INTERSTELLAR CARBODIIMIDE (HNCNH): A NEW ASTRONOMICAL DETECTION FROM THE GBT PRIMOS SURVEY VIA MASER EMISSION FEATURES

@article{McGuire2012INTERSTELLARC,
  title={INTERSTELLAR CARBODIIMIDE (HNCNH): A NEW ASTRONOMICAL DETECTION FROM THE GBT PRIMOS SURVEY VIA MASER EMISSION FEATURES},
  author={Brett A. McGuire and Ryan A. Loomis and Cameron M. Charness and Joanna F. Corby and Geoffrey A. Blake and Jan M. Hollis and Francis J. Lovas and Phil R. Jewell and Anthony J. Remijan},
  journal={The Astrophysical Journal Letters},
  year={2012},
  volume={758}
}
In this work, we identify carbodiimide (HNCNH), which is an isomer of the well-known interstellar species cyanamide (NH2CN), in weak maser emission, using data from the Green Bank Telescope PRIMOS survey toward Sgr B2(N). All spectral lines observed are in emission and have energy levels in excess of 170 K, indicating that the molecule likely resides in relatively hot gas that characterizes the denser regions of this star-forming region. The anticipated abundance of this molecule from ice… 

Submillimeter spectra of 2-hydroxyacetonitrile (glycolonitrile; HOCH 2 CN) and its searches in GBT PRIMOS observations of Sgr B2(N)

Context. Recent experimental works have studied the possible formation of hydroxyacetonitrile on astrophysical grains. It was formed from hydrogen cyanide (HCN) and formaldehyde (H2CO) in the

WEAK MASER EMISSION OF METHYL FORMATE TOWARD SAGITTARIUS B2(N) IN THE GREEN BANK TELESCOPE PRIMOS SURVEY

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 coefficients

Chemical Simulations of Prebiotic Molecules: Interstellar Ethanimine Isomers

The E- and Z-isomers of ethanimine (CH3CHNH) were recently detected toward the star-forming region Sagittarius (Sgr) B2(N) using the Green Bank Telescope PRIMOS cm-wave spectral data, and imaged by

OBSERVATIONAL RESULTS OF A MULTI-TELESCOPE CAMPAIGN IN SEARCH OF INTERSTELLAR UREA [(NH2)2CO]

In this paper, we present the results of an observational search for gas phase urea [(NH2)2CO] observed toward the Sgr B2(N-LMH) region. We show data covering urea transitions from ∼100 GHz to 250

Detection of the cyanomidyl radical (HNCN): a new interstellar species with the NCN backbone

We report here the first detection in the interstellar medium of the cyanomidyl radical (HNCN). Using the Yebes 40m and the IRAM 30m telescopes, we have targeted the doublets of the N = 2–1, 4–3,

Propargylimine in the laboratory and in space: millimetre-wave spectroscopy and its first detection in the ISM

Context. Small imines containing up to three carbon atoms are present in the interstellar medium (ISM). As alkynyl compounds are abundant in this medium, propargylimine (2-propyn-1-imine, HC ≡C−CH

DETECTION OF E-CYANOMETHANIMINE TOWARD SAGITTARIUS B2(N) IN THE GREEN BANK TELESCOPE PRIMOS SURVEY

The detection of E-cyanomethanimine (E-HNCHCN) toward Sagittarius B2(N) is made by comparing the publicly available Green Bank Telescope (GBT) PRIMOS survey spectra to laboratory rotational spectra

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

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

A SEARCH FOR l-C3H+ AND l-C3H IN Sgr B2(N), Sgr B2(OH), AND THE DARK CLOUD TMC-1

Pety et al. recently reported the detection of several transitions of an unknown carrier in the Horsehead PDR and attribute them to l-C3H+. Here, we have tested the predictive power of their fit by

References

SHOWING 1-10 OF 17 REFERENCES

LABORATORY AND TENTATIVE INTERSTELLAR DETECTION OF TRANS-METHYL FORMATE USING THE PUBLICLY AVAILABLE GREEN BANK TELESCOPE PRIMOS SURVEY

The rotational spectrum of the higher-energy trans-conformational isomer of methyl formate has been assigned for the first time using several pulsed-jet Fourier transform microwave spectrometers in

A Rigorous Attempt to Verify Interstellar Glycine

In 2003, Kuan and coworkers reported the detection of interstellar glycine (NH2CH2COOH) based on observations of 27 lines in 19 different spectral bands in one or more of the sources Sgr B2(N-LMH),

Herschel observations of EXtra-Ordinary Sources (HEXOS): Methanol as a probe of physical conditions in Orion KL

We have examined methanol emission from Orion KL with the Herschel/HIFI instrument, and detected two methanol bands centered at 524 GHz and 1061 GHz. The 524 GHz methanol band (observed in HIFI band

Detection of Interstellar Cyanoformaldehyde (CNCHO)

Cyanoformaldehyde (CNCHO) has been detected toward the star-forming region Sagittarius B2(N) with the 100 m Green Bank Telescope (GBT) by means of four P-branch rotational transitions in emission,

A Three-Position Spectral Line Survey of Sagittarius B2 between 218 and 263 GHz. II. Data Analysis

We present an analysis of the data from our Swedish-ESO Submillimetre Telescope molecular line survey in the 1.3 mm band of the N, M, and NW positions in the Sgr B2 molecular cloud. The line

Carbodiimide production from cyanamide by UV irradiation and thermal reaction on amorphous water ice.

It is shown that carbodiimide can be formed from cyanamide at low temperature (10 K), by a photochemical process in argon matrix, in water matrix, or in solid film, which agrees with those expected in the interstellar clouds composed of dust grains in which water is the most predominant compound.

THE RQKA BRANCHES OF CARBODIIMIDE, HNCNH, BETWEEN 1.8 AND 3.3 THZ

Abstract The r Q K a branches of carbodiimide, HNCNH, have been recorded with a tunable far-infrared spectrometer. The r Q K a branches with K a ∈ { 2, 3, 4 }, which occur at approximately 1.8, 2.5,

Microwave detection of interstellar cyanamide

The detection of interstellar cyanamide (NH$sub 2$CH) is reported based on the observation of line emission in Sgr B2 at 80504.5 and 100629.5 MHz corresponding to the transitions 4$sub 13$--3$sub 12$