2016A&A...591A.110M


Query : 2016A&A...591A.110M

2016A&A...591A.110M - Astronomy and Astrophysics, volume 591A, 110-110 (2016/7-1)

Terahertz spectroscopy of the 15NH2 amidogen radical.

MARGULES L., MARTIN-DRUMEL M.A., PIRALI O., BAILLEUX S., WLODARCZAK G., ROY P., ROUEFF E. and GERIN M.

Abstract (from CDS):

Context. The determination of isotopic ratios in interstellar molecules is a powerful probe of chemical routes leading to their formation. In particular, the 14N/15N abundance ratio of nitrogen-bearing species provides information on possible fractionation mechanisms. Up to now there is no accurate determination of this ratio in the interstellar medium (ISM) for the amidogen radical, NH2.
Aims. This work is aimed at determining rotational frequencies of 15NH2 to enable its astronomical detection, which will help to understand the formation mechanisms of nitrogen hydrides in the ISM.
Methods. We performed complementary measurements using both synchrotron-based, broadband far-infrared and high-resolution, submillimeter-wave frequencies to investigate the pure rotational spectrum of the 15NH2 species.
Results. The first spectroscopic study of the 15N-isotopologue of the amidogen radical yielded an accurate set of molecular parameters.
Conclusions. Accurate frequencies are now available for 15NH2 up to 7THz (with N"<=13) allowing dedicated astronomical searches to be undertaken.

Abstract Copyright: © ESO, 2016

Journal keyword(s): submillimeter: ISM - line: identification - astronomical databases: miscellaneous - ISM: molecules

VizieR on-line data: <Available at CDS (J/A+A/591/A110): s1.dat s2.lin s3.par s4.cat>

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 Barnard 1 MoC 03 33 16.3 +31 07 51           ~ 295 0
2 LDN 1498 DNe 04 11.0 +24 58           ~ 267 0
3 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 776 0
4 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2822 4
5 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 12903 0
6 W 31c HII 18 10 29.1 -19 56 05           ~ 321 0
7 GAL 034.3+00.1 SFR 18 53 22 +01 14.6           ~ 29 0
8 W 49n HII 19 10 13.2 +09 06 12           ~ 434 3
9 W 51 SNR 19 23 50 +14 06.0           ~ 1209 1

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2022.05.20-22:57:30

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