دورية أكاديمية
Powerful Yet Lonely: Is 3C 297 a High-redshift Fossil Group?
| العنوان: | Powerful Yet Lonely: Is 3C 297 a High-redshift Fossil Group? |
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| المؤلفون: | Valentina Missaglia, Juan P. Madrid, Mischa Schirmer, Francesco Massaro, Alberto Rodríguez-Ardila, Carlos J. Donzelli, Martell Valencia, Alessandro Paggi, Ralph P. Kraft, Chiara Stuardi, Belinda J. Wilkes |
| المصدر: | The Astrophysical Journal Supplement Series, Vol 264, Iss 1, p 6 (2022) |
| بيانات النشر: | IOP Publishing, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Astrophysics |
| مصطلحات موضوعية: | Active galactic nuclei, Brightest cluster galaxies, Galaxy clusters, Intracluster medium, Astrophysics, QB460-466 |
| الوصف: | The environment of the high-redshift ( z = 1.408), powerful radio-loud galaxy 3C 297 has several distinctive features of a galaxy cluster. Among them, a characteristic halo of hot gas revealed by Chandra X-ray observations. In addition, a radio map obtained with the Very Large Array shows a bright hotspot in the northwestern direction, created by the interaction of the active galactic nucleus (AGN) jet arising from 3C 297 with its environment. In the X-ray images, emission cospatial with the northwestern radio lobe is detected, and peaks at the position of the radio hotspot. The extended, complex X-ray emission observed with our new Chandra data is largely unrelated to its radio structure. Despite having attributes of a galaxy cluster, no companion galaxies have been identified from 39 new spectra of neighboring targets of 3C 297 obtained with the Gemini Multi-Object Spectrograph. None of the 19 galaxies for which a redshift was determined lies at the same distance as 3C 297. The optical spectral analysis of the new Gemini spectrum of 3C 297 reveals an isolated Type II radio-loud AGN. We also detected line broadening in [O ii ] λ 3728 with a FWHM about 1700 km s ^−1 and possible line shifts of up to 500–600 km s ^−1 . We postulate that the host galaxy of 3C 297 is a fossil group, in which most of the stellar mass has merged into a single object, leaving behind an X-ray halo. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1538-4365 0067-0049 |
| العلاقة: | https://doaj.org/toc/0067-0049Test |
| DOI: | 10.3847/1538-4365/ac9f3e |
| الوصول الحر: | https://doaj.org/article/9f8f0f42781a450e809d453890b05f52Test |
| رقم الانضمام: | edsdoj.9f8f0f42781a450e809d453890b05f52 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 15384365 00670049 |
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| DOI: | 10.3847/1538-4365/ac9f3e |