The ALMA Protostellar Interferometric Line Survey (PILS) - First results from an unbiased submillimeter wavelength line survey of the Class 0 protostellar binary IRAS 16293-2422 with ALMA

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Volume 595 (November 2016)

A&A, 595 (2016) A117

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Table 4

Derived column densities for the isotopologues of glycolaldehyde and abundances relative to the main isotopologue.

Species	N^a	N/N(CH₂OHCHO) ^b
	[cm^-2]

CH₂OHCHO	6.8 × 10¹⁶	...
CHDOHCHO	7.1 × 10¹⁵	0.10 (9.6)
CH₂ODCHO	3.2 × 10¹⁵	0.047 (21)
CH₂OHCDO	3.5 × 10¹⁵	0.052 (19)
¹³CH₂OHCHO	2.5 × 10¹⁵ ^c	0.037 (27)^c
CH₂OH¹³CHO	2.5 × 10¹⁵ ^c	0.037 (27)^c

Notes.

^(a)

Column density of the isotopologue corrected for the vibrational contributions at 300 K.

^(b)

Column density of isotopologue relative to that of the main species. The number in parentheses gives the inverse ratio: traditionally the first number is quoted for measurements of the deuterated species, while the number in parentheses is typically quoted for ¹²C/¹³C measurements.

^(c)

The ¹³CH₂OHCHO and CH₂OH¹³CHO fitted with a common column density for both owing to the relatively low number of lines seen for the two species.

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