2018A&A...619A..28L


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.12CET15:31:57

2018A&A...619A..28L - Astronomy and Astrophysics, volume 619A, 28-28 (2018/11-1)

The ALMA-PILS survey: Stringent limits on small amines and nitrogen-oxides towards IRAS 16293-2422B.

LIGTERINK N.F.W., CALCUTT H., COUTENS A., KRISTENSEN L.E., BOURKE T.L., DROZDOVSKAYA M.N., MULLER H.S.P., WAMPFLER S.F., VAN DER WIEL M.H.D., VAN DISHOECK E.F. and JORGENSEN J.K.

Abstract (from CDS):


Context. Hydroxylamine (NH2OH) and methylamine (CH3NH2) have both been suggested as precursors to the formation of amino acids and are therefore, of interest to prebiotic chemistry. Their presence in interstellar space and formation mechanisms, however, are not well established.
Aims. We aim to detect both amines and their potential precursor molecules NO, N2O, and CH2NH towards the low-mass protostellar binary IRAS 16293-2422, in order to investigate their presence and constrain their interstellar formation mechanisms around a young Sun-like protostar.
Methods. ALMA observations from the unbiased, high-angular resolution and sensitivity Protostellar Interferometric Line Survey (PILS) are used. Spectral transitions of the molecules under investigation are searched for with the CASSIS line analysis software.
Results. CH2NH and N2O are detected for the first time, towards a low-mass source, the latter molecule through confirmation with the single-dish TIMASSS survey. NO is also detected. CH3NH2 and NH2OH are not detected and stringent upper limit column densities are determined.
Conclusions. The non-detection of CH3NH2 and NH2OH limits the importance of formation routes to amino acids involving these species. The detection of CH2NH makes amino acid formation routes starting from this molecule plausible. The low abundances of CH2NH and CH3NH2 compared to Sgr B2 indicate that different physical conditions influence their formation in low- and high-mass sources.

Abstract Copyright: © ESO 2018

Journal keyword(s): astrochemistry - stars: formation - stars: protostars - ISM: molecules - ISM: individual objects: IRAS 16293-2422 - astrobiology

Simbad objects: 16

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Number of rows : 16

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME W3 IRS 5 Y*O 02 25 40.54 +62 05 51.4           B1 322 0
2 [SVS76] NGC 1333 13A smm 03 29 03.73 +31 16 03.8           ~ 38 0
3 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 567 1
4 NAME Orion S reg 05 35 12.9 -05 24 10           ~ 117 0
5 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 1944 1
6 IRC +10216 C* 09 47 57.406 +13 16 43.56     10.96     C9,5e 2104 0
7 LDN 183 MoC 15 54 12.2 -02 49 42           ~ 674 1
8 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 999 1
9 NAME IRAS 16293-2422B Y*O 16 32 22.63 -24 28 31.8           ~ 163 0
10 NAME Sgr B2 (North) Rad 17 47 20.2 -28 22 21           ~ 497 1
11 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1855 1
12 NAME Sgr B2 Main Rad 17 47 20.5 -28 23 06           ~ 324 1
13 NAME Sgr B2 (OH) MoC 17 47 20.8 -28 23 32           ~ 79 0
14 W 51m Rad 19 23.7 +14 30           ~ 49 0
15 [DE95] LDN 1157 B2 out 20 39 09.3 +68 00 44           ~ 56 0
16 [DE95] LDN 1157 B1 out 20 39 11 +68 01.3           ~ 164 0

    Equat.    Gal    SGal    Ecl

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2019.11.12-15:31:57

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