The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster Substructure
The abundance, distribution, and inner structure of satellites of galaxy clusters can be sensitive probes of the properties of dark matter. We run 30 cosmological zoom-in simulations with self-interacting dark matter (SIDM), with a velocity-dependent cross section, to study the properties of subhalo...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ac68e9 |
| _version_ | 1797694462614306816 |
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| author | Joy Bhattacharyya Susmita Adhikari Arka Banerjee Surhud More Amit Kumar Ethan O. Nadler Suchetana Chatterjee |
| author_facet | Joy Bhattacharyya Susmita Adhikari Arka Banerjee Surhud More Amit Kumar Ethan O. Nadler Suchetana Chatterjee |
| author_sort | Joy Bhattacharyya |
| collection | DOAJ |
| description | The abundance, distribution, and inner structure of satellites of galaxy clusters can be sensitive probes of the properties of dark matter. We run 30 cosmological zoom-in simulations with self-interacting dark matter (SIDM), with a velocity-dependent cross section, to study the properties of subhalos within cluster-mass hosts. We find that the abundance of subhalos that survive in the SIDM simulations are suppressed relative to their cold dark matter (CDM) counterparts. Once the population of disrupted subhalos—which may host orphan galaxies—is taken into account, satellite galaxy populations in CDM and SIDM models can be reconciled. However, even in this case, the inner structures of subhalos are significantly different in the two dark matter models. We study the feasibility of using the weak-lensing signal from the subhalo density profiles to distinguish between the cold and self-interacting dark matter while accounting for the potential contribution of orphan galaxies. We find that the effects of self-interactions on the density profile of subhalos can appear degenerate with subhalo disruption in CDM, when orphans are accounted for. With current error bars from the Subaru Hyper Suprime-Cam Strategic Program, we find that subhalos in the outskirts of clusters (where disruption is less prevalent) can be used to constrain dark matter physics. In the future, the Vera C. Rubin Observatory Legacy Survey of Space and Time will give precise measurements of the weak-lensing profile and can be used to constrain σ _T / m at the ∼1 cm ^2 g ^−1 level at v ∼ 2000 km s ^−1 . |
| first_indexed | 2024-03-12T02:58:20Z |
| format | Article |
| id | doaj.art-aa9ed00c7e8a4c388effebce68f14731 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T02:58:20Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-aa9ed00c7e8a4c388effebce68f147312023-09-03T15:08:16ZengIOP PublishingThe Astrophysical Journal1538-43572022-01-0193213010.3847/1538-4357/ac68e9The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster SubstructureJoy Bhattacharyya0https://orcid.org/0000-0001-6442-5786Susmita Adhikari1https://orcid.org/0000-0002-0298-4432Arka Banerjee2https://orcid.org/0000-0002-5209-1173Surhud More3https://orcid.org/0000-0002-2986-2371Amit Kumar4Ethan O. Nadler5https://orcid.org/0000-0002-1182-3825Suchetana Chatterjee6https://orcid.org/0000-0002-3236-2853Department of Astronomy, The Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USA ; bhattacharyya.37@osu.edu; Center for Cosmology and Astro-Particle Physics, The Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USA; Department of Physics, Presidency University , 86/1 College Street, Kolkata 700073, IndiaDepartment of Physics, Indian Institute of Science Education and Research , Homi Bhabha Road, Pashan, Pune 411008, India; Department of Astronomy and Astrophysics, University of Chicago , Chicago, IL 60637, USA; Kavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University , Stanford, CA 94305, USADepartment of Physics, Indian Institute of Science Education and Research , Homi Bhabha Road, Pashan, Pune 411008, India; Kavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University , Stanford, CA 94305, USA; Fermi National Accelerator Laboratory , Batavia, IL 60510, USAInter-University Centre for Astronomy and Astrophysics , Post Bag 4, Ganeshkhind, Pune 411 007, India; Kavli Institute for the Physics and Mathematics of the Universe (WPI) , 5-1-5, Kashiwanoha, 277-8583, JapanInter-University Centre for Astronomy and Astrophysics , Post Bag 4, Ganeshkhind, Pune 411 007, IndiaKavli Institute for Particle Astrophysics & Cosmology, P.O. Box 2450, Stanford University , Stanford, CA 94305, USA; Carnegie Observatories , 813 Santa Barbara Street, Pasadena, CA 91101, USA; Department of Physics & Astronomy, University of Southern California , Los Angeles, CA 90007, USA; Department of Physics, Stanford University , 382 Via Pueblo Mall, Stanford, CA 94305, USADepartment of Physics, Presidency University , 86/1 College Street, Kolkata 700073, IndiaThe abundance, distribution, and inner structure of satellites of galaxy clusters can be sensitive probes of the properties of dark matter. We run 30 cosmological zoom-in simulations with self-interacting dark matter (SIDM), with a velocity-dependent cross section, to study the properties of subhalos within cluster-mass hosts. We find that the abundance of subhalos that survive in the SIDM simulations are suppressed relative to their cold dark matter (CDM) counterparts. Once the population of disrupted subhalos—which may host orphan galaxies—is taken into account, satellite galaxy populations in CDM and SIDM models can be reconciled. However, even in this case, the inner structures of subhalos are significantly different in the two dark matter models. We study the feasibility of using the weak-lensing signal from the subhalo density profiles to distinguish between the cold and self-interacting dark matter while accounting for the potential contribution of orphan galaxies. We find that the effects of self-interactions on the density profile of subhalos can appear degenerate with subhalo disruption in CDM, when orphans are accounted for. With current error bars from the Subaru Hyper Suprime-Cam Strategic Program, we find that subhalos in the outskirts of clusters (where disruption is less prevalent) can be used to constrain dark matter physics. In the future, the Vera C. Rubin Observatory Legacy Survey of Space and Time will give precise measurements of the weak-lensing profile and can be used to constrain σ _T / m at the ∼1 cm ^2 g ^−1 level at v ∼ 2000 km s ^−1 .https://doi.org/10.3847/1538-4357/ac68e9Dark matterGalaxy clustersWeak gravitational lensingGalaxy dark matter halos |
| spellingShingle | Joy Bhattacharyya Susmita Adhikari Arka Banerjee Surhud More Amit Kumar Ethan O. Nadler Suchetana Chatterjee The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster Substructure The Astrophysical Journal Dark matter Galaxy clusters Weak gravitational lensing Galaxy dark matter halos |
| title | The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster Substructure |
| title_full | The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster Substructure |
| title_fullStr | The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster Substructure |
| title_full_unstemmed | The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster Substructure |
| title_short | The Signatures of Self-interacting Dark Matter and Subhalo Disruption on Cluster Substructure |
| title_sort | signatures of self interacting dark matter and subhalo disruption on cluster substructure |
| topic | Dark matter Galaxy clusters Weak gravitational lensing Galaxy dark matter halos |
| url | https://doi.org/10.3847/1538-4357/ac68e9 |
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