EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 690 (October 2024) A&A, 690 (2024) A205 Full HTML
Open Access

Table 2

Ice column densities of candidate species derived from the least-squares and MCMC fittings to the JWST/MIRI-MRS spectra of NGC 1333 IRAS 2A and B1-c.

Source B1-c NGC 1333 IRAS 2A (a)
Species Band λ (μm) Mode (b) A (10−18 cm−2) Ref.(c) Nice (1017 cm−2) X/CH3OH (%) X/H2O (%) Tice (K) Mixture Nice (1017 cm−2) X/CH3OH (%) X/H2O (%) Tice (K) Mixture
H2O 13.2 libration 32 1,2 250±17 − ≡ 100 15 pure 300±12 − ≡ 100 15,160 pure
CH3OH 9.74 CO str. 15.6 (d) 3 30±10 ≡ 100 11.9±4.1 − Gaussian 19±4 ≡ 100 6.3±1.4 − Gaussian
CH4 7.67 CH4 def. 8.4 1,2,4 9.3±5.1 30.9±19.8 3.7±2.0 13 w/H2O 4.9−3.2+7.5$\[4.9_{-3.2}^{+7.5}\]$ 26−18+40$\[26_{-18}^{+40}\]$ 1.6−1.1+2.5$\[1.6_{-1.1}^{+2.5}\]$ 15 w/H2O
SO2 7.60 SO2 str. 34 4 <0.47 <1.6 <0.19 10 w/CH3OH 0.6−0.4+1.9$\[0.6_{-0.4}^{+1.9}\]$ 3.2−2.2+10$\[3.2_{-2.2}^{+10}\]$ 0.2−0.1+0.6$\[0.2_{-0.1}^{+0.6}\]$ 10 w/CH3OH
OCN− 7.62 2v2 7.45 5 4.1 ±2.2 13.6±8.7 1.6±0.9 15 NH3+HNCO (e) 3.7−3.3+6.6$\[3.7_{-3.3}^{+6.6}\]$ 19−17+35$\[19_{-17}^{+35}\]$ 1.2−1.1+2.2$\[1.2_{-1.1}^{+2.2}\]$ 15 NH3+HNCO(e)
H2CO 8.02 CH2 rock. 1.5 1 4.5±1.3 14.9±6.7 1.8±0.6 15 pure 12.4−6.6+19.7$\[12.4_{-6.6}^{+19.7}\]$ 65−37+105$\[65_{-37}^{+105}\]$ 4.1−2.2+6.6$\[4.1_{-2.2}^{+6.6}\]$ 15 w/CO, CH3OH, CH3OCHO
HCOO− 7.38 CO str. 17 7 0.93±0.51 3.1±2.0 0.37±0.21 14 H2O+NH3 +HCOOH (e) 1.4−0.4+2.4$\[1.4_{-0.4}^{+2.4}\]$ 7.4−2.6+12.7$\[7.4_{-2.6}^{+12.7}\]$ 0.5−0.1+0.80$\[0.5_{-0.1}^{+0.80}\]$ 14 H2O+NH3 +HCOOH(e)
HCOOH 8.23 CO str. 29 1 1.1±0.6 3.7±2.4 0.44±0.25 15 w/H2O 3.0−1.7+5.3$\[3.0_{-1.7}^{+5.3}\]$ 16−10+28$\[16_{-10}^{+28}\]$ 1.0−0.6+1.8$\[1.0_{-0.6}^{+1.8}\]$ 15 w/H2O, CH3OH
CH3CHO 7.42 CH3 sym. def. + CH wag. 4.1 8,9 1.9±1.0 6.2±4.0 0.74±0.41 15 w/H2O 2.2−1.4+2.8$\[2.2_{-1.4}^{+2.8}\]$ 12−8+15$\[12_{-8}^{+15}\]$ 0.7−0.5+0.9$\[0.7_{-0.5}^{+0.9}\]$ 16 w/H2O
C2H5OH 7.24 CH3 sym. def. 2.4 10 2.1 ±1.2 7.1 ±4.6 0.85±0.47 15 w/H2O 3.7−0.5+4.5$\[3.7_{-0.5}^{+4.5}\]$ 19−5+24$\[19_{-5}^{+24}\]$ 1.2−0.2+1.5$\[1.2_{-0.2}^{+1.5}\]$ 15 w/H2O
CH3OCH3 8.59 COC str. + CH3 rock. 5.55 (d) 9 0.51±0.28 1.7±1.0 0.20±0.11 15 w/H2O <5.8 <13 <0 8 −
CH3OCHO 8.25 CO str. 24.9 11 0.48±0.26 1.6±1.0 0.19±0.11 15 w/CO, H2CO, CH3OH 0.2−0.1+0.4$\[0.2_{-0.1}^{+0.4}\]$ 1.0−0.6+2.1$\[1.0_{-0.6}^{+2.1}\]$ 0.07−0.03+0.13$\[0.07_{-0.03}^{+0.13}\]$ 15 w/CO, H2CO, CH3OH
CH3COOH 7.82 OH bend. 45.7 5 <0.21 <0.7 <0.08 10 w/H2O 0.9−0.6+1.3$\[0.9_{-0.6}^{+1.3}\]$ 4.7−3.3+6.9$\[4.7_{-3.3}^{+6.9}\]$ 0.3−0.2+0.4$\[0.3_{-0.2}^{+0.4}\]$ 10 w/H2O
CH3COCH3 7.33 CH3 sym. str. 10.2 (d) 12,13 1.7±1.0 5.8±3.7 0.69±0.38 15 w/H2O, CO2 <1.1 <6 <0.4 15 w/H2O
CH3CN 7.27 CH3 sym. def. 1.2 14 <3.1 <10 <1.2 15 w/H2O, CO2 <5.0 <26 <1.7 15 w/H2O

Notes. (a)Results obtained from Rocha et al. (2024). (b)Abbreviation of vibrational modes: def. = deformation; str. = stretching; rock. = rocking; sym. = symmetric; wag. = wagging; bend. = bending. (c)References of band strengths A: [1] Bouilloud et al. (2015); [2] Hudgins et al. (1993); [3] Luna et al. (2018); [4] Boogert et al. (1997); [5] Rocha et al. (2024); [7] Schutte et al. (1999); [8] Hudson & Ferrante (2020); [9] Terwisscha van Scheltinga et al. (2018); [10] Boudin et al. (1998); [11] Terwisscha van Scheltinga et al. (2021); [12] Hudson et al. (2018); [13] Rachid et al. (2020); [14] Rachid et al. (2022). (d)See Appendix H for additional details. (e)These constituents are not added intentionally, but are ingredients to form the target ions (i.e., OCN− and HCOO−).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.