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Home All issues Volume 694 (February 2025) A&A, 694 (2025) A27 Full HTML
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Table 2

Spectroscopic parameters of the observed lines.

Molecule Transition Rest frequency Eup TA*${\rm{T}}_A^*$ vLSR FWHM W
(MHz) (K) K km s−1 km s−1 K km s−1
C17O N=2–1 F=7/2–5/2 and 5/2–3/2 224714.19(8) (a) 16 1.43(1) 3.787(2) 1.040(4) 1.586(6)
C17O N=2–1 F=3/2–3/2 and 5/2–3/2 224715.24(8) (a) 16 0.48(1) 3.824(1) 0.85(1) 0.434(5)
CN N=2–1, J=3/2–1/2, F=1/2–1/2 226663.693(2) 16 0.37(8) 3.58(3) 0.58(9) 0.23(3)
CS N=5–4 244935.556(3) 35 0.81(4) 3.830(9) 1.13(2) 0.97(2)
CS N=6–5 293912.086(3) 49 0.16(2) 3.89(2) 1.12(5) 0.193(8)
SO N J=2 2–1 2 309502.44(6) 19 0.219(3) 3.68(2) 0.57(5) 0.134(8)
DCO+ N=4–3 288143.858(3) 35 3.16(2) 3.589(1) 0.573(2) 1.929(6)
HDS JKaKc=101−000${{\bf{J}}_{{K_a}{K_c}}} = {1_{01}} - {0_{00}}$ 244555.6(1) 12 0.20(1) 3.723(7) 0.44(2) 0.110(3)
HDO JKaKc=101−000${{\bf{J}}_{{K_a}{K_c}}} = {1_{01}} - {0_{00}}$ 464924.5200 22 0.343(3) 3.530(8) 0.40(2) 0.145(6)
HNC J=3–2 271981.1420(b) 26 2.34(2) 3.45(1) 0.51(3) 1.27(6)
DNC J=3–2 228910.4810 (b) 22 2.103(1) 3.600(1) 0.640(2) 1.433(2)
DNC J=4–3 305206.22(3) (b) 37 0.69(2) 3.534(4) 0.518(9) 0.380(6)
o-NH2D JKaKc=221−211vt=1−0, F=1−1,2−2, and 3−3${{\rm{J}}_{{K_a}{K_c}}} = {2_{21}} - {2_{11}}{{\rm{v}}_t} = 1 - 0,{\rm{F}} = 1 - 1,2 - 2{\rm{, and }}3 - 3$ 305723.78(3)(c) 72 0.14(2) 3.63(2) 0.55(6) 0.083(6)
ND3 J K F=1 0 1–00 1 309908.46(10) 14 0.215(3) 3.69(1) 0.5(1) 0.11(2)
ND3 J K F=1 0 2–0 0 1 309909.69(10) 14 0.439(3) 3.67(1) 0.40(3) 0.19(1)
ND3 J K F=1 0 0–0 0 1 309911.53(10) 14 0.05(2) 3.68 (d) 0.45 (d) 0.02(1)
H2CO JKaKc=404−303${{\rm{J}}_{{K_a}{K_c}}} = {4_{04}} - {3_{03}}$ 290623.40(1) 35 0.72(2) 3.623(4) 0.62(1) 0.469(7)
HDCO JKaKc=413−313 ${{\rm{J}}_{{K_a}{K_c}}} = {4_{13}} - {3_{13}}$ 246924.6(1) 38 0.43(1) 3.563(3) 0.528(8) 0.241(3)
D2CO JKaKc=404−303${{\rm{J}}_{{K_a}{K_c}}} = {4_{04}} - {3_{03}}$ 231410.23(5) 28 0.493(1) 3.703(3) 0.544(8) 0.134(8)
D2CO JKaKc=413−312${{\rm{J}}_{{K_a}{K_c}}} = {4_{13}} - {3_{12}}$ 245532.75(5) 35 0.117(9) 3.723(7) 0.44(2) 0.110(3)
CH3OH JKaKc=515−414${{\rm{J}}_{{K_a}{K_c}}} = {5_{15}} - {4_{14}}$ 241767.234(4) 40 0.35(4) 3.69(2) 0.72(4) 0.27(1)
CH3OH JKaKc=505−404${{\rm{J}}_{{K_a}{K_c}}} = {5_{05}} - {4_{04}}$ 241791.352(4) 35 0.44(4) 3.68(1) 0.76(3) 0.36(1)
CH3OH JKaKc=616−515${{\rm{J}}_{{K_a}{K_c}}} = {6_{16}} - {5_{15}}$ 290069.747(5) 54 0.10(2) 3.62(3) 0.70(7) 0.074(6)
CH3OH JKaKc=606−505${{\rm{J}}_{{K_a}{K_c}}} = {6_{06}} - {5_{05}}$ 290110.637(4) 49 0.12(2) 3.68(2) 0.78(6) 0.104(7)
c-C3H2 JKaKc=321−212${{\rm{J}}_{{K_a}{K_c}}} = {3_{21}} - {2_{12}}$ 244222.151(4) 18 0.133(9) 3.66(1) 0.77(3) 0.110(3)

Notes. The numbers in brackets denote 1σ uncertainties in units of the last quoted digit. The frequencies in the table are reported in the CDMS and JPL catalogues (Müller et al. (2005); Pickett et al. (1998) and are derived from the laboratory work in the following: Bocquet et al. (1999); Bechtel et al. (2006); Clark & De Lucia (1976); Helminger & Gordy (1969); Messer et al. (1984); Cazzoli et al. (2002); Klapper et al. (2003); Dixon & Woods (1977); Caselli & Dore (2005); Helminger et al. (1971); Brünken et al. (2006); Saykally et al. (1976); Melosso et al. (2021); Zakharenko et al. (2015); Müller & Lewen (2017); Xu et al. (2008); Bogey et al. (1986)). (a) The frequency is averaged between two components, not resolvable in this work, reported in Cazzoli et al. (2002). (b) This frequency does not take into account the hyperfine splitting. (c) The frequency is averaged between three hyperfine components. (d) For the fit of this line, the FWHM and vLSR were fixed to the average values of the other two hyperfine components.

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