Query : 2015A&A...582L...3V

2015A&A...582L...3V - Astronomy and Astrophysics, volume 582, L3-3 (2015/10-1)

Hyperfine structure of the cyanomethyl radical (CH2CN) in the L1544 prestellar core.


Abstract (from CDS):

The L1544 prestellar core has been observed as part of the ASAI IRAM Large Program at 3mm. These observations led to the detection of many complex molecules. In this Letter we report the detection of the cyanomethyl radical for the first time in a prototypical prestellar core, which is possible through the high sensitivity of the IRAM EMIR receiver. A complex structure in which we suspect the presence of the hyperfine transitions of the ortho and para forms is observed thanks to the high spectral resolution of ∼50kHz. We computed all transition frequencies and line intensities for all transitions including satellite hyperfine components for the ortho and para forms of CH2CN at the frequencies observed by ASAI. We report the first detection of the fine and hyperfine structure of the ortho and para forms of the cyanomethyl radical at ∼101GHz, resolved in this cold dense core.

Abstract Copyright:

Journal keyword(s): astrochemistry - line: identification - molecular data - radiative transfer

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4099 0
2 TMC-1 MoC 04 41 45.9 +25 41 27           ~ 1568 0
3 LDN 1544 DNe 05 04 16.6 +25 10 48           ~ 805 0
4 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2150 1

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