Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14il
We present long-term photometric and spectroscopic studies of circumstellar material (CSM)–ejecta interacting supernova (SN) ASASSN-14il in the galaxy PGC 3093694. The SN reaches a peak r -band magnitude of ∼−20.3 ± 0.2 mag, rivaling SN 2006tf and SN 2010jl. The multiband and the pseudo-bolometric l...
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2024-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/ad7e11 |
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| author | Naveen Dukiya Anjasha Gangopadhyay Kuntal Misra Griffin Hosseinzadeh K. Azalee Bostroem Bhavya Ailawadhi D. Andrew Howell Stefano Valenti Iair Arcavi Curtis McCully Archana Gupta |
| author_facet | Naveen Dukiya Anjasha Gangopadhyay Kuntal Misra Griffin Hosseinzadeh K. Azalee Bostroem Bhavya Ailawadhi D. Andrew Howell Stefano Valenti Iair Arcavi Curtis McCully Archana Gupta |
| author_sort | Naveen Dukiya |
| collection | DOAJ |
| description | We present long-term photometric and spectroscopic studies of circumstellar material (CSM)–ejecta interacting supernova (SN) ASASSN-14il in the galaxy PGC 3093694. The SN reaches a peak r -band magnitude of ∼−20.3 ± 0.2 mag, rivaling SN 2006tf and SN 2010jl. The multiband and the pseudo-bolometric lightcurves show a plateau lasting ∼50 days. Semi-analytical CSM interaction models can match the high luminosity and decline rates of the lightcurves but fail to faithfully represent the plateau region and the bumps in the lightcurves. The spectral evolution resembles a typical Type IIn SN dominated by CSM interaction, showing blue continuum and narrow Balmer lines. The lines are dominated by electron scattering at early epochs. The signatures of the underlying ejecta are visible as the broad component in the H α profile from as early as day 50, hinting at asymmetry in the CSM. A narrow component is persistent throughout the evolution. The SN shows remarkable photometric and spectroscopic similarity with SN 2015da. However, the different polarization in ASASSN-14il compared to SN 2015da suggests an alternative viewing angle. The late-time blueshift in the H α profile supports dust formation in the post-shock CSM or ejecta. The mass-loss rate of 2–7 M _⊙ yr ^−1 suggests a luminous blue variable progenitor in an eruptive phase for ASASSN-14il. |
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| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-f30a72ef14c6462e85b3cc8e6ef757fa2024-11-14T16:23:26ZengIOP PublishingThe Astrophysical Journal1538-43572024-01-0197618610.3847/1538-4357/ad7e11Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14ilNaveen Dukiya0https://orcid.org/0000-0002-0394-6745Anjasha Gangopadhyay1https://orcid.org/0000-0002-3884-5637Kuntal Misra2https://orcid.org/0000-0003-1637-267XGriffin Hosseinzadeh3https://orcid.org/0000-0002-0832-2974K. Azalee Bostroem4https://orcid.org/0000-0002-4924-444XBhavya Ailawadhi5https://orcid.org/0009-0000-1020-9711D. Andrew Howell6https://orcid.org/0000-0003-4253-656XStefano Valenti7https://orcid.org/0000-0001-8818-0795Iair Arcavi8https://orcid.org/0000-0001-7090-4898Curtis McCully9https://orcid.org/0000-0001-5807-7893Archana Gupta10Aryabhatta Research Institute of Observational Sciences , Manora Peak 263001, India ; ndookia@gmail.com; Department of Applied Physics, Mahatma Jyotiba Phule Rohilkhand University , Bareilly 243006, IndiaOskar Klein Centre, Department of Astronomy, Stockholm University , AlbaNova, SE-106 91 Stockholm, Sweden; Hiroshima Astrophysical Science Centre, Hiroshima University , 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, JapanAryabhatta Research Institute of Observational Sciences , Manora Peak 263001, India ; ndookia@gmail.comSteward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USASteward Observatory, University of Arizona , 933 North Cherry Avenue, Tucson, AZ 85721-0065, USAAryabhatta Research Institute of Observational Sciences , Manora Peak 263001, India ; ndookia@gmail.com; Department of Physics, Deen Dayal Upadhyaya Gorakhpur University , Gorakhpur 273009, IndiaLas Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USADepartment of Physics and Astronomy, University of California , Davis, 1 Shields Avenue, Davis, CA 95616-5270, USASchool of Physics and Astronomy, Tel Aviv University , Tel Aviv 69978, IsraelLas Cumbres Observatory , 6740 Cortona Drive, Suite 102, Goleta, CA 93117-5575, USA; Department of Physics, University of California , Santa Barbara, CA 93106-9530, USADepartment of Applied Physics, Mahatma Jyotiba Phule Rohilkhand University , Bareilly 243006, IndiaWe present long-term photometric and spectroscopic studies of circumstellar material (CSM)–ejecta interacting supernova (SN) ASASSN-14il in the galaxy PGC 3093694. The SN reaches a peak r -band magnitude of ∼−20.3 ± 0.2 mag, rivaling SN 2006tf and SN 2010jl. The multiband and the pseudo-bolometric lightcurves show a plateau lasting ∼50 days. Semi-analytical CSM interaction models can match the high luminosity and decline rates of the lightcurves but fail to faithfully represent the plateau region and the bumps in the lightcurves. The spectral evolution resembles a typical Type IIn SN dominated by CSM interaction, showing blue continuum and narrow Balmer lines. The lines are dominated by electron scattering at early epochs. The signatures of the underlying ejecta are visible as the broad component in the H α profile from as early as day 50, hinting at asymmetry in the CSM. A narrow component is persistent throughout the evolution. The SN shows remarkable photometric and spectroscopic similarity with SN 2015da. However, the different polarization in ASASSN-14il compared to SN 2015da suggests an alternative viewing angle. The late-time blueshift in the H α profile supports dust formation in the post-shock CSM or ejecta. The mass-loss rate of 2–7 M _⊙ yr ^−1 suggests a luminous blue variable progenitor in an eruptive phase for ASASSN-14il.https://doi.org/10.3847/1538-4357/ad7e11Type II supernovaePhotometrySpectroscopyCore-collapse supernovaeLuminous blue variable starsDust formation |
| spellingShingle | Naveen Dukiya Anjasha Gangopadhyay Kuntal Misra Griffin Hosseinzadeh K. Azalee Bostroem Bhavya Ailawadhi D. Andrew Howell Stefano Valenti Iair Arcavi Curtis McCully Archana Gupta Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14il The Astrophysical Journal Type II supernovae Photometry Spectroscopy Core-collapse supernovae Luminous blue variable stars Dust formation |
| title | Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14il |
| title_full | Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14il |
| title_fullStr | Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14il |
| title_full_unstemmed | Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14il |
| title_short | Probing the Circumstellar Environment of the Highly Luminous Type IIn Supernova ASASSN-14il |
| title_sort | probing the circumstellar environment of the highly luminous type iin supernova asassn 14il |
| topic | Type II supernovae Photometry Spectroscopy Core-collapse supernovae Luminous blue variable stars Dust formation |
| url | https://doi.org/10.3847/1538-4357/ad7e11 |
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