Zobrazeno 1 - 10
of 1 471
pro vyhledávání: '"Chavushyan"'
Autor:
Kosiba, M., Massaro, F., Paggi, A., Peña-Herazo, H. A., Masetti, N., Chavushyan, V., Bottacini, E., Werner, N.
It is currently established that the sources contributing to the cosmic X-ray background (CXB) emission are mainly nearby active galactic nuclei (AGN), in particular those that are obscured. Thus, it is important to fully identify the hard X-ray sky
Externí odkaz:
http://arxiv.org/abs/2408.05303
The Ground-based Observational Support of the Fermi Gamma-ray Space Telescope is conducted by the University of Arizona using the 2.3m Bok and 1.54m Kuiper telescopes operated by the Steward Observatory (SO). This program monitors blazar sources with
Externí odkaz:
http://arxiv.org/abs/2406.05321
Autor:
Massaro, F., White, S. V., Paggi, A., Jimenez-Gallardo, A., Madrid, J. P., Mazzucchelli, C., Forman, W. R., Capetti, A., Leto, C., Garcia-Perez, A., Cheung, C. C., Chavushyan, V., Nesvadba, N. P. H., Andruchow, I., Pena-Herazo, H. A., Sani, E., Grossova, R., Reynaldi, V., Kraft, R. P., Balmaverde, B., Cellone, S.
Publikováno v:
The Astrophysical Journal Supplement Series, 268, 32 (2023)
We recently constructed the G4Jy-3CRE, a catalog of extragalactic radio sources based on the GLEAM 4-Jy (G4Jy) sample, with the aim of increasing the number of powerful radio galaxies and quasars with similar selection criteria to those of the revise
Externí odkaz:
http://arxiv.org/abs/2309.10956
Autor:
Massaro, F., White, S. V., Garcia-Perez, A., Jimenez-Gallardo, A., Capetti, A., Cheung, C. C., Forman, W. R., Mazzucchelli, C., Paggi, A., Nesvadba, N. P. H., Madrid, J. P., Andruchow, I., Cellone, S., Pena-Herazo, H. A., Grossova, R., Balmaverde, B., Sani, E., Chavushyan, V., Kraft, R. P., Reynaldi, V., Leto, C.
Publikováno v:
The Astrophysical Journal Supplement Series, 265, 32 (2023)
Since the early sixties, our view of radio galaxies and quasars has been drastically shaped by discoveries made thanks to observations of radio sources listed in the Third Cambridge catalog and its revised version (3CR). However, the largest fraction
Externí odkaz:
http://arxiv.org/abs/2308.10071
Autor:
Popović, Luka C., Ilić, Dragana, Burenkov, Alexander, Álvarez, Victor Manuel Patiño, Marceta-Mandić, Sladjana, Dojcinović, Jelena Kovacević, Shablovinskaya, Elena, Kovacević, Andjelka B., Marziani, Paola, Chavushyan, Vahram, Wang, Jian-Min, Li, Yan-Rong, Mediavilla, Evencio G.
Publikováno v:
A&A 675, A178 (2023)
We analyze the broad H$\beta$ line profile variability of the "changing look" active galactic nucleus (CL-AGN) NGC 3516 over a long period of 25 years. The observed change in the broad line profile may indicate a change in the geometry of the broad l
Externí odkaz:
http://arxiv.org/abs/2306.00669
Autor:
Hernández-García, L., Panessa, F., Bruni, G., Bassani, L., Arévalo, P., Patiño-Alvarez, V. M., Tramacere, A., Lira, P., Sánchez-Sáez, P., Bauer, F. E., Chavushyan, V., Carraro, R., Förster, F., Arancibia, A. M. Muñoz, Ubertini, P.
PBC J2333.9-2343 is a giant radio galaxy at z = 0.047 with a bright central core associated to a blazar nucleus. If the nuclear blazar jet is a new phase of the jet activity, then the small orientation angle suggest a dramatic change of the jet direc
Externí odkaz:
http://arxiv.org/abs/2303.08842
We present new optical spectroscopic observations of U Geminorum obtained during a quiescent stage. We performed a radial velocity analysis of three Balmer emission lines yielding inconsistent results. Assuming that the radial velocity semi amplitude
Externí odkaz:
http://arxiv.org/abs/2303.05625
Autor:
Longinotti, Anna Lia, Salomé, Quentin, Feruglio, Chiara, Krongold, Yair, García-Burillo, Santiago, Giroletti, Marcello, Panessa, Francesca, Stanghellini, Carlo, Vega, Olga, Patiño-Álvarez, Victor Manuel, Chavushyan, Vahram, Elías-Chavez, Mauricio, Robleto-Orús, Aitor
The Narrow Line Seyfert 1 Galaxy IRAS17020+4544 is one of the few AGN where a galaxy-scale energy-conserving outflow was revealed. This paper reports on NOEMA observations addressed to constrain the spatial scale of the CO emission in outflow. The mo
Externí odkaz:
http://arxiv.org/abs/2302.08165
Autor:
Marchesini, E. J., Reynaldi, V., Vieyro, F., Saponara, J., Andruchow, I., López, I. E., Benaglia, P., Cellone, S. A., Masetti, N., Massaro, F., Peña-Herazo, H. A., Chavushyan, V., Combi, J. A., Acosta-Pulido, J. A., González, B. Agís, Castro-Segura, N.
Publikováno v:
A&A 670, A91 (2023)
Context. The gamma-ray emitting source WISE J141046.00+740511.2 has been associated with a Fermi-LAT detection by crossmatching with Swift/XRT data. It has shown all the canonical observational characteristics of a BL Lac source, including a power-la
Externí odkaz:
http://arxiv.org/abs/2211.08174
Publikováno v:
Open Astronomy, Vol 21, Iss 1-2, Pp 200-205 (2012)
A new emission line star was discovered on the plates of the Second Byurakan Survey (SBS). the follow up spectroscopy demonstrated that the object had a spectrum dominated by a late-type giant star with superposed hydrogen emission lines. the object
Externí odkaz:
https://doaj.org/article/9013aa1e77cd4430b73d7ba0110c9d69