband line data. We describe the line-fitting procedure, evaluate the performance of the method, and provide access to all data and scripts. The scripts are used to characterize the spectra at the positions of three HII regions… Expand
The physical and chemical structure of Sagittarius B2 - II. Continuum millimeter emission of Sgr B2(M) and Sgr B2(N) with ALMA
Context. The two hot molecular cores Sgr B2(M) and Sgr B2(N), which are located at the center of the giant molecular cloud complex Sagittarius B2, have been the targets of numerous spectral lineExpand
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Towards a three-dimensional distribution of the molecular clouds in the Galactic Centre
We present a study of the three-dimensional structure of the molecular clouds in the Galactic Centre (GC) using CO emission and OH absorption lines. Two CO isotopologue lines, $^{12}$COExpand
Discovery of 14NH3 (2,2) maser emission in Sgr B2 Main
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Small-scale physical and chemical structure of diffuse and translucent molecular clouds along the line of sight to Sgr B2
The diffuse and translucent molecular clouds traced in absorption along the line of sight to strong background sources have so far been investigated mainly in the spectral domain because of limitedExpand
A Centimeter-wave Study of Methanol and Ammonia Isotopologues in Sgr B2(N): Physical and Chemical Differentiation between Two Hot Cores
We present new radio-frequency interferometric maps of emission from the 14NH3, 15NH3, and 14NH2D isotopologues of ammonia, and the 12CH3OH and 13CH3OH isotopologues of methanol toward Sgr B2(N).Expand
CSO and CARMA Observations of L1157. II. Chemical Complexity in the Shocked Outflow
L1157, a molecular dark cloud with an embedded Class 0 protostar possessing a bipolar outflow, is an excellent source for studying shock chemistry, including grain-surface chemistry prior to shocks,Expand
The molecular chemistry of diffuse and translucent clouds in the line-of-sight to Sgr B2: Absorption by simple organic and inorganic molecules in the GBT PRIMOS survey
The 1-50 GHz GBT PRIMOS data contains ~50 molecular absorption lines observed in diffuse and translucent clouds located in the Galactic Center, Bar, and spiral arms in the line-of-sight to Sgr B2(N).Expand
STATCONT: A statistical continuum level determination method for line-rich sources
STATCONT is a python-based tool designed to determine the continuum emission level in spectral data, in particular for sources with a line-rich spectrum. The tool inspects the intensity distributionExpand
Mapping observations of complex organic molecules around Sagittarius B2 with the ARO 12 m telescope
We performed high-sensitivity mapping observations of several complex organic molecules around Sagittarius B2 with ARO 12m telescope at 3-mm wavelength. Based on their spatial distribution, moleculesExpand


Spectral imaging of the Sagittarius B2 region in multiple 7-mm molecular lines
We have undertaken a spectral-line imaging survey of a 6 × 6 arcmin2 area around Sagittarius (Sgr) B2 near the centre of the Galaxy, in the range from 30 to 50 GHz, using the Mopra telescope. TheExpand
Spectral imaging of the Sagittarius B2 region in multiple 3-mm molecular lines with the Mopra telescope
Using the Mopra telescope, we have undertaken a 3-mm spectral-line imaging survey of a 5 × 5 arcmin^2 area around Sgr B2. We covered almost the complete spectral range from 81.7 to 113.5 GHz, withExpand
Detection of Voigt Spectral Line Profiles of Hydrogen Radio Recombination Lines toward Sagittarius B2(N)
We report the detection of Voigt spectral line profiles of radio recombination lines (RRLs) toward Sagittarius B2(N) with the 100 m Green Bank Telescope (GBT). At radio wavelengths, astronomicalExpand
A three-position spectral line survey of Sagittarius B2 between 218 and 263 GHz. I. The observational data
We have surveyed the frequency band 218.30-263.55 GHz toward the core positions N and M and the quiescent cloud position NW in the Sgr B2 molecular cloud using the Swedish-ESO SubmillimetreExpand
A molecular line survey of Sagittarius B2 and Orion-KL from 70 to 115 GHz. I - The observational data
The complete millimeter-wave spectrum between 70 and 115 GHz of the giant Sgr B2 molecular cloud and the star-forming KL region of Orion has been surveyed with the NRAO 11 m telescope at a resolutionExpand
A sensitive broadband molecular line survey of the Sagittarius B2(N) star-forming region has been obtained with the Heterodyne Instrument for the Far-Infrared (HIFI) instrument on the Herschel SpaceExpand
A non-LTE radiative transfer treatment of cis-methyl formate (HCOOCH3) rotational lines is presented for the first time using a set of theoretical collisional rate coefficients. These coefficientsExpand
Subarcsecond Resolution Observations of Sagittarius B2 at 85 GHz
We present 3 mm continuum and spectral line observations of vinyl cyanide (C2H3CN) and ethyl cyanide (C2H5CN) toward the Sgr B2 region carried out by the BIMA Array at subarcsecond resolution. TheseExpand
The IRAM-30 m line survey of the Horsehead PDR - II. First detection of the l-C3H+ hydrocarbon cation
Context. Pure gas-phase chemistry models do not succeed in reproducing the measured abundances of small hydrocarbons in the interstellar medium. Information on key gas-phase progenitors of theseExpand
44 GHz Methanol Masers and Quasi-Thermal Emission in Sagittarius B2
The Very Large Array has been used to obtain ~3'' resolution observations on the 44 GHz 70 → 61A+ transition of CH3OH (methanol) in the Sgr B2 massive star-forming complex. A total of 18 compactExpand