Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase
Moderate-resolution spectra ( R ≈ 2700) of the classical nova V1391 Cas were obtained in the near-infrared wavelength range of 0.95–2.45 μ m on UT 2020 August 14.41 using the Keck II telescope and the NIRES spectrograph. The spectral analysis revealed simultaneous detection of CO and CN molecular fe...
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IOP Publishing
2024-01-01
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| Online Access: | https://doi.org/10.3847/1538-3881/ad79f3 |
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| author | Hideyo Kawakita James E. Lyke |
| author_facet | Hideyo Kawakita James E. Lyke |
| author_sort | Hideyo Kawakita |
| collection | DOAJ |
| description | Moderate-resolution spectra ( R ≈ 2700) of the classical nova V1391 Cas were obtained in the near-infrared wavelength range of 0.95–2.45 μ m on UT 2020 August 14.41 using the Keck II telescope and the NIRES spectrograph. The spectral analysis revealed simultaneous detection of CO and CN molecular features. The CN red-system band was observed solely in absorption, while the CO first overtone bands, encompassing both ^12 CO and ^13 CO, displayed a combination of emission and absorption features at different velocities, resembling a P-Cygni profile. This specific CO profile is unprecedented in classical novae observations. Additionally, the negative velocity shifts in the absorption bands of both CN and CO were found to be consistent with each other. |
| format | Article |
| id | doaj-art-f52d6d8ff528454dabd61db5dfb8073c |
| institution | Kabale University |
| issn | 1538-3881 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | IOP Publishing |
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| series | The Astronomical Journal |
| spelling | doaj-art-f52d6d8ff528454dabd61db5dfb8073c2024-11-26T14:18:56ZengIOP PublishingThe Astronomical Journal1538-38812024-01-01168626610.3847/1538-3881/ad79f3Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum PhaseHideyo Kawakita0https://orcid.org/0000-0003-2011-9159James E. Lyke1https://orcid.org/0000-0001-7809-7867Koyama Astronomical Observatory, Kyoto Sangyo University , Motoyama, Kamigamo, Kita, 603-8555 Kyoto, JapanW. M. Keck Observatory , 65-1120 Mamalahoa Highway Kamuela, HI 96743, USAModerate-resolution spectra ( R ≈ 2700) of the classical nova V1391 Cas were obtained in the near-infrared wavelength range of 0.95–2.45 μ m on UT 2020 August 14.41 using the Keck II telescope and the NIRES spectrograph. The spectral analysis revealed simultaneous detection of CO and CN molecular features. The CN red-system band was observed solely in absorption, while the CO first overtone bands, encompassing both ^12 CO and ^13 CO, displayed a combination of emission and absorption features at different velocities, resembling a P-Cygni profile. This specific CO profile is unprecedented in classical novae observations. Additionally, the negative velocity shifts in the absorption bands of both CN and CO were found to be consistent with each other.https://doi.org/10.3847/1538-3881/ad79f3Classical novae |
| spellingShingle | Hideyo Kawakita James E. Lyke Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase The Astronomical Journal Classical novae |
| title | Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase |
| title_full | Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase |
| title_fullStr | Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase |
| title_full_unstemmed | Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase |
| title_short | Formation of CN and CO Molecules in the Envelope of Nova V1391 Cas During the Near-maximum Phase |
| title_sort | formation of cn and co molecules in the envelope of nova v1391 cas during the near maximum phase |
| topic | Classical novae |
| url | https://doi.org/10.3847/1538-3881/ad79f3 |
| work_keys_str_mv | AT hideyokawakita formationofcnandcomoleculesintheenvelopeofnovav1391casduringthenearmaximumphase AT jameselyke formationofcnandcomoleculesintheenvelopeofnovav1391casduringthenearmaximumphase |