Physicochemical models: source-tailored or generic?

Kulterer, Beatrice M.; Drozdovskaya, Maria N.; Coutens, Audrey; Manigand, Sébastien; Stéphan, Gwendoline (2020). Physicochemical models: source-tailored or generic? Monthly notices of the Royal Astronomical Society, 498(1), pp. 276-291. Oxford University Press 10.1093/mnras/staa2443

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Physicochemical models can be powerful tools to trace the chemical evolution of a protostellar system and allow to constrain its physical conditions at formation. The aim of this work is to assess whether source-tailored modelling is needed to explain the observed molecular abundances around young, low-mass protostars or if, and to what extent, generic models can improve our understanding of the chemistry in the earliest stages of star formation. The physical conditions and the abundances of simple, most abundant molecules based on three models are compared. After establishing the discrepancies between the calculated chemical output, the calculations are redone with the same chemical model for all three sets of physical input parameters. With the differences arising from the chemical models eliminated, the output is compared based on the influence of the physical model. Results suggest that the impact of the chemical model is small compared to the influence of the physical conditions, with considered time-scales having the most drastic effect. Source-tailored models may be simpler by design; however, likely do not sufficiently constrain the physical and chemical parameters within the global picture of star-forming regions. Generic models with more comprehensive physics may not provide the optimal match to observations of a particular protostellar system, but allow a source to be studied in perspective of other star-forming regions.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Center for Space and Habitability (CSH)

UniBE Contributor:

Kulterer, Beatrice Marie and Drozdovskaya, Maria N

Subjects:

500 Science > 520 Astronomy
500 Science
500 Science > 530 Physics

ISSN:

0035-8711

Publisher:

Oxford University Press

Language:

English

Submitter:

Danielle Zemp

Date Deposited:

13 Apr 2021 12:25

Last Modified:

13 Apr 2021 12:34

Publisher DOI:

10.1093/mnras/staa2443

BORIS DOI:

10.48350/154800

URI:

https://boris.unibe.ch/id/eprint/154800

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