Zobrazeno 1 - 10
of 237
pro vyhledávání: '"Chelouche, D."'
Autor:
Fian, C., Jiménez-Vicente, J., Mediavilla, E., Muñoz, J. A., Chelouche, D., Kaspi, S., Forés-Toribio, R.
We introduce a novel method to derive rotation curves with light-day spatial resolution of the inner regions of lensed quasars. We aim to probe the kinematics of the inner part of the broad-line region (BLR) by resolving the microlensing response - a
Externí odkaz:
http://arxiv.org/abs/2407.13381
Autor:
Fian, C., Muñoz, J. A., Jiménez-Vicente, J., Mediavilla, E., Chelouche, D., Kaspi, S., Forés-Toribio, R.
We aim to unveil the structure of the continuum and broad-emission line (BEL) emitting regions in the gravitationally lensed quasar SDSS J1339+1310 by examining the distinct signatures of microlensing present in this system. Our study involves a comp
Externí odkaz:
http://arxiv.org/abs/2407.05942
Autor:
Ochmann, M. W., Kollatschny, W., Probst, M. A., Romero-Colmenero, E., Buckley, D. A. H., Chelouche, D., Chini, R., Grupe, D., Haas, M., Kaspi, S., Komossa, S., Parker, M. L., Santos-Lleo, M., Schartel, N., Famula, P.
Publikováno v:
A&A 686, A17 (2024)
NGC 1566 is known for exhibiting recurrent outbursts, which are accompanied by changes in spectral type. The most recent transient event occurred from 2017 to 2019 and was reported to be accompanied by a change in Seyfert classification from Seyfert
Externí odkaz:
http://arxiv.org/abs/2402.12054
Autor:
North, P., Hayes, M., Millon, M., Verhamme, A., Trebitsch, M., Blaizot, J., Courbin, F., Chelouche, D.
The radio-quiet quasar SDSS J1240+1455 lies at a redshift of z=3.11, is surrounded by a Ly-alpha blob (LAB), and is absorbed by a proximate damped Ly-alpha system. In order to better define the morphology of the blob and determine its emission mechan
Externí odkaz:
http://arxiv.org/abs/2402.08488
Autor:
Fian, C., Muñoz, J. A., Forés-Toribio, R., Mediavilla, E., Jiménez-Vicente, J., Chelouche, D., Kaspi, S., Richards, G. T.
We aim to reveal the sizes of the continuum and broad emission line (BEL) emitting regions in the gravitationally lensed quasar SDSS J1004+4112 by analyzing the unique signatures of microlensing in this system. Through a comprehensive analysis of 20
Externí odkaz:
http://arxiv.org/abs/2310.11212
Autor:
Oknyansky, V. L., Brotherton, M. S., Tsygankov, S. S., Dodin, A. V., Tatarnikov, A. M., Du, P., Bao, D. -W., Burlak, M. A., Ikonnikova, N. P., Lipunov, V. M., Gorbovskoy, E. S., Metlov, V. G., Belinski, A. A., Shatsky, N. I., Zheltouhov, S. G., Maslennikova, N. A., Wang, J. -M., Zhai, S., Fang, F. -N., Fu, Y. -X., Bai, H. -R., Kasper, D., Huseynov, N. A., McLane, J. N., Maithil, J., Zastrocky, T. E., Olson, K. A., Chen, X., Chelouche, D., Oknyansky, R. S., Buckley, D. A. H., Tyurina, N. V., Kuznetsov, A. S., Rebolo, R. L., Zhao, B. -X.
We present the results of photometric and spectroscopic monitoring campaigns of the changing look AGN NGC~2617 carried out from 2016 until 2022 and covering the wavelength range from the X-ray to the near-IR. The facilities included the telescopes of
Externí odkaz:
http://arxiv.org/abs/2308.04855
Publikováno v:
A&A 677, A94 (2023)
We investigate the discrepancy between the predicted size of accretion disks (ADs) in quasars and the observed sizes as deduced from gravitational microlensing studies. Specifically, we aim to understand whether the discrepancy is due to an inadequac
Externí odkaz:
http://arxiv.org/abs/2307.14824
Autor:
Fian, C., Muñoz, J. A., Mediavilla, E., Jiménez-Vicente, J., Motta, V., Chelouche, D., Wurzer, A., Hanslmeier, A., Rojas, K.
Publikováno v:
A&A 678, A108 (2023)
Our aim is to examine the size, kinematics, and geometry of the broad-line region (BLR) in the double-lensed quasar Q 0957+561 by analyzing the impact of microlensing on various rest-frame ultraviolet broad-emission lines (BELs). We explore the influ
Externí odkaz:
http://arxiv.org/abs/2307.02914
Autor:
Shvartzvald, Y., Waxman, E., Gal-Yam, A., Ofek, E. O., Ben-Ami, S., Berge, D., Kowalski, M., Bühler, R., Worm, S., Rhoads, J. E., Arcavi, I., Maoz, D., Polishook, D., Stone, N., Trakhtenbrot, B., Ackermann, M., Aharonson, O., Birnholtz, O., Chelouche, D., Guetta, D., Hallakoun, N., Horesh, A., Kushnir, D., Mazeh, T., Nordin, J., Ofir, A., Ohm, S., Parsons, D., Pe'er, A., Perets, H. B., Perdelwitz, V., Poznanski, D., Sadeh, I., Sagiv, I., Shahaf, S., Soumagnac, M., Tal-Or, L., Van Santen, J., Zackay, B., Guttman, O., Rekhi, P., Townsend, A., Weinstein, A., Wold, I.
The Ultraviolet Transient Astronomy Satellite (ULTRASAT) is scheduled to be launched to geostationary orbit in 2026. It will carry a telescope with an unprecedentedly large field of view (204 deg$^2$) and NUV (230-290nm) sensitivity (22.5 mag, 5$\sig
Externí odkaz:
http://arxiv.org/abs/2304.14482
Autor:
Lewis, T. R., Chelouche, D.
Line locking (LL) of absorption line systems is a clear signature of the dynamical importance of radiation pressure force in driving astrophysical flows, with recent findings suggesting that it may be common in quasars exhibiting multiple intrinsic n
Externí odkaz:
http://arxiv.org/abs/2302.09669