Large-field CO (1–0) observations toward the Galactic historical supernova remnants: a large cavity around Tycho’s supernova remnant

X. Chen; F. Xiong; J. Yang

doi:10.1051/0004-6361/201630003

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Volume 604 (August 2017)

A&A, 604 (2017) A13

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Table 1

H₂ gas properties of the objects around Tycho’s SNR.

Object	Column density^a	Gas mass^a	Column density^b	Gas mass^b
	(×10²⁰ cm^-2)	(×10³ M_Sun)	(×10²⁰ cm^-2)	(×10³ M_Sun)

SE cloud	11.9 ± 2.4	21.9 ± 4.4	6.1 ± 1.2	3.0 ± 0.6
NE cloud	10.7 ± 2.1	6.9 ± 1.4	7.7 ± 1.5	1.0 ± 0.2
West cloud	8.6 ± 1.7	9.3 ± 1.9	6.6 ± 1.3	0.5 ± 0.1
Stream_SE	7.9 ± 1.6	0.49 ± 0.10	3.9 ± 0.8	0.05 ± 0.01
Stream_NE	7.8 ± 1.6	0.56 ± 0.11	4.7 ± 0.9	0.05 ± 0.01
Stream_NW	5.3 ± 1.1	0.48 ± 0.10	2.9 ± 0.6	0.01 ± 0.005
Inner rim	8.9 ± 1.8	1.3 ± 0.3	4.3 ± 0.9	0.1 ± 0.02
Cavity	1.5 ± 0.3	2.7 ± 0.5	0.9 ± 0.2	2.0 ± 0.4

Notes.

^(a)

Results estimated from the MWISP ¹²CO observations and CO-to-H₂ factor (1.8 × 10²⁰ cm^-2 K^-1 km^-1 s; see text).

^(b)

Results estimated from the MWISP ¹²CO and ¹³CO observations, assuming LTE condition.

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