Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl
We present ultraviolet (UV) through near-infrared (NIR) photometric and spectroscopic observations of the nearby SN 2024pxl, the third Type Ia supernova (SN Ia) in NGC 6384. SN 2024pxl is a Type Iax supernova (SN Iax) with an intermediate luminosity ( M _r = −16.99 ± 0.32 mag) and an average SN Iax...
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2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/ade787 |
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| author | W. B. Hoogendam C. Ashall D. O. Jones B. J. Shappee M. A. Tucker M. E. Huber K. Auchettl D. D. Desai A. Do J. T. Hinkle M. Y. Kong S. Romagnoli J. Shi A. Syncatto C. D. Kilpatrick |
| author_facet | W. B. Hoogendam C. Ashall D. O. Jones B. J. Shappee M. A. Tucker M. E. Huber K. Auchettl D. D. Desai A. Do J. T. Hinkle M. Y. Kong S. Romagnoli J. Shi A. Syncatto C. D. Kilpatrick |
| author_sort | W. B. Hoogendam |
| collection | DOAJ |
| description | We present ultraviolet (UV) through near-infrared (NIR) photometric and spectroscopic observations of the nearby SN 2024pxl, the third Type Ia supernova (SN Ia) in NGC 6384. SN 2024pxl is a Type Iax supernova (SN Iax) with an intermediate luminosity ( M _r = −16.99 ± 0.32 mag) and an average SN Iax light curve decline rate. SN 2024pxl was discovered ∼3 days after first light, and the rising light curve follows a single power law that is inconsistent with significant interaction with a companion star or circumstellar material. Our extensive NIR photometric coverage is comparable to that of the well-observed SNe Iax 2005hk and 2012Z, and we demonstrate that the J − H colors of SNe Iax differ from normal SNe Ia and appear to be more homogeneous as a class. Spectroscopically, we report the earliest-ever NIR spectrum of an SN Iax as measured from maximum light ( t ≈ −9 days): a featureless continuum with similarities to a ∼9000 K blackbody, and the line velocities are consistent with a mixed-ejecta structure, with C, Si, and Fe having similar velocities and velocity evolutions. We find a tentative correlation between the H -band break Co ii velocity ∼20 days post-peak and absolute magnitude, with more luminous SNe Iax showing faster Co ii velocities. Our observations suggest that SN 2024pxl resulted from the thermonuclear disruption of a CO white dwarf star that undergoes deflagration burning. |
| format | Article |
| id | doaj-art-af11e4a3fbbb42bf8de0a32778669887 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-af11e4a3fbbb42bf8de0a327786698872025-08-20T03:35:32ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01988220910.3847/1538-4357/ade787Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxlW. B. Hoogendam0https://orcid.org/0000-0003-3953-9532C. Ashall1https://orcid.org/0000-0002-5221-7557D. O. Jones2https://orcid.org/0000-0002-6230-0151B. J. Shappee3https://orcid.org/0000-0003-4631-1149M. A. Tucker4https://orcid.org/0000-0002-2471-8442M. E. Huber5https://orcid.org/0000-0003-1059-9603K. Auchettl6https://orcid.org/0000-0002-4449-9152D. D. Desai7https://orcid.org/0000-0002-2164-859XA. Do8https://orcid.org/0000-0003-3429-7845J. T. Hinkle9https://orcid.org/0000-0001-9668-2920M. Y. Kong10https://orcid.org/0009-0005-5121-2884S. Romagnoli11https://orcid.org/0009-0003-8153-9576J. Shi12https://orcid.org/0009-0008-3724-1824A. Syncatto13https://orcid.org/0009-0000-6821-9285C. D. Kilpatrick14https://orcid.org/0000-0002-5740-7747Institute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA ; willemh@hawaii.eduInstitute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA ; willemh@hawaii.eduInstitute for Astronomy, University of Hawai’i , 640 N. A’ohoku Pl., Hilo, HI 96720, USAInstitute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA ; willemh@hawaii.eduCenter for Cosmology and Astroparticle Physics, The Ohio State University , Columbus, OH, USA; Department of Astronomy, The Ohio State University , Columbus, OH, USAInstitute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA ; willemh@hawaii.eduSchool of Physics, The University of Melbourne , Parkville, VIC, Australia; Department of Astronomy and Astrophysics, University of California , Santa Cruz, CA, USAInstitute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA ; willemh@hawaii.eduInstitute of Astronomy , Cambridge, UK; Kavli Institute for Cosmology , Cambridge, UKInstitute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA ; willemh@hawaii.eduInstitute for Astronomy, University of Hawai’i at Manoa , 2680 Woodlawn Dr., Hawai’i, HI 96822, USA ; willemh@hawaii.eduSchool of Physics, The University of Melbourne , Parkville, VIC, AustraliaSchool of Physics, The University of Melbourne , Parkville, VIC, AustraliaDepartment of Physics and Astronomy, University of Hawai‘i at Hilo , Hilo, HI, USACenter for Interdisciplinary Exploration and Research in Astrophysics, Northwestern University , Evanston, IL, USAWe present ultraviolet (UV) through near-infrared (NIR) photometric and spectroscopic observations of the nearby SN 2024pxl, the third Type Ia supernova (SN Ia) in NGC 6384. SN 2024pxl is a Type Iax supernova (SN Iax) with an intermediate luminosity ( M _r = −16.99 ± 0.32 mag) and an average SN Iax light curve decline rate. SN 2024pxl was discovered ∼3 days after first light, and the rising light curve follows a single power law that is inconsistent with significant interaction with a companion star or circumstellar material. Our extensive NIR photometric coverage is comparable to that of the well-observed SNe Iax 2005hk and 2012Z, and we demonstrate that the J − H colors of SNe Iax differ from normal SNe Ia and appear to be more homogeneous as a class. Spectroscopically, we report the earliest-ever NIR spectrum of an SN Iax as measured from maximum light ( t ≈ −9 days): a featureless continuum with similarities to a ∼9000 K blackbody, and the line velocities are consistent with a mixed-ejecta structure, with C, Si, and Fe having similar velocities and velocity evolutions. We find a tentative correlation between the H -band break Co ii velocity ∼20 days post-peak and absolute magnitude, with more luminous SNe Iax showing faster Co ii velocities. Our observations suggest that SN 2024pxl resulted from the thermonuclear disruption of a CO white dwarf star that undergoes deflagration burning.https://doi.org/10.3847/1538-4357/ade787Type Ia supernovaeNear infrared astronomy |
| spellingShingle | W. B. Hoogendam C. Ashall D. O. Jones B. J. Shappee M. A. Tucker M. E. Huber K. Auchettl D. D. Desai A. Do J. T. Hinkle M. Y. Kong S. Romagnoli J. Shi A. Syncatto C. D. Kilpatrick Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl The Astrophysical Journal Type Ia supernovae Near infrared astronomy |
| title | Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl |
| title_full | Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl |
| title_fullStr | Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl |
| title_full_unstemmed | Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl |
| title_short | Early and Extensive Ultraviolet through Near Infrared Observations of the Intermediate-luminosity Type Iax Supernovae 2024pxl |
| title_sort | early and extensive ultraviolet through near infrared observations of the intermediate luminosity type iax supernovae 2024pxl |
| topic | Type Ia supernovae Near infrared astronomy |
| url | https://doi.org/10.3847/1538-4357/ade787 |
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