Zobrazeno 1 - 10
of 150
pro vyhledávání: '"Gabányi, K. É."'
Autor:
Frey, S., Zhang, Y., Perger, K., An, T., Gabányi, K. É., Gurvits, L. I., Hwang, C. -Y., Koptelova, E., Paragi, Z., Fogasy, J.
Publikováno v:
Astronomy and Astrophysics, Vol. 681, L12 (2024)
The existence of accreting supermassive black holes up to billions of solar masses at early cosmological epochs (in the context of this work, redshifts z>=6) requires very fast growth rates which is challenging to explain. The presence of a relativis
Externí odkaz:
http://arxiv.org/abs/2312.15765
Publikováno v:
Monthly Notices of the Royal Astronomical Society, Volume 526, Issue 3, pp. 4698-4709 (December 2023)
In a previous work, we have identified the spin of the dominant black hole of a binary from its jet properties. Analysing Very Long Baseline Array (VLBA) observations of the quasar S5~1928+738, taken at $15$-GHz during $43$ epochs between $1995.96$ a
Externí odkaz:
http://arxiv.org/abs/2308.00153
Autor:
Benke, P., Gabányi, K. É., Frey, S., An, T., Gurvits, L. I., Kun, E., Mohan, P., Paragi, Z., Ros, E.
Publikováno v:
A&A 677, A1 (2023)
PSO J334.2028+1.4075 (PSO J334) is a luminous quasar located at redshift z=2.06. The source gained attention when periodic flux density variations were discovered in its optical light curve. These variations were initially interpreted as the variabil
Externí odkaz:
http://arxiv.org/abs/2306.17632
Publikováno v:
Proceedings of Science, Vol. 428, id. PoS(EVN2022)006 (2023)
X-ray binaries are known to show state transitions related to accretion rate changes which are often accompanied with dramatic changes in the jet emission. However, it is not clear whether this characteristics of stellar-mass black hole systems can b
Externí odkaz:
http://arxiv.org/abs/2304.10125
Autor:
Gabányi, K. É., Belladitta, S., Frey, S., Orosz, G., Gurvits, L. I., Rozgonyi, K., An, T., Cao, H., Paragi, Z., Perger, K.
Publikováno v:
Publications of the Astronomical Society of Australia, Vol. 40, id. E004 (2023)
Active galactic nuclei (AGN) have been observed as far as redshift z~7. They are crucial in investigating the early Universe as well as the growth of supermassive black holes at their centres. Radio-loud AGN with their jets seen at a small viewing an
Externí odkaz:
http://arxiv.org/abs/2301.04533
Autor:
Zhang, Y., An, T., Wang, A., Frey, S., Gurvits, L. I., Gabanyi, K. E., Perger, K., Paragi, Z.
Publikováno v:
A&A 662, L2 (2022)
The nature of jets in active galactic nuclei (AGN) in the early Universe and their feedback to the host galaxy remain a highly topical question. Observations of the radio structure of high-redshift AGNs enabled by very long baseline interferometry (V
Externí odkaz:
http://arxiv.org/abs/2205.05859
Autor:
Szabó, Zs. M., Bayandina, O., Kóspál, Á., Ábrahám, P., Gabányi, K. É., Nagy, Zs., Tóth, V. L., Heever, S. P. van den
We present the project of a VLBI study of the 22 GHz H$_2$O maser in a prototypical low-mass protostellar system IRAS 16293-2422. The observation was conducted to characterise the cause of the newly discovered enhanced maser activity in the source an
Externí odkaz:
http://arxiv.org/abs/2204.12910
Autor:
Krezinger, M., Perger, K., Gabányi, K. É., Frey, S., Gurvits, L. I, Paragi, Zs., An, T., Zhang, Y., Cao, H., Sbarrato, T.
High-redshift radio sources provide plentiful opportunities for studying the formation and evolution of early galaxies and supermassive black holes. However, the number of known radio-loud active galactic nuclei (AGN) above redshift 4 is rather limit
Externí odkaz:
http://arxiv.org/abs/2204.02114
Publikováno v:
Symmetry, Vol. 14, No. 2, id. 321 (2022)
The radio-loud quasar CTD 135 (2234+282, J2236+2828) has been proposed as a candidate compact symmetric object (CSO), based on its symmetric radio structure revealed by multi-frequency very long baseline interferometry (VLBI) imaging observations on
Externí odkaz:
http://arxiv.org/abs/2202.00950
Publikováno v:
Origins: From the Protosun to the First Steps of Life. Proceedings of the International Astronomical Union, Volume 345, pp. 128-131 (2020)
We present our results from a mid-infrared interferometric survey targeted at the planet-forming region in the circumstellar disks around low- and intermediate-mass young stars. Our sample consist of 82 objects, including T Tauri stars, Herbig Ae sta
Externí odkaz:
http://arxiv.org/abs/2002.05543