JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse Shock
We present initial results from JWST NIRSpec integral field unit observations of the nearby supernova SN 1987A. The observations provide the first spatially resolved spectroscopy of the ejecta and equatorial ring (ER) over the 1–5 μ m range. We construct 3D emissivity maps of the [Fe i ] 1.443 μ m l...
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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 Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/acd555 |
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| author | J. Larsson C. Fransson B. Sargent O. C. Jones M. J. Barlow P. Bouchet M. Meixner J. A. D. L. Blommaert A. Coulais O. D. Fox R. Gastaud A. Glasse N. Habel A. S. Hirschauer J. Hjorth J. Jaspers P. J. Kavanagh O. Krause R. M. Lau L. Lenkić O. Nayak A. Rest T. Temim T. Tikkanen R. Wesson G. S. Wright |
| author_facet | J. Larsson C. Fransson B. Sargent O. C. Jones M. J. Barlow P. Bouchet M. Meixner J. A. D. L. Blommaert A. Coulais O. D. Fox R. Gastaud A. Glasse N. Habel A. S. Hirschauer J. Hjorth J. Jaspers P. J. Kavanagh O. Krause R. M. Lau L. Lenkić O. Nayak A. Rest T. Temim T. Tikkanen R. Wesson G. S. Wright |
| author_sort | J. Larsson |
| collection | DOAJ |
| description | We present initial results from JWST NIRSpec integral field unit observations of the nearby supernova SN 1987A. The observations provide the first spatially resolved spectroscopy of the ejecta and equatorial ring (ER) over the 1–5 μ m range. We construct 3D emissivity maps of the [Fe i ] 1.443 μ m line from the inner ejecta and the He i 1.083 μ m line from the reverse shock (RS), where the former probes the explosion geometry and the latter traces the structure of the circumstellar medium. We also present a model for the integrated spectrum of the ejecta. The [Fe i ] 3D map reveals a highly asymmetric morphology resembling a broken dipole, dominated by two large clumps with velocities of ∼2300 km s ^−1 . We also find evidence that the Fe-rich inner ejecta have started to interact with the RS. The RS surface traced by the He i line extends from just inside the ER to higher latitudes on both sides of the ER with a half-opening angle ∼45°, forming a bubble-like structure. The spectral model for the ejecta allows us to identify the many emission lines, including numerous H _2 lines. We find that the H _2 is most likely excited by far-UV emission, while the metal-line ratios are consistent with a combination of collisional excitation and recombination in the low-temperature ejecta. We also find several high-ionization coronal lines from the ER, requiring a temperature ≳2 × 10 ^6 K. |
| first_indexed | 2024-03-12T04:17:52Z |
| format | Article |
| id | doaj.art-4c718bd7bd004042b3c8166ca3ee0cce |
| institution | Directory Open Access Journal |
| issn | 2041-8205 |
| language | English |
| last_indexed | 2024-03-12T04:17:52Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal Letters |
| spelling | doaj.art-4c718bd7bd004042b3c8166ca3ee0cce2023-09-03T10:34:51ZengIOP PublishingThe Astrophysical Journal Letters2041-82052023-01-019492L2710.3847/2041-8213/acd555JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse ShockJ. Larsson0https://orcid.org/0000-0003-0065-2933C. Fransson1https://orcid.org/0000-0001-8532-3594B. Sargent2https://orcid.org/0000-0001-9855-8261O. C. Jones3https://orcid.org/0000-0003-4870-5547M. J. Barlow4https://orcid.org/0000-0002-3875-1171P. Bouchet5https://orcid.org/0000-0002-6018-3393M. Meixner6https://orcid.org/0000-0002-0522-3743J. A. D. L. Blommaert7https://orcid.org/0000-0002-5797-2439A. Coulais8https://orcid.org/0000-0001-6492-7719O. D. Fox9https://orcid.org/0000-0003-2238-1572R. Gastaud10A. Glasse11https://orcid.org/0000-0002-2041-2462N. Habel12https://orcid.org/0000-0002-2667-1676A. S. Hirschauer13https://orcid.org/0000-0002-2954-8622J. Hjorth14https://orcid.org/0000-0002-4571-2306J. Jaspers15P. J. Kavanagh16https://orcid.org/0000-0001-6872-2358O. Krause17R. M. Lau18https://orcid.org/0000-0003-0778-0321L. Lenkić19https://orcid.org/0000-0003-4023-8657O. Nayak20https://orcid.org/0000-0001-6576-6339A. Rest21https://orcid.org/0000-0002-4410-5387T. Temim22https://orcid.org/0000-0001-7380-3144T. Tikkanen23R. Wesson24https://orcid.org/0000-0002-4000-4394G. S. Wright25Department of Physics, KTH Royal Institute of Technology, The Oskar Klein Centre , AlbaNova, SE-106 91 Stockholm, Sweden ; josla@kth.seDepartment of Astronomy, Stockholm University , The Oskar Klein Centre, AlbaNova, SE-106 91 Stockholm, SwedenSpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; Center for Astrophysical Sciences, The William H. Miller III Department of Physics and Astronomy, Johns Hopkins University , Baltimore, MD 21218, USAUK Astronomy Technology Centre, Royal Observatory , Blackford Hill, Edinburgh EH9 3HJ, UKDepartment of Physics and Astronomy, University College London (UCL) , Gower Street, London WC1E 6BT, UKLaboratoire AIM Paris-Saclay, CNRS, Universite Paris Diderot , F-91191 Gif-sur-Yvette, FranceStratospheric Observatory for Infrared Astronomy , NASA Ames Research Center, Mail Stop 204-14, Moffett Field, CA 94035, USA; Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USAAstronomy and Astrophysics Research Group , Department of Physics and Astrophysics, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, BelgiumLERMA, Observatoire de Paris, Université PSL, Sorbonne Universié , CNRS, Paris, France; Astrophysics Department CEA-Saclay, FranceSpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USALaboratoire AIM Paris-Saclay, CEA-IRFU/SAp, CNRS, Universite Paris Diderot , F-91191 Gif-sur-Yvette, FranceUK Astronomy Technology Centre, Royal Observatory , Blackford Hill, Edinburgh EH9 3HJ, UKStratospheric Observatory for Infrared Astronomy , NASA Ames Research Center, Mail Stop 204-14, Moffett Field, CA 94035, USA; Jet Propulsion Laboratory, California Institute of Technology , 4800 Oak Grove Drive, Pasadena, CA 91109, USASpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USADARK, Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2200 Copenhagen, DenmarkDublin Institute for Advanced Studies , School of Cosmic Physics, Astronomy & Astrophysics Section, 31 Fitzwilliam Place, Dublin 2, Ireland; Department of Experimental Physics, Maynooth University , Maynooth, Co Kildare, IrelandDublin Institute for Advanced Studies , School of Cosmic Physics, Astronomy & Astrophysics Section, 31 Fitzwilliam Place, Dublin 2, Ireland; Department of Experimental Physics, Maynooth University , Maynooth, Co Kildare, IrelandMax-Planck-Institut fuer Astronomie , Koenigstuhl 17, D-69117 Heidelberg, GermanyNSF's NOIR Lab 950 N. Cherry Avenue, Tucson, AZ 85721, USAStratospheric Observatory for Infrared Astronomy , NASA Ames Research Center, Mail Stop 204-14, Moffett Field, CA 94035, USASpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USASpace Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; Department of Physics and Astronomy, Johns Hopkins University , 3400 North Charles Street, Baltimore, MD 21218, USADepartment of Astrophysical Sciences, Princeton University , Princeton, NJ 08544, USASchool of Physics & Astronomy, Space Research Centre, University of Leicester , Space Park Leicester, 92 Corporation Road, Leicester LE4 5SP, UKSchool of Physics and Astronomy, Cardiff University , Queen's Buildings, The Parade, Cardiff CF24 3AA, UKUK Astronomy Technology Centre, Royal Observatory , Blackford Hill, Edinburgh EH9 3HJ, UKWe present initial results from JWST NIRSpec integral field unit observations of the nearby supernova SN 1987A. The observations provide the first spatially resolved spectroscopy of the ejecta and equatorial ring (ER) over the 1–5 μ m range. We construct 3D emissivity maps of the [Fe i ] 1.443 μ m line from the inner ejecta and the He i 1.083 μ m line from the reverse shock (RS), where the former probes the explosion geometry and the latter traces the structure of the circumstellar medium. We also present a model for the integrated spectrum of the ejecta. The [Fe i ] 3D map reveals a highly asymmetric morphology resembling a broken dipole, dominated by two large clumps with velocities of ∼2300 km s ^−1 . We also find evidence that the Fe-rich inner ejecta have started to interact with the RS. The RS surface traced by the He i line extends from just inside the ER to higher latitudes on both sides of the ER with a half-opening angle ∼45°, forming a bubble-like structure. The spectral model for the ejecta allows us to identify the many emission lines, including numerous H _2 lines. We find that the H _2 is most likely excited by far-UV emission, while the metal-line ratios are consistent with a combination of collisional excitation and recombination in the low-temperature ejecta. We also find several high-ionization coronal lines from the ER, requiring a temperature ≳2 × 10 ^6 K.https://doi.org/10.3847/2041-8213/acd555Supernova remnantsCore-collapse supernovae |
| spellingShingle | J. Larsson C. Fransson B. Sargent O. C. Jones M. J. Barlow P. Bouchet M. Meixner J. A. D. L. Blommaert A. Coulais O. D. Fox R. Gastaud A. Glasse N. Habel A. S. Hirschauer J. Hjorth J. Jaspers P. J. Kavanagh O. Krause R. M. Lau L. Lenkić O. Nayak A. Rest T. Temim T. Tikkanen R. Wesson G. S. Wright JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse Shock The Astrophysical Journal Letters Supernova remnants Core-collapse supernovae |
| title | JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse Shock |
| title_full | JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse Shock |
| title_fullStr | JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse Shock |
| title_full_unstemmed | JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse Shock |
| title_short | JWST NIRSpec Observations of Supernova 1987A—From the Inner Ejecta to the Reverse Shock |
| title_sort | jwst nirspec observations of supernova 1987a from the inner ejecta to the reverse shock |
| topic | Supernova remnants Core-collapse supernovae |
| url | https://doi.org/10.3847/2041-8213/acd555 |
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