2012ApJ...758L...4S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST15:47:10

2012ApJ...758L...4S - Astrophys. J., 758, L4 (2012/October-2)

Tentative detection of deuterated methane toward the low-mass protostar IRAS 04368+2557 in L1527.

SAKAI N., SHIRLEY Y.L., SAKAI T., HIROTA T., WATANABE Y. and YAMAMOTO S.

Abstract (from CDS):

The millimeter-wave rotational transition line (JK= 10-00) of deuterated methane CH3 D has tentatively been detected toward the low-mass Class 0 protostar IRAS 04368+2557 in L1527 with the Heinrich Hertz Submillimeter Telescope. This is the first detection of CH3 D in interstellar clouds, if confirmed. The column density and fractional abundance of CH3 D are determined to be (9.1±3.4)x1015/cm2 and (3.0±1.1)x10–7, respectively, where we assume the rotational temperature of 25 K. The column density and fractional abundance of the gaseous CH4 are estimated to be (1.3-4.6) x 1017/cm2 and (4.3-15.2)x10–6, respectively, by adopting the molecular D/H ratios of 2%-7% reported for various molecules in L1527. The fractional abundance of CH4 is higher than or comparable to that found in high-mass star-forming cores by infrared observations. It is sufficiently high to trigger the efficient production of various carbon-chain molecules in a lukewarm region near the protostar, which supports the scenario of warm carbon-chain chemistry.

Abstract Copyright:

Journal keyword(s): ISM: individual: L1527 - ISM: molecules

Simbad objects: 13

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Number of rows : 13

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 [JCC87] IRAS 4A Y*O 03 29 10.49 +31 13 30.8           ~ 596 1
2 [JCC87] IRAS 4 FIR 03 29 10.9 +31 13 26           ~ 465 0
3 [JCC87] IRAS 4B Y*O 03 29 12.058 +31 13 02.05           ~ 553 0
4 LDN 1527 DNe 04 39 53 +25 45.0           ~ 495 0
5 IRAS 04368+2557 Y*O 04 39 53.97816 +26 03 09.6804           ~ 237 0
6 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 3479 0
7 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2001 1
8 SH 2-231 HII 05 39 12.9 +35 45 54           ~ 118 0
9 IRC +10216 C* 09 47 57.40632 +13 16 43.5648     10.96     C9,5e 2134 0
10 IRAS 15398-3359 Y*? 15 43 02.21016 -34 09 07.7112       18.38 21.72 ~ 128 0
11 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1035 1
12 [WBN74] NGC 7538 IRS 1 Y*O 23 13 45.318 +61 28 11.69           ~ 367 3
13 IRAS 23118+6110 Y*O 23 14 01.63 +61 27 20.2           ~ 341 0

    Equat.    Gal    SGal    Ecl

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2020.07.12-15:47:10

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