%0 Generic %1 larsson2023nirspec %A Larsson, J. %A Fransson, C. %A Sargent, B. %A Jones, O. C. %A Barlow, M. J. %A Bouchet, P. %A Meixner, M. %A Blommaert, J. A. D. L. %A Coulais, A. %A Fox, O. D. %A Gastaud, R. %A Glasse, A. %A Habel, N. %A Hirschauer, A. S. %A Hjorth, J. %A Jaspers, J. %A Kavanagh, P. J. %A Krause, O. %A Lau, R. M. %A Lenkic, L. %A Nayak, O. %A Rest, A. %A Temim, T. %A Tikkanen, T. %A Wesson, R. %A Wright, G. S. %D 2023 %K CanJPhys EarlyGalaxy JWST arXiv tutorial %T JWST NIRSpec observations of Supernova 1987A -- from the inner ejecta to the reverse shock %U http://arxiv.org/abs/2302.03576 %X 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 $\mu$m range. We construct 3D emissivity maps of the Fe I 1.443 $\mu$m line from the inner ejecta and the He I 1.083 $\mu$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. We also find evidence that the Fe-rich inner ejecta have started to interact with the RS in the south. 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 degrees, forming a bubble-like structure above and below the ER. The spectral model for the ejecta allows us to identify the many emission lines in this wavelength region, including numerous H$_2$ lines. We find that the H$_2$ is most likely excited by far-UV emission, while the metal lines ratios are consistent with recombination in very low temperature ejecta.

@misc{larsson2023nirspec, abstract = {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 $\mu$m range. We construct 3D emissivity maps of the [Fe I] 1.443 $\mu$m line from the inner ejecta and the He I 1.083 $\mu$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. We also find evidence that the Fe-rich inner ejecta have started to interact with the RS in the south. 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 degrees, forming a bubble-like structure above and below the ER. The spectral model for the ejecta allows us to identify the many emission lines in this wavelength region, including numerous H$_2$ lines. We find that the H$_2$ is most likely excited by far-UV emission, while the metal lines ratios are consistent with recombination in very low temperature ejecta.}, added-at = {2023-02-09T22:46:42.000+0100}, author = {Larsson, J. and Fransson, C. and Sargent, B. and Jones, O. C. and Barlow, M. J. and Bouchet, P. and Meixner, M. and Blommaert, J. A. D. L. and Coulais, A. and Fox, O. D. and Gastaud, R. and Glasse, A. and Habel, N. and Hirschauer, A. S. and Hjorth, J. and Jaspers, J. and Kavanagh, P. J. and Krause, O. and Lau, R. M. and Lenkic, L. and Nayak, O. and Rest, A. and Temim, T. and Tikkanen, T. and Wesson, R. and Wright, G. S.}, biburl = {https://www.bibsonomy.org/bibtex/29f3bba751fb6d422a497fba4b2f0662c/jsinclair_csp}, description = {JWST NIRSpec observations of Supernova 1987A -- from the inner ejecta to the reverse shock}, interhash = {fdbd4c16f50a4e7a030c352a3ad25106}, intrahash = {9f3bba751fb6d422a497fba4b2f0662c}, keywords = {CanJPhys EarlyGalaxy JWST arXiv tutorial}, note = {cite arxiv:2302.03576Comment: Submitted to AAS Journals}, timestamp = {2023-02-09T22:46:42.000+0100}, title = {JWST NIRSpec observations of Supernova 1987A -- from the inner ejecta to the reverse shock}, url = {http://arxiv.org/abs/2302.03576}, year = 2023 }