Complex organic molecules in the interstellar medium: IRAM 30 m line survey of Sagittarius B2(N) and (M)

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This article has an erratum: [https://doi.org/10.1051/0004-6361/201321096e]

Table 2

Velocity ranges and isotopic ratios of the Galactic emission and absorption components along the line of sight of Sgr B2.

Velocity range^a	¹²C/¹³C^b	¹⁶O/¹⁸O^c	¹⁸O/¹⁷O^d	¹⁴N/¹⁵N^e	Location^a
(km s^-1)
(1)	(2)	(3)	(4)	(5)	(6)

~ 62	20	250	2.88	300	Galactic Center, Sgr B2
39–25	40	327	4.16	350	Scutum/Crux arm
22–12	60	560	4.16	450	Sagittarius arm
8–− 9	20	250	2.88	300	Galactic Center
−13–− 50	40	327	4.16	350	3-kpc arm
< −53	20	250	2.88	300	Galactic Center

Notes. The following isotopic ratios were assumed to be constant: ³²S/³⁴S = 22^c, ³⁴S/³³S = 5^f, ²⁸SiO/²⁹SiO = 20^g, ²⁹SiO/³⁰SiO = 1.5^g.

Reference. and references therein;

^(a)

Menten et al. (2011)

^(b)

Milam et al. (2005);

^(c)

Wilson & Rood (1994);

^(d)

Wouterloot et al. (2008);

^(e)

Dahmen et al. (1995);

^(f)

Nummelin et al. (2000);

^(g)

Penzias (1981).

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