902 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Bulgarian Academy of SciencesBG224 papers
- Centre National de la Recherche ScientifiqueFR67 papers
- Sofia University "St. Kliment Ohridski"BG64 papers
- Shumen UniversityBG62 papers
- Instituto de Astrofísica de CanariasES57 papers
- Instituto de Astrofísica de AndalucíaES55 papers
- National Institute for AstrophysicsIT54 papers
- Universidad de La LagunaES50 papers
- Astronomical ObservatoryRS48 papers
- Evgeni Kharadze Georgian National Astrophysical ObservatoryGE45 papers
- Aryabhatta Research Institute of Observational SciencesIN43 papers
- Osservatorio Astrofisico di TorinoIT43 papers
15 papers · 1 filter
Tracing the high-z cosmic web with Quaia: catalogues of voids and clusters in the quasar distribution
Nestor Arsenov, Andras Kovacs, Mar Perez Sar +5
Understanding the formation and evolution of the cosmic web of galaxies is a fundamental goal of cosmology, using various tracers of the cosmic large-scale structure at an ever wid…
Toward More Realistic Mass Functions For Ultradense Dark Matter Halos
Saeed Fakhry, Marzieh Farhang, Antonino Del Popolo
Ultradense dark matter halos (UDMHs) are high concentrations of dark matter, assumed to have formed deep in the radiation-dominated era from amplified primordial perturbations. In…
The origin of spin in galaxies: clues from simulations of atomic cooling halos
Joaquin Prieto, Raul Jimenez, Zoltán Haiman +1
In order to elucidate the origin of spin in both dark matter and baryons in galaxies, we have performed hydrodynamical simulations from cosmological initial conditions. We study at…
Lepton Asymmetry and Neutrino Oscillations Interplay
Daniela Kirilova
We discuss the interplay between lepton asymmetry L and neutrino oscillations in the early Universe. Neutrino oscillations may suppress or enhance previously existing L. On the oth…
Quasi-simultaneous two band optical variability of the blazars 1ES 1959+650 and 1ES 2344+514
Haritma Gaur, Alok C. Gupta, A. Strigachev +8
We report the results of quasi-simultaneous two filter optical monitoring of two high-energy peaked blazars, 1ES 1959+650 and 1ES 2344+514, to search for microvariability and short…
Observatons of NGC 3077 Galaxy in Narrow Band [SII] and H_alpha Filters
M. Andjelic, K. Stavrev, B. Arbutina +2
We present observations of the HI tidal arm near dwarf galaxy NGC 3077 (member of the M81 galaxy group) in narrow band [SII] and H_alpha filters. Observations were carried out in M…
Spectra probing the number ratio of C- to M-type AGB stars in the NGC 6822 galaxy
Nikolay Kacharov, Marina Rejkuba, Maria-Rosa L. Cioni
Aims: We calibrate spectroscopically the C- versus (vs.) M-type asymptotic giant branch (AGB) star selection made using near-IR photometry, and investigate the spatial distribution…
Spectral Energy Distribution variation in BL Lacs and FSRQs
Bindu Rani, Alok C. Gupta, R. Bachev +9
We present the results of our study of spectral energy distributions (SEDs) of a sample of ten low- to intermediate-synchrotron-peaked blazars. We investigate some of the physical…
Optical multiband surface photometry of a sample of Seyfert galaxies. III. Global, isophotal, and bar parameters
L. Slavcheva-Mihova, B. Mihov
This paper is third in a series, studying the optical properties of a sample of Seyfert galaxies. Here we present a homogeneous set of global (ellipticity, position angle, inclinat…
Optical multiband surface photometry of a sample of Seyfert galaxies. I. Large-scale morphology and local environment analysis of matched Seyfert and inactive galaxy samples
L. Slavcheva-Mihova, B. Mihov
Parallel analysis of the large-scale morphology and local environment of matched active and control galaxy samples plays an important role in studies of the fueling of active galac…
Broad Line Region Physical Conditions along the Quasar Eigenvector 1 Sequence
P. Marziani, J. W. Sulentic, C. A. Negrete +3
[Abridged] We compare broad emission line profiles and estimate line ratios for all major emission lines between Ly-alpha and H-beta in a sample of six quasars. The sources were ch…
Optical Observations of M81 Galaxy Group in Narrow Band [SII] and H_alpha Filters: Holmberg IX
B. Arbutina, D. Ilic, K. Stavrev +3
We present observations of the nearby tidal dwarf galaxy Holmberg IX in M81 galaxy group in narrow band [SII] and H filters, carried out in March and November 2008 with the 2m R…
The GASP-WEBT monitoring of 3C 454.3 during the 2008 optical-to-radio and gamma-ray outburst
M. Villata, C. M. Raiteri, M. A. Gurwell +6
Since 2001, the radio quasar 3C 454.3 has undergone a period of high optical activity, culminating in the brightest optical state ever observed, during the 2004-2005 outburst. The…
Studying X-ray reprocessing and continuum variability in quasars: PG 1211+143
R. Bachev, D. Grupe, S. Boeva +5
We present the results from a monitoring campaign of the Narrow-Line Seyfert~1 galaxy PG 1211+143. The object was monitored with ground-based facilities (UBVRI photometry; from Feb…
The evolution of early and late type galaxies in the COSMOS up to z~1.2
Maurilio Pannella, Armin Gabasch, Yuliana Goranova +6
The Cosmic Evolution Survey (COSMOS) allows for the first time a highly significant census of environments and structures up to redshift one, as well as a full morphological descri…