Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI

Home

All issues

Volume 675 (July 2023)

A&A, 675 (2023) A151

Full HTML

Open Access

This article has an erratum: [https://doi.org/10.1051/0004-6361/202245659e]

Table 5.

Inferred gas properties traced by HNCO and SiO from the Bayesian inference processes over four selected regions across GMC1a-9a (Cols. 2–5).

GMC	Species	log₁₀(n_H₂)	T_kin	log₁₀(N_species)	τ_dissipation	τ_shock	τ_{shock, joint}
		[cm⁻³]	[K]	[cm⁻²]	[yr]		[yr]
1a	HNCO				∼10⁴	≥τ_dissipation	∼10⁵
	SiO				∼10⁵	∼τ_dissipation	–

2b	HNCO				∼10³	≫τ_dissipation	≥10⁵
	SiO				∼10⁵	≥τ_dissipation	–

3 ^(a)	HNCO	≥6	< 100		10¹	≫τ_dissipation	∼10³
	SiO				∼10³	∼τ_dissipation

4	HNCO				∼10¹	≫τ_dissipation	∼10³
	SiO				∼10³	∼τ_dissipation	–

6	HNCO				∼10¹	≫τ_dissipation	∼10³
	SiO				∼10³	∼τ_dissipation	–

7	HNCO				∼10¹	≫τ_dissipation	∼10⁴
	SiO				∼10⁴	∼τ_dissipation	–

8a	HNCO				∼10³	≫τ_dissipation	≥10⁵
	SiO				∼10⁵	≥τ_dissipation	–

9a	HNCO				∼10³	≫τ_dissipation	∼10⁵
	SiO				∼10⁵	∼τ_dissipation	–

Notes. We also list the relevant shock timescales derived in Sect. 5.2 (Cols. 6–8).

^(a)

The bi-modality of inferred gas properties in GMC 3 traced by HNCO is explained in Sect. 4.1.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.