Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Double quasars"'
Autor:
Yoshiki Matsuoka, Takuma Izumi, Masafusa Onoue, Michael A. Strauss, Kazushi Iwasawa, Nobunari Kashikawa, Masayuki Akiyama, Kentaro Aoki, Junya Arita, Masatoshi Imanishi, Rikako Ishimoto, Toshihiro Kawaguchi, Kotaro Kohno, Chien-Hsiu Lee, Tohru Nagao, John D. Silverman, Yoshiki Toba
Publikováno v:
The Astrophysical Journal Letters, Vol 965, Iss 1, p L4 (2024)
We report the discovery of two quasars at a redshift of z = 6.05 in the process of merging. They were serendipitously discovered from the deep multiband imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey. The quasar
Externí odkaz:
https://doaj.org/article/213483deef95490b82e7f2c75e4f0c89
Autor:
Yan-Rong Li, Chen Hu, Zhu-Heng Yao, Yong-Jie Chen, Hua-Rui Bai, Sen Yang, Pu Du, Feng-Na Fang, Yi-Xin Fu, Jun-Rong Liu, Yue-Chang Peng, Yu-Yang Songsheng, Yi-Lin Wang, Ming Xiao, Shuo Zhai, Hartmut Winkler, Jin-Ming Bai, Luis C. Ho, Romain G. Petrov, Jesús Aceituno, Jian-Min Wang, SARM Collaboration
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 86 (2024)
We conduct a reverberation mapping (RM) campaign to spectroscopically monitor a sample of selected bright active galactic nuclei with large anticipated broad-line region (BLR) sizes adequate for spectroastrometric (SA) observations by the GRAVITY ins
Externí odkaz:
https://doaj.org/article/9f1d6d9e7eb24fabbc586db0ff6154b0
Autor:
Yu-Ching Chen, Yuzo Ishikawa, Nadia L. Zakamska, Xin Liu, Yue Shen, Hsiang-Chih Hwang, David Rupke, Andrey Vayner, Arran C. Gross, Weizhe Liu, Dominika Wylezalek, Sylvain Veilleux, Caroline Bertemes, Nadiia Diachenko, Swetha Sankar
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 92 (2024)
Dual quasars—two active supermassive black holes at galactic scales—represent crucial objects for studying the impact of galaxy mergers and quasar activity on the star formation rate (SFR) within their host galaxies, particularly at cosmic noon w
Externí odkaz:
https://doaj.org/article/1aea4d5e3ca24b99b638fe9570e5c61b
Autor:
Emma Schwartzman, Tracy E. Clarke, Kristina Nyland, Nathan J. Secrest, Ryan W. Pfeifle, Henrique Schmitt, Shobita Satyapal, Barry Rothberg
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 2, p 233 (2024)
Binary and dual active galactic nuclei (AGNs) are an important observational tool for studying the formation and dynamical evolution of galaxies and supermassive black holes. An entirely new method for identifying possible AGN pairs makes use of the
Externí odkaz:
https://doaj.org/article/57c62c7aa3664bfa9a7949e5998fc42f
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 19 (2024)
The galaxy CID-42 (CXOC J100043.1+020637.2) at z = 0.359 has been proposed to contain a promising candidate for a gravitational-wave recoiling supermassive black hole (SMBH), a slingshot SMBH from a triple-SMBH interaction, or a kiloparsec-scale dual
Externí odkaz:
https://doaj.org/article/a40775ce67c14531a4a1fa1e97235030
Autor:
Junyao Li, Xin Liu, Yue Shen, Masamune Oguri, Arran C. Gross, Nadia L. Zakamska, Yu-Ching Chen, Hsiang-Chih Hwang
Publikováno v:
The Astrophysical Journal Letters, Vol 955, Iss 1, p L16 (2023)
We report Hubble Space Telescope (HST) Wide Field Camera 3 deep IR (F160W) imaging of SDSS J1608+2716. This system, located at a redshift of z = 2.575, was recently reported as a triple-quasar candidate with subarcsecond separations (∼0.″25) base
Externí odkaz:
https://doaj.org/article/23d4791fcbe04093b4f760c0e24a3462
Autor:
Eilat Glikman, Rachel Langgin, Makoto A. Johnstone, Ilsang Yoon, Julia M. Comerford, Brooke D. Simmons, Hannah Stacey, Mark Lacy, John M. O’Meara
Publikováno v:
The Astrophysical Journal Letters, Vol 951, Iss 1, p L18 (2023)
We report the discovery of a candidate dual QSO at z = 1.889, a redshift that is in the era known as “cosmic noon” where most of the universe’s black hole and stellar mass growth occurred. The source was identified in Hubble Space Telescope WFC
Externí odkaz:
https://doaj.org/article/a0df07cdcdc949908ef43f1a116db20a
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 2, p 61 (2023)
The time delay between multiple images of strongly lensed quasars is a powerful tool for measuring the Hubble constant ( H _0 ). To achieve H _0 measurements with higher precision and accuracy using the time delay, it is crucial to expand the sample
Externí odkaz:
https://doaj.org/article/cf14be5427f2425ebcc2de8aa2ee6a58
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 1, p 47 (2023)
We present detailed analysis of the optical and near-infrared spectrum of the reddened radio-loud quasar F2M J154043.74+492323.9 with strong optical Fe ii emission of ${R}_{4570}\equiv \tfrac{\mathrm{Fe}\,{\rm\small{II}}\lambda \lambda \,4434,4684}{{
Externí odkaz:
https://doaj.org/article/46a6a8b2b23d40a5b1ed7300742e5616
Autor:
Yu-Ching Chen, Xin Liu, Joseph Lazio, Peter Breiding, Sarah Burke-Spolaor, Hsiang-Chih Hwang, Yue Shen, Nadia L. Zakamska
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 1, p 29 (2023)
Dual and off-nucleus active supermassive black holes are expected to be common in the hierarchical structure formation paradigm, but their identification at parsec scales remains a challenge due to strict angular resolution requirements. We conducted
Externí odkaz:
https://doaj.org/article/a87a2dff92e8448faa2ba7f8940d7439