التفاصيل البيبلوغرافية
| العنوان: |
Compact Symmetric Objects. III. Evolution of the High-luminosity Branch and a Possible Connection with Tidal Disruption Events |
| المؤلفون: |
Readhead, A. C. S, Ravi, V., Blandford, R. D., Sullivan, A. G., Somalwar, J., Begelman, M. C., Birkinshaw, M., Liodakis, I., Lister, M. L., Pearson, T. J., Taylor, G. B., Wilkinson, P. N., Globus, N., Kiehlmann, S., Lawrence, C. R., Murphy, D., O'Neill, S., Pavlidou, V., Sheldahl, E., Siemiginowska, A., Tassis, K. |
| المصدر: |
Astrophysical Journal, 961(2), 242, (2024-02-01) |
| بيانات النشر: |
American Astronomical Society |
| سنة النشر: |
2024 |
| المجموعة: |
Caltech Authors (California Institute of Technology) |
| مصطلحات موضوعية: |
Space and Planetary Science, Astronomy and Astrophysics |
| الوصف: |
We use a sample of 54 compact symmetric objects (CSOs) to confirm that there are two unrelated CSO classes: an edge-dimmed, low-luminosity class (CSO 1), and an edge-brightened, high-luminosity class (CSO 2). Using blind tests, we show that CSO 2s consist of three subclasses: CSO 2.0, having prominent hot spots at the leading edges of narrow jets and/or narrow lobes; CSO 2.2, without prominent hot spots and with broad jets and/or lobes; and CSO 2.1, which exhibit mixed properties. Most CSO 2s do not evolve into larger jetted active galactic nuclei (AGN), but spend their whole life cycle as CSOs of size ≲500 pc and age ≲5000 yr. The minimum energies needed to produce the radio luminosity and structure in CSO 2s range from ∼10−4M⊙c2to ∼7M⊙c2. We show that the transient nature of most CSO 2s, and their birth rate, can be explained through ignition in the tidal disruption events of stars. We also consider possibilities of tapping the spin energy of the supermassive black hole, and tapping the energy of the accretion disk. Our results demonstrate that CSOs constitute a large family of AGN in which we have thus far studied only the brightest. More comprehensive CSO studies, with higher sensitivity, resolution, and dynamic range, will revolutionize our understanding of AGN and the central engines that power them. ; © 2024. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of theCreative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. ; We thank Martin Rees for discussions that led to a significant improvement in our interpretation of these results. We thank Christopher O'Dea for providing the data on the large-scale structure of 0108+388. We thank the reviewer of this paper for many helpful suggestions that have clarified several important aspects of this work. This research has made use of data from the MOJAVE database ... |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
English |
| Relation: |
https://www.caltech.edu/about/news/sleeping-supermassive-black-holes-awakened-briefly-by-shredded-stars |
| DOI: |
10.3847/1538-4357/ad0c55 |
| الاتاحة: |
https://doi.org/10.3847/1538-4357/ad0c55 |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/legalcode |
| رقم الانضمام: |
edsbas.3FA8CA0D |
| قاعدة البيانات: |
BASE |