Protostellar accretion traced with chemistry - Comparing synthetic C18O maps of embedded protostars to real observations

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Table 2

Measured extents.

	R_CO (AU)			Ratio^a	Abund. radius (AU)		Ratio^a	Δt_peak (kyr)^b	L_peak (L_⊙)^b

	Predict	No hist.	Hist.		No hist.	Hist.

s4n109	820	730	720	1.0	2660	5900	2.2	...^c	...^c
s75n89	90	170	290	1.7	330	740	2.3	143	5.8
s156n98	110	220	360	1.6	240	480	2.0	8	13.6
s257n132	220	240	280	1.2	540	750	1.4	4	8.8

Notes.

^(a)

The ratios are calculated between the measured extents with luminosity history, relative to no history.

^(b)

Time since peak luminosity and the luminosity of the peak.

^(c)

The luminosity of this object is highly variable and it is not possible to determine one single luminosity peak in the past that is responsible for the extended abundance profile. The luminosity of the object topped at 900 L_⊙650 kyr prior to the time of the snapshot.

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