Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way Model
We extend a recently developed dynamically self-consistent model of the Milky Way constrained by observations from the Gaia observatory to include a radially anisotropic component in the dark matter (DM) halo, which represents the debris from the accreted Gaia-Sausage-Enceladus (GSE) galaxy. In the...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Maynooth Academic Publishing
2025-05-01
|
| Series: | The Open Journal of Astrophysics |
| Online Access: | https://doi.org/10.33232/001c.138098 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849416104314667008 |
|---|---|
| author | Lucijana Stanic Mark Eberlein Stanislav Linchakovskyy Christopher Magnoli Maryna Mesiura Luca Morf Prasenjit Saha Eugene Vasiliev |
| author_facet | Lucijana Stanic Mark Eberlein Stanislav Linchakovskyy Christopher Magnoli Maryna Mesiura Luca Morf Prasenjit Saha Eugene Vasiliev |
| author_sort | Lucijana Stanic |
| collection | DOAJ |
| description | We extend a recently developed dynamically self-consistent model of the Milky Way constrained by observations from the Gaia observatory to include a radially anisotropic component in the dark matter (DM) halo, which represents the debris from the accreted Gaia-Sausage-Enceladus (GSE) galaxy. In the new model, which we call a self-consistent Anisotropic Halo Model or scAHM, we derive distribution functions for DM velocity in heliocentric and geocentric reference frames. We compare them with the velocity distributions in the standard halo model (SHM) and another anisotropic model (SHM++). We compute predicted scattering rates in direct-detection experiments, for different target nuclei and DM particle masses. Seasonal dependencies of scattering rates are analyzed, revealing small but interesting variations in detection rates for different target nuclei and DM masses. Our findings show that the velocity distribution of the anisotropic GSE component significantly deviates from Gaussian, showing a modest impact on the detection rates. The peculiar kinematic signature of the radially anisotropic component would be most clearly observable by direction-sensitive detectors. |
| format | Article |
| id | doaj-art-eb7304689ede458ba72b5b67e8a94390 |
| institution | Kabale University |
| issn | 2565-6120 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Maynooth Academic Publishing |
| record_format | Article |
| series | The Open Journal of Astrophysics |
| spelling | doaj-art-eb7304689ede458ba72b5b67e8a943902025-08-20T03:33:17ZengMaynooth Academic PublishingThe Open Journal of Astrophysics2565-61202025-05-01810.33232/001c.138098Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way ModelLucijana StanicMark EberleinStanislav LinchakovskyyChristopher MagnoliMaryna MesiuraLuca MorfPrasenjit SahaEugene VasilievWe extend a recently developed dynamically self-consistent model of the Milky Way constrained by observations from the Gaia observatory to include a radially anisotropic component in the dark matter (DM) halo, which represents the debris from the accreted Gaia-Sausage-Enceladus (GSE) galaxy. In the new model, which we call a self-consistent Anisotropic Halo Model or scAHM, we derive distribution functions for DM velocity in heliocentric and geocentric reference frames. We compare them with the velocity distributions in the standard halo model (SHM) and another anisotropic model (SHM++). We compute predicted scattering rates in direct-detection experiments, for different target nuclei and DM particle masses. Seasonal dependencies of scattering rates are analyzed, revealing small but interesting variations in detection rates for different target nuclei and DM masses. Our findings show that the velocity distribution of the anisotropic GSE component significantly deviates from Gaussian, showing a modest impact on the detection rates. The peculiar kinematic signature of the radially anisotropic component would be most clearly observable by direction-sensitive detectors.https://doi.org/10.33232/001c.138098 |
| spellingShingle | Lucijana Stanic Mark Eberlein Stanislav Linchakovskyy Christopher Magnoli Maryna Mesiura Luca Morf Prasenjit Saha Eugene Vasiliev Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way Model The Open Journal of Astrophysics |
| title | Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way Model |
| title_full | Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way Model |
| title_fullStr | Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way Model |
| title_full_unstemmed | Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way Model |
| title_short | Dark Matter Particle Flux in a Dynamically Self-consistent Milky Way Model |
| title_sort | dark matter particle flux in a dynamically self consistent milky way model |
| url | https://doi.org/10.33232/001c.138098 |
| work_keys_str_mv | AT lucijanastanic darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel AT markeberlein darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel AT stanislavlinchakovskyy darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel AT christophermagnoli darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel AT marynamesiura darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel AT lucamorf darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel AT prasenjitsaha darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel AT eugenevasiliev darkmatterparticlefluxinadynamicallyselfconsistentmilkywaymodel |