The BAyesian STellar algorithm (BASTA) : A fitting tool for stellar studies, asteroseismology, exoplanets, and Galactic archaeology
(2022) In Monthly Notices of the Royal Astronomical Society 509(3). p.4344-4364- Abstract
We introduce the public version of the BAyesian STellar Algorithm (BASTA), an open-source code written in Python to determine stellar properties based on a set of astrophysical observables. BASTA has been specifically designed to robustly combine large data sets that include asteroseismology, spectroscopy, photometry, and astrometry. We describe the large number of asteroseismic observations that can be fit by the code and how these can be combined with atmospheric properties (as well as parallaxes and apparent magnitudes), making it the most complete analysis pipeline available for oscillating main-sequence, subgiant, and red giant stars. BASTA relies on a set of pre-built stellar isochrones or a custom-designed library of stellar... (More)
We introduce the public version of the BAyesian STellar Algorithm (BASTA), an open-source code written in Python to determine stellar properties based on a set of astrophysical observables. BASTA has been specifically designed to robustly combine large data sets that include asteroseismology, spectroscopy, photometry, and astrometry. We describe the large number of asteroseismic observations that can be fit by the code and how these can be combined with atmospheric properties (as well as parallaxes and apparent magnitudes), making it the most complete analysis pipeline available for oscillating main-sequence, subgiant, and red giant stars. BASTA relies on a set of pre-built stellar isochrones or a custom-designed library of stellar tracks, which can be further refined using our interpolation method (both along and across stellar tracks or isochrones). We perform recovery tests with simulated data that reveal levels of accuracy at the few percent level for radii, masses, and ages when individual oscillation frequencies are considered, and show that asteroseismic ages with statistical uncertainties below 10 per cent are within reach if our stellar models are reliable representations of stars. BASTAis extensively documented and includes a suite of examples to support easy adoption and further development by new users.
(Less)
- author
- organization
- publishing date
- 2022-01-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- asteroseismology, methods: numerical, methods: statistical, stars: fundamental parameters
- in
- Monthly Notices of the Royal Astronomical Society
- volume
- 509
- issue
- 3
- pages
- 21 pages
- publisher
- Oxford University Press
- external identifiers
-
- scopus:85122323583
- ISSN
- 0035-8711
- DOI
- 10.1093/mnras/stab2911
- language
- English
- LU publication?
- yes
- id
- 2ad390ef-7106-4f5f-97b0-e274ffac3bce
- date added to LUP
- 2022-02-02 11:44:46
- date last changed
- 2024-04-21 10:25:04
@article{2ad390ef-7106-4f5f-97b0-e274ffac3bce, abstract = {{<p>We introduce the public version of the BAyesian STellar Algorithm (BASTA), an open-source code written in Python to determine stellar properties based on a set of astrophysical observables. BASTA has been specifically designed to robustly combine large data sets that include asteroseismology, spectroscopy, photometry, and astrometry. We describe the large number of asteroseismic observations that can be fit by the code and how these can be combined with atmospheric properties (as well as parallaxes and apparent magnitudes), making it the most complete analysis pipeline available for oscillating main-sequence, subgiant, and red giant stars. BASTA relies on a set of pre-built stellar isochrones or a custom-designed library of stellar tracks, which can be further refined using our interpolation method (both along and across stellar tracks or isochrones). We perform recovery tests with simulated data that reveal levels of accuracy at the few percent level for radii, masses, and ages when individual oscillation frequencies are considered, and show that asteroseismic ages with statistical uncertainties below 10 per cent are within reach if our stellar models are reliable representations of stars. BASTAis extensively documented and includes a suite of examples to support easy adoption and further development by new users. </p>}}, author = {{Aguirre Børsen-Koch, V. and Rørsted, J. L. and Justesen, A. B. and Stokholm, A. and Verma, K. and Winther, M. L. and Knudstrup, E. and Nielsen, K. B. and Sahlholdt, C. and Larsen, J. R. and Cassisi, S. and Serenelli, A. M. and Casagrande, L. and Christensen-Dalsgaard, J. and Davies, G. R. and Ferguson, J. W. and Lund, M. N. and Weiss, A. and White, T. R.}}, issn = {{0035-8711}}, keywords = {{asteroseismology; methods: numerical; methods: statistical; stars: fundamental parameters}}, language = {{eng}}, month = {{01}}, number = {{3}}, pages = {{4344--4364}}, publisher = {{Oxford University Press}}, series = {{Monthly Notices of the Royal Astronomical Society}}, title = {{The BAyesian STellar algorithm (BASTA) : A fitting tool for stellar studies, asteroseismology, exoplanets, and Galactic archaeology}}, url = {{http://dx.doi.org/10.1093/mnras/stab2911}}, doi = {{10.1093/mnras/stab2911}}, volume = {{509}}, year = {{2022}}, }