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Yang, Jun (author), Paragi, Zsolt (author), Frey, Sándor (author), Gurvits, L. (author), Liao, Mai (author), Liu, Xiang (author), Cui, Lang (author), Yang, Xiaolong (author), Chen, Wen (author)Dwarf galaxies are characterized by a very low luminosity and low mass. Because of significant accretion and ejection activity of massive black holes, some dwarf galaxies also host low-luminosity active galactic nuclei (AGNs). In a few dwarf AGNs, very long baseline interferometry (VLBI) observations have found faint non-thermal radio...journal article 2023
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Yang, Jun (author), Yang, Xiaolong (author), Wrobel, Joan M. (author), Paragi, Zsolt (author), Gurvits, L. (author), Ho, Luis C. (author), Nyland, Kristina (author), Fan, Lulu (author), Tafoya, Daniel (author)NGC 4395 is a dwarf galaxy at a distance of about 4.3 Mpc (scale: ∼0.021 pc mas-1). It hosts an intermediate-mass black hole (IMBH) with a mass between ∼104 and ∼105 solar masses. The early radio observations of NGC 4395 with the very long baseline interferometry (VLBI) network, High Sensitivity Array (HSA), at 1.4 GHz in 2005 showed that its...journal article 2022
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Yang, Jun (author), Chen, Yongjun (author), Gurvits, L. (author), Paragi, Zsolt (author), Yang, Aiyuan (author), Yang, Xiaolong (author), Shen, Zhiqiang (author)In the time domain, the radio sky in particular along the Galactic plane direction may vary significantly because of various energetic activities associated with stars, stellar, and supermassive black holes. Multi-epoch Very Large Array surveys of the Galactic plane at 5.0 GHz enabled the finding of a catalogue of 39 variable radio sources in...journal article 2022
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Litvinov, D.A. (author), Bach, U. (author), Bartel, N. (author), Belousov, K.G. (author), Bietenholz, M. (author), Biriukov, A.V. (author), Cimo, G (author), Duev, D. A. (author), Gurvits, L. (author), Gusev, A.V. (author), Haas, R (author), Kauts, V.L. (author), Kanevsky, B.Z. (author), Kovalenko, A.V. (author), Kronschnabl, G (author), Kulagin, V.V. (author), Lindqvist, Maria (author), Molera Calves, G (author), Neidhardt, A. (author), Plotz, C. (author), Pogrebenko, S. V. (author), Porayko, N.K. (author), Rudenko, V.N. (author), Sokolovsky, K. V. (author), Smirnov, A.I. (author), Stepanyants, V.A. (author), Yang, J. (author), Zakhvatkin, M.V. (author)A test of a cornerstone of general relativity, the gravitational redshift effect, is currently being conducted with the RadioAstron spacecraft, which is on a highly eccentric orbit around Earth. Using ground radio telescopes to record the spacecraft signal, synchronized to its ultra-stable on-board H-maser, we can probe the varying flow of time...conference paper 2016
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Cao, H.M. (author), Frey, S. (author), Gurvits, L. (author), Yang, J. (author), Hong, X.Y. (author), Paragi, Z. (author), Deller, A.T. (author), Ivezic, Z. (author)A patch of sky in the SDSS Stripe 82 was observed at 1.6 GHz with Very Long Baseline Interferometry (VLBI) using the European VLBI Network (EVN). The data were correlated at the EVN software correlator at JIVE (SFXC). There are fifteen known mJy/sub-mJy radio sources in the target field defined by the primary beam size of a typical 30-m class...journal article 2014
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