2017ApJ...849..115L


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.18CET04:32:21

2017ApJ...849..115L - Astrophys. J., 849, 115-115 (2017/November-2)

Widespread presence of glycolaldehyde and ethylene glycol around Sagittarius B2.

LI J., SHEN Z., WANG J., CHEN X., LI D., WU Y., DONG J., ZHAO R., GOU W., WANG J., LI S., WANG B. and ZHENG X.

Abstract (from CDS):

We report the detection of widespread CH2OHCHO and HOCH2CH2OH emission in Galactic center giant molecular cloud Sagittarius B2 using the Shanghai Tianma 65 m Radio Telescope. Our observations show for the first time that the spatial distribution of these two important prebiotic molecules extends over 15 arcmin, corresponding to a linear size of approximately 36 pc. These two molecules are not just distributed in or near the hot cores. The abundance of these two molecules seems to decrease from the cold outer region to the central region associated with star formation activity.
Result. presented here suggest that these two molecules are likely to form through a low temperature process. Recent theoretical and experimental studies demonstrated that prebiotic molecules can be efficiently formed in icy grain mantles through several pathways. However, these complex ice features cannot be directly observed, and most constraints on the ice compositions come from millimeter observations of desorbed ice chemistry products. These results, combined with laboratory studies, strongly support the existence of abundant prebiotic molecules in ices.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): ISM: abundances - ISM: clouds - ISM: individual: Sagittarius B2 - ISM: molecules - radio lines: ISM - radio lines: ISM

Simbad objects: 17

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Number of rows : 17

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 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 2887 2
2 [JCC87] IRAS 2A Y*O 03 28 55.55 +31 14 36.7           ~ 380 3
3 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 576 1
4 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 1967 1
5 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1013 1
6 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11246 0
7 NAME Sgr B2 (North) Rad 17 47 20.2 -28 22 21           ~ 504 1
8 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 1879 1
9 NAME Large Molecule Heimat MoC 17 47 20.4943 -28 22 11.656           ~ 109 0
10 NAME Sgr B2 Main Rad 17 47 20.5 -28 23 06           ~ 327 1
11 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 299 0
12 OH 34.26 +0.15 SFR 18 53 18.54 +01 14 57.9           ~ 456 0
13 W 51e2 Rad 19 23 43.90 +14 30 34.8           ~ 179 0
14 IRAS 20126+4104 Y*O 20 14 25.8816186803 +41 13 36.869078243           B2.5-B0.5 392 0
15 [DE95] LDN 1157 B1 out 20 39 11 +68 01.3           ~ 170 0
16 NGC 7129 OpC 21 42 56 +66 06.2     11.5     ~ 232 0
17 NAME NGC 7129 FIR 2 IR 21 44 01.5 +66 03 40           ~ 82 0

    Equat.    Gal    SGal    Ecl

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2020.02.18-04:32:22

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