Radio Observations of Six Young Type Ia Supernovae
Type Ia supernovae (SNe Ia) are important cosmological tools, probes of binary star evolution, and contributors to cosmic metal enrichment; yet, a definitive understanding of the binary star systems that produce them remains elusive. Of particular interest is the identity of the mass-donor companion...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acd84f |
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| author | C. E. Harris Sumit K. Sarbadhicary L. Chomiuk Anthony L. Piro D. J. Sand S. Valenti |
| author_facet | C. E. Harris Sumit K. Sarbadhicary L. Chomiuk Anthony L. Piro D. J. Sand S. Valenti |
| author_sort | C. E. Harris |
| collection | DOAJ |
| description | Type Ia supernovae (SNe Ia) are important cosmological tools, probes of binary star evolution, and contributors to cosmic metal enrichment; yet, a definitive understanding of the binary star systems that produce them remains elusive. Of particular interest is the identity of the mass-donor companion to the exploding carbon–oxygen white dwarf (CO WD). In this work, we present early-time (first observation within 10 days post-explosion) radio observations of six nearby (within 40 Mpc) SNe Ia taken by the Jansky Very Large Array, which are used to constrain the presence of synchrotron emission from the interaction between ejecta and circumstellar material (CSM). The two motivations for these early-time observations are: (1) to constrain the presence of low-density winds and (2) to provide an additional avenue of investigation for those SNe Ia observed to have early-time optical/UV excesses that may be due to CSM interaction. We detect no radio emission from any of our targets. Toward our first aim, these non-detections further increase the sample of SNe Ia that rule out winds from symbiotic binaries and strongly accreting white dwarfs. and discuss the dependence on underlying model assumptions and how our observations represent a large increase in the sample of SNe Ia with low-density wind constraints. For the second aim, we present a radiation hydrodynamics simulation to explore radio emission from an SN Ia interacting with a compact shell of CSM, and find that relativistic electrons cannot survive to produce radio emission despite the rapid expansion of the shocked shell after shock breakout. The effects of model assumptions are discussed for both the wind and compact shell conclusions. |
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| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T02:59:23Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-af2a22cba5494171b1368170e5638c792023-09-03T14:54:06ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0195212410.3847/1538-4357/acd84fRadio Observations of Six Young Type Ia SupernovaeC. E. Harris0https://orcid.org/0000-0002-1751-7474Sumit K. Sarbadhicary1https://orcid.org/0000-0002-4781-7291L. Chomiuk2https://orcid.org/0000-0002-8400-3705Anthony L. Piro3https://orcid.org/0000-0001-6806-0673D. J. Sand4https://orcid.org/0000-0003-4102-380XS. Valenti5https://orcid.org/0000-0001-8818-0795Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824, USA ; harr1561@msu.eduDepartment of Physics and Astronomy, Michigan State University , East Lansing, MI 48824, USA ; harr1561@msu.edu; Department of Astronomy, The Ohio State University , 140 West 18th Avenue, Columbus, OH 43210, USA; Center for Cosmology and Astroparticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USACenter for Data Intensive and Time Domain Astronomy, Department of Physics and Astronomy, Michigan State University , East Lansing, MI 48824, USAThe Observatories of the Carnegie Institution for Science , 813 Santa Barbara Street, Pasadena, CA 91101, USADepartment of Astronomy/Steward Observatory , 933 North Cherry Avenue, Room N204, Tucson, AZ 85721-0065, USADepartment of Physics, University of California , 1 Shields Avenue, Davis, CA 95616-5270, USAType Ia supernovae (SNe Ia) are important cosmological tools, probes of binary star evolution, and contributors to cosmic metal enrichment; yet, a definitive understanding of the binary star systems that produce them remains elusive. Of particular interest is the identity of the mass-donor companion to the exploding carbon–oxygen white dwarf (CO WD). In this work, we present early-time (first observation within 10 days post-explosion) radio observations of six nearby (within 40 Mpc) SNe Ia taken by the Jansky Very Large Array, which are used to constrain the presence of synchrotron emission from the interaction between ejecta and circumstellar material (CSM). The two motivations for these early-time observations are: (1) to constrain the presence of low-density winds and (2) to provide an additional avenue of investigation for those SNe Ia observed to have early-time optical/UV excesses that may be due to CSM interaction. We detect no radio emission from any of our targets. Toward our first aim, these non-detections further increase the sample of SNe Ia that rule out winds from symbiotic binaries and strongly accreting white dwarfs. and discuss the dependence on underlying model assumptions and how our observations represent a large increase in the sample of SNe Ia with low-density wind constraints. For the second aim, we present a radiation hydrodynamics simulation to explore radio emission from an SN Ia interacting with a compact shell of CSM, and find that relativistic electrons cannot survive to produce radio emission despite the rapid expansion of the shocked shell after shock breakout. The effects of model assumptions are discussed for both the wind and compact shell conclusions.https://doi.org/10.3847/1538-4357/acd84fSupernovaeCircumstellar gasShocksRadiative transfer simulations |
| spellingShingle | C. E. Harris Sumit K. Sarbadhicary L. Chomiuk Anthony L. Piro D. J. Sand S. Valenti Radio Observations of Six Young Type Ia Supernovae The Astrophysical Journal Supernovae Circumstellar gas Shocks Radiative transfer simulations |
| title | Radio Observations of Six Young Type Ia Supernovae |
| title_full | Radio Observations of Six Young Type Ia Supernovae |
| title_fullStr | Radio Observations of Six Young Type Ia Supernovae |
| title_full_unstemmed | Radio Observations of Six Young Type Ia Supernovae |
| title_short | Radio Observations of Six Young Type Ia Supernovae |
| title_sort | radio observations of six young type ia supernovae |
| topic | Supernovae Circumstellar gas Shocks Radiative transfer simulations |
| url | https://doi.org/10.3847/1538-4357/acd84f |
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