Physicochemical models: source-tailored or generic?
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Physicochemical models : source-tailored or generic? / Kulterer, Beatrice M.; Drozdovskaya, Maria N.; Coutens, Audrey; Manigand, Sebastien; Stephan, Gwendoline.
I: Monthly Notices of the Royal Astronomical Society, Bind 498, Nr. 1, 14.08.2020, s. 276-291.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Physicochemical models
T2 - source-tailored or generic?
AU - Kulterer, Beatrice M.
AU - Drozdovskaya, Maria N.
AU - Coutens, Audrey
AU - Manigand, Sebastien
AU - Stephan, Gwendoline
PY - 2020/8/14
Y1 - 2020/8/14
N2 - 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.
AB - 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.
KW - astrochemistry
KW - protoplanetary discs
KW - stars: protostars
KW - ISM: abundances
KW - DENSE INTERSTELLAR CLOUDS
KW - ALMA-PILS SURVEY
KW - IRAS 16293-2422
KW - PRESTELLAR CORES
KW - STARLESS CORES
KW - DARK CLOUDS
KW - EVOLUTION
KW - PHOTODESORPTION
KW - PROTOSTARS
KW - GAS
U2 - 10.1093/mnras/staa2443
DO - 10.1093/mnras/staa2443
M3 - Journal article
VL - 498
SP - 276
EP - 291
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 1
ER -
ID: 252293727