The Main Sequence of Stars

Autor: Saha, Prasenjit, author, Taylor, Paul A., author

Publikováno v: The Astronomers' Magic Envelope : An Introduction to Astrophysics Emphasizing General Principles and Orders of Magnitude, 2018.

Externí odkaz: https://doi.org/10.1093/oso/9780198816461.003.0007

Optical Identification of Candidates for Active Galactic Nuclei Detected by the Mikhail Pavlinsky ART-XC Telescope Onboard the SRG Observatory during an All-Sky X-ray Survey

Autor: R. A. Burenin, P. S. Medvedev, E. A. Nikolaeva, I. A. Zaznobin, Roman Krivonos, E. V. Filippova, Marat Gilfanov, R. A. Sunyaev, M. V. Eselevich, G. A. Khorunzhev, I. F. Bikmaev, A. R. Lyapin, G. S. Uskov, E. Irtuganov, S. Yu. Sazonov

Publikováno v: Astronomy Letters. 47:71-87

We present the results of our identification of eight objects from the preliminary catalogue of X-ray sources detected in the 4–12 keV energy band by the Mikhail Pavlinsky ART-XC telescope onboard the SRG observatory during the first all-sky survey

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6ab6641f770b5ebcf6acfe481b7fc387
https://doi.org/10.1134/s1063773721020067

A parsec-scale faint jet in the nearby changing-look Seyfert galaxy Mrk 590

Autor: Zsolt Paragi, J. B. R. Oonk, Xiang Liu, Ilse van Bemmel, Xiaolong Yang, Jun Yang, Jun Yi Koay, Tao An, S. Komossa, C. S. Reynolds, Qingwen Wu, Feng Yuan

Publikováno v: Monthly Notices of the Royal Astronomical Society, 502(1), L61-L65

Broad Balmer emission lines in active galactic nuclei (AGN) may display dramatic changes in amplitude, even disappearance and re-appearance in some sources. As a nearby galaxy at a redshift of z = 0.0264, Mrk 590 suffered such a cycle of Seyfert type

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5ea7c5c4fa5e976739bba192e8bc9c30
https://doi.org/10.1093/mnrasl/slab005

Measuring the distance to the black hole candidate X-ray binary MAXI J1348–630 using H i absorption

Autor: J. C. A. Miller-Jones, Rob Fender, G. E. Anderson, W. Raja, Patrick Woudt, Matthew Whiting, Jai Verdhan Chauhan, B. S. Koribalski, P. F. L. Jacob, James R. Allison, Elizabeth K. Mahony, S. Corbel, F. Carotenuto, Aidan Hotan

Publikováno v: Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 501 (1), pp.L60-L64. ⟨10.1093/mnrasl/slaa195⟩
Monthly Notices of the Royal Astronomical Society, 2021, 501 (1), pp.L60-L64. ⟨10.1093/mnrasl/slaa195⟩

We present HI absorption spectra of the black hole candidate X-ray binary (XRB) MAXI J1348-630 using the Australian Square Kilometre Array Pathfinder (ASKAP) and MeerKAT. The ASKAP HI spectrum shows a maximum negative radial velocity (with respect to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5250e86e79031dac3eab7c49c68a23f
https://doi.org/10.1093/mnrasl/slaa195

The first high-redshift changing-look quasars

Autor: Barry McKernan, Nicholas P. Ross, K. E. Saavik Ford, Daniel Stern, Matthew J. Graham, Giorgio Calderone

Publikováno v: Monthly Notices of the Royal Astronomical Society. 498:2339-2353

We report on three redshift $z>2$ quasars with dramatic changes in their C IV emission lines, the first sample of changing-look quasars (CLQs) at high redshift. This is also the first time the changing-look behaviour has been seen in a high-ionisatio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13a64a47185ced912f981dc46abd1b2e
https://doi.org/10.1093/mnras/staa2415