Gas phase Elemental abundances in Molecular cloudS (GEMS) - XI. The evolution of HCN, HNC, and N2H+ isotopic ratios in starless cores

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Volume 700 (August 2025)

A&A, 700 (2025) A226

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Table 9

¹⁴N/¹⁵N ratios, with the mean and standard deviation values.

Starless core	$\frac{H N^{13} C}{H^{15} N C}$ $\frac{HN^{13}C}{H^{15}NC}$	$\frac{(H N^{13} C \times 68)}{H^{15} N C}$ $\frac{(HN^{13}C\times 68)}{H^{15}NC}$	$\frac{H N C}{H^{15} N C}$ $\frac{HNC}{H^{15}NC}$	$\frac{H^{13} C N}{H C^{15} N}$ $\frac{H^{13}CN}{HC^{15}N}$	$\frac{(H^{13} C N \times 68)}{H C^{15} N}$ $\frac{(H^{13}CN\times 68)}{HC^{15}N}$	$\frac{H C N}{H C^{15} N}$ $\frac{HCN}{HC^{15}N}$
B213-C16-1	4.20 ± 0.60	280 ± 40	11.8 ± 1.7	6.1 ± 1.1	420 ± 70
B213-C12-1	4.90 ± 0.70	340 ± 50	24 ± 4	10±2	700 ± 170
B213-C1-1	4.80 ± 0.70	330 ± 50	20 ± 3	6.2 ± 1.3	420 ± 90	130 ± 30
B213-C6-1	4.40 ± 0.70	300 ± 40	11.3 ± 1.7	8±2	560 ± 140
B213-C2-1	4.00 ± 0.60	270 ± 40	12.9 ± 1.9	3.80 ± 0.60	260 ± 40
B213-C7-1	4.10 ± 0.60	280 ± 40	17±3	8±3	600 ± 200
B213-C10-1	5.80 ± 0.90	390 ± 60	26 ± 4	7.3 ± 1.4	490 ± 90
B213-C5-1	6.2 ± 1.2	420 ± 80	36 ± 7	> 4.0	> 270
1333-C2-1	3.90 ± 0.60	260 ± 40	27 ± 4	4.60 ± 0.80	310 ± 50	180 ± 30
L1448-1	4.00 ± 0.60	270 ± 40	20 ± 3	8.5 ± 1.4	580 ± 90	121 ± 19
79-C1-1	3.30 ± 0.50	230 ± 30	21 ± 3	4.50 ± 0.70	310 ± 50	102 ± 16
1333-C3-14	4.70 ± 0.70	320 ± 50	26 ± 4	7.9 ± 1.3	540 ± 90	99 ± 16
1333-C4-1	1.40 ± 0.20	95 ± 14	19±3	9.7 ± 1.4	660 ± 100	560 ± 80
1333-C7-1				6.0 ± 1.1	400 ± 70
IC348-10	3.70 ± 0.60	250 ± 40	77 ± 11	4.10 ± 0.70	280 ± 40	220 ± 40
1333-C3-1	4.60 ± 0.70	310 ± 50	86 ± 13	5.80 ± 0.90	400 ± 60	150 ± 20
1333-C1-1	3.60 ± 0.50	250 ± 40	65 ± 10	4.50 ± 0.70	300 ± 50	190 ± 30
ORI-C1-2	4.40 ± 0.60	300 ± 40	62 ± 9	5.10 ± 0.70	350 ± 50	123 ± 18
1333-C5-1	5.20 ± 0.80	350 ± 50	76 ± 12	4.70 ± 0.80	320 ± 60	190 ± 30
1333-C6-1	5.40 ± 0.80	360 ± 60	89 ± 14	6.6 ± 1.1	450 ± 80	260 ± 40
ORI-C3-1	4.50 ± 0.70	310 ± 50	103 ± 15	5.90 ± 0.90	400 ± 60	850 ± 130
IC348-1	3.80 ± 0.60	260 ± 40	88 ± 14	5.5 ± 1.0	370 ± 70	220 ± 40
ORI-C2-3	4.60 ± 0.70	310 ± 40	41 ± 6	5.20 ± 0.80	350 ± 50	140 ± 20
mean	4.36	296	44	6.3	430	240
σ	0.95	64	30	1.8	120	200

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