Zobrazeno 1 - 10
of 299
pro vyhledávání: '"Chugai, N."'
Autor:
Churazov, E., Khabibullin, I., Bykov, A. M., Chugai, N. N., Sunyaev, R. A., Utrobin, V. P., Zinchenko, I. I.
We argue that the North Polar Spur (NPS) and many less prominent structures are formed by gaseous metal-rich plumes associated with star-forming regions (SFRs). The SFRs located at the tangent to the 3-5 kpc rings might be particularly relevant to NP
Externí odkaz:
http://arxiv.org/abs/2408.00752
Autor:
Utrobin, V. P., Chugai, N. N.
Publikováno v:
Astrophys. Space Sci., volume 369, Article 49, Year 2024
We present an alternative model of unusual type-IIP SN 2018gj. Despite the short plateau and early gamma-rays escape seeming to favor low-mass ejecta, our hydrodynamic model requires a large ejected mass (about 23 Msun). The high ejecta velocity, we
Externí odkaz:
http://arxiv.org/abs/2405.12867
Autor:
Utrobin, V. P., Chugai, N. N.
We present the hydrodynamic model of Type IIP SN 2020jfo with the unusually short (nearly 60 days) light curve plateau. The model suggests the explosion of about 8 Msun red supergiant that ejected nearly 6 Msun with the energy of about 0.8x10^51 erg.
Externí odkaz:
http://arxiv.org/abs/2311.13696
We report the discovery of a candidate X-ray supernova remnant SRGe J003602.3+605421=G121.1-1.9 in the course of \textit{SRG}/eROSITA all-sky survey. The object is located at (l,b)=(121.1$^\circ$,-1.9$^\circ$), is $\approx36$ arcmin in angular size a
Externí odkaz:
http://arxiv.org/abs/2207.00064
Autor:
Churazov, E. M., Khabibullin, I. I., Bykov, A. M., Chugai, N. N., Sunyaev, R. A., Zinchenko, I. I.
A supernova remnant (SNR) candidate SRGe~J0023+3625 = G116.6-26.1 was recently discovered in the \textit{SRG}/eROSITA all-sky X-ray survey. This large ($\sim 4$ deg in diameter) SNR candidate lacks prominent counterparts in other bands. Here we repor
Externí odkaz:
http://arxiv.org/abs/2203.06726
Autor:
Churazov, E. M., Khabibullin, I. I., Bykov, A. M., Chugai, N. N., Sunyaev, R. A., Zinchenko, I. I.
We report a discovery of a new X-ray-selected supernova remnant (SNR) candidate SRGe~J0023+3625 = G116.6-26.1 found in the SRG/eROSITA all-sky survey. The source features a large angular extent ($\sim 4$ deg in diameter), nearly circular shape and X-
Externí odkaz:
http://arxiv.org/abs/2106.09454
Autor:
Utrobin, V. P., Chugai, N. N., Andrews, J. E., Smith, N., Jencson, J., Howell, D. A., Burke, J., Hiramatsu, D., McCully, C., Bostroem, K. A.
The unusual Type IIP SN 2017gmr is revisited in order to pinpoint the origin of its anomalous features, including the peculiar light curve after about 100 days. The hydrodynamic modelling suggests the enormous explosion energy of about 10^52 erg. We
Externí odkaz:
http://arxiv.org/abs/2105.04606
Autor:
Chugai, N. N., Kudryashov, A. D.
We explore for the first time effects of the magnetic field on the escape of $^{22}$Na positrons and on the flux evolution of annihilation 511 keV line in novae. It is shown that for the white dwarf magnetic field of $\sim 10^6$ G the field of the ex
Externí odkaz:
http://arxiv.org/abs/2103.04716
Autor:
Predehl, P., Sunyaev, R. A., Becker, W., Brunner, H., Burenin, R., Bykov, A., Cherepashchuk, A., Chugai, N., Churazov, E., Doroshenko, V., Eismont, N., Freyberg, M., Gilfanov, M., Haberl, F., Khabibullin, I., Krivonos, R., Maitra, C., Medvedev, P., Merloni, A., Nandra, K., Nazarov, V., Pavlinsky, M., Ponti, G., Sanders, J. S., Sasaki, M., Sazonov, S., Strong, A. W., Wilms, J.
Publikováno v:
Nature, 588, 227-231 (2020)
The halo of the Milky Way provides a laboratory to study the properties of the shocked hot gas that is predicted by models of galaxy formation. There is observational evidence of energy injection into the halo from past activity in the nucleus of the
Externí odkaz:
http://arxiv.org/abs/2012.05840
Autor:
Chugai, N. N., Kudryashov, A. D.
Resonance lines of $^7$Be are detected currently in five novae. Available abundances for this isotope estimated from equivalent widths of $^7$Be\,II and Ca\,II lines are significantly higher compared to predictions of models for the thermonuclear fla
Externí odkaz:
http://arxiv.org/abs/2007.07044