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Home All issues Volume 686 (June 2024) A&A, 686 (2024) A59 Full HTML
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Table 1

Fitted parameters for detected and tentatively detected Band 3 species toward IRAS 16293 B.

Species N (cm−2) Tex (K) NX/NCH3OH$\[\N_{\mathrm{X}} / N_{\mathrm{CH}_3 \mathrm{OH}}\]$ # Detected lines
13CH3OH 1.2−0.2+0.4×1017$\[\1.2_{-0.2}^{+0.4} \times 10^{17}\]$ 130−20+30$\[\130_{-20}^{+30}\]$ 1.5−0.4+0.7×10−2$\[\1.5_{-0.4}^{+0.7} \times 10^{-2}\]$ 2
CH2DOH 1.5−0.3+0.1×1017$\[\1.5_{-0.3}^{+0.1} \times 10^{17}\]$ [170] 1.8−0.5+0.6×10−2$\[\1.8_{-0.5}^{+0.6} \times 10^{-2}\]$ 3
CHD2OH 1.9−0.3+0.4×1017$\[\1.9_{-0.3}^{+0.4} \times 10^{17}\]$ 170−40+40$\[\170_{-40}^{+40}\]$ 2.3−0.6+0.9×10−2$\[\2.3_{-0.6}^{+0.9} \times 10^{-2}\]$ 9
CD3OH 5.6−0.9+0.7×1016$\[\5.6_{-0.9}^{+0.7} \times 10^{16}\]$ [170] 6.9−1.8+2.4×10−3$\[\6.9_{-1.8}^{+2.4} \times 10^{-3}\]$ 1
CH3CHO 3.5−0.4+0.2×1016$\[\3.5_{-0.4}^{+0.2} \times 10^{16}\]$ 70−10+20$\[\70_{-10}^{+20}\]$ 4.3−1.0+1.5×10−3$\[\4.3_{-1.0}^{+1.5} \times 10^{-3}\]$ 3
13CH3CHO 2.1−0.3+0.3×1015$\[\2.1_{-0.3}^{+0.3} \times 10^{15}\]$ [100] 2.6−0.7+0.9×10−4$\[\2.6_{-0.7}^{+0.9} \times 10^{-4}\]$ 2
CH2DCHO 4.0−0.5+0.5×1015$\[\4.0_{-0.5}^{+0.5} \times 10^{15}\]$ [100] 4.9−1.2+1.7×10−4$\[\4.9_{-1.2}^{+1.7} \times 10^{-4}\]$ 2
CH3CDO 5.0−2.0+2.0×1015$\[\5.0_{-2.0}^{+2.0} \times 10^{15}\]$ 110−30+30$\[\110_{-30}^{+30}\]$ 6.1−2.8+3.2×10−4$\[\6.1_{-2.8}^{+3.2} \times 10^{-4}\]$ 3
CHD2CHO 3.0−0.8+0.5×1015$\[\3.0_{-0.8}^{+0.5} \times 10^{15}\]$ [100] 3.7−1.2+1.4×10−4$\[\3.7_{-1.2}^{+1.4} \times 10^{-4}\]$ 3
CH3COOH 1.0−0.2+0.6×1016$\[\1.0_{-0.2}^{+0.6} \times 10^{16}\]$ 170−70+30$\[\170_{-70}^{+30}\]$ 1.2−0.4+0.8×10−3$\[\1.2_{-0.4}^{+0.8} \times 10^{-3}\]$ 3
CH2OHCHO 4.6−0.6+0.6×1016$\[\4.6_{-0.6}^{+0.6} \times 10^{16}\]$ 280−40+20$\[\280_{-40}^{+20}\]$ 5.6−1.4+2.0×10−3$\[\5.6_{-1.4}^{+2.0} \times 10^{-3}\]$ 6
13CH2OHCHO ~2.0 × 1015 [280] ~2.4 ×10−4 2
CHDOHCHO 2.5−0.8+0.8×1015$\[\2.5_{-0.8}^{+0.8} \times 10^{15}\]$ 120−50+50$\[\120_{-50}^{+50}\]$ 3.1−1.2+1.5×10−4$\[\3.1_{-1.2}^{+1.5} \times 10^{-4}\]$ 4
CH3CH2OH 6.2−0.7+0.8×1016$\[\6.2_{-0.7}^{+0.8} \times 10^{16}\]$ 170−20+20$\[\170_{-20}^{+20}\]$ 7.6−1.8+2.7×10−3$\[\7.6_{-1.8}^{+2.7} \times 10^{-3}\]$ 5
a-a-CH2DCH2OH 2.4−0.3+0.5×1016$\[\2.4_{-0.3}^{+0.5} \times 10^{16}\]$ [170] 3.0−0.7+1.1×10−3$\[\3.0_{-0.7}^{+1.1} \times 10^{-3}\]$ 1
a-CH3CHDOH 2.1−0.3+0.4×1016$\[\2.1_{-0.3}^{+0.4} \times 10^{16}\]$ [170] 2.5−0.6+1.0×10−3$\[\2.5_{-0.6}^{+1.0} \times 10^{-3}\]$ 3
CH3OCH3 8.5−2.5+2.5×1016$\[\8.5_{-2.5}^{+2.5} \times 10^{16}\]$ 100−20+20$\[\100_{-20}^{+20}\]$ 1.0−0.4+0.5×10−2$\[\1.0_{-0.4}^{+0.5} \times 10^{-2}\]$ 10
CH3OCHO 1.0−0.2+0.1×1017$\[\1.0_{-0.2}^{+0.1} \times 10^{17}\]$ 140−30+20$\[\140_{-30}^{+20}\]$ 1.2−0.4+0.4×10−2$\[\1.2_{-0.4}^{+0.4} \times 10^{-2}\]$ 10
aGg′-(CH2OH)2 ~1.4 ×1017 [160] ~1.7 ×10−2 15
gGg′-(CH2OH)2 5.0−1.4+1.7×1016$\[\5.0_{-1.4}^{+1.7} \times 10^{16}\]$ 160−40+40$\[\160_{-40}^{+40}\]$ 6.1−2.1+2.9×10−3$\[\6.1_{-2.1}^{+2.9} \times 10^{-3}\]$ 15
D2CO 6.9−0.6+0.6×1015$\[\6.9_{-0.6}^{+0.6} \times 10^{15}\]$ [100] 8.5−1.9+2.9×10−4$\[\8.5_{-1.9}^{+2.9} \times 10^{-4}\]$ 1
HCCCN 6.2−0.8+0.9×1013$\[\6.2_{-0.8}^{+0.9} \times 10^{13}\]$ [100] 7.6−1.8+2.8×10−6$\[\7.6_{-1.8}^{+2.8} \times 10^{-6}\]$ 1
CH3CH2CN 1.4−0.1+0.2×1016$\[\1.4_{-0.1}^{+0.2} \times 10^{16}\]$ [100] 1.8−0.4+0.7×10−3$\[\1.8_{-0.4}^{+0.7} \times 10^{-3}\]$ 1
NH2CHO 5.6−1.1+1.2×1016$\[\5.6_{-1.1}^{+1.2} \times 10^{16}\]$ [300] 6.8−1.9+2.7×10−3$\[\6.8_{-1.9}^{+2.7} \times 10^{-3}\]$ 1
CH3COCH3 1.6−0.5+0.6×1016$\[\1.6_{-0.5}^{+0.6} \times 10^{16}\]$ 130−20+20$\[\130_{-20}^{+20}\]$ 2.0−0.7+1.0×10−3$\[\2.0_{-0.7}^{+1.0} \times 10^{-3}\]$ 17
t-HCOOH 7.7−1.1+1.1×1016$\[\7.7_{-1.1}^{+1.1} \times 10^{16}\]$ [300] 9.5−2.4+3.4×10−3$\[\9.5_{-2.4}^{+3.4} \times 10^{-3}\]$ 1
c-C2H4O 5.5−0.5+0.7×1015$\[\5.5_{-0.5}^{+0.7} \times 10^{15}\]$ [100] 6.7−1.5+2.4×10−4$\[\6.7_{-1.5}^{+2.4} \times 10^{-4}\]$ 2
c-C2H3DO 1.2−0.2+0.2×1015$\[\1.2_{-0.2}^{+0.2} \times 10^{15}\]$ [100] 4.5−0.4+0.5×10−15$\[\1.5_{-0.4}^{+0.5} \times 10^{-4}\]$ 2
CH3SH 4.5−0.7+0.5×1015$\[\4.5_{-0.7}^{+0.5} \times 10^{15}\]$ [100] 5.5−1.4+1.9×10−4$\[\5.5_{-1.4}^{+1.9} \times 10^{-4}\]$ 2
HOCH2CN 1.0−0.1+0.1×1015$\[\1.0_{-0.1}^{+0.1} \times 10^{15}\]$ [100] 1.2−0.3+0.4×10−4$\[\1.2_{-0.3}^{+0.4} \times 10^{-4}\]$ 2

Notes. Measured column densities toward the 0.5″ offset position from B in a ~1″ beam. If a source size of 0.5″ was assumed, these column densities would increase by a factor of five (i.e., 0.52+120.52$\[\\frac{0.5^2+1^2}{0.5^2}\]$). The major isotopologue of methanol was detected, but its column density was calculated by scaling the 13CH3OH column density by 12C/13C = 68 (Milam et al. 2005). The FWHM for all molecules is ~1.8 ± 0.5 km s−1. Species whose excitation temperature is fixed have their temperature given in square brackets. The right-most column gives an estimate of the number of relatively unblended lines that were detected for each molecule. Those detected with only one line should be taken with caution. However, we note that all of these species are detected in PILS (see the text for references).

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