75 citations · 283 across the 17 of their papers we have counts for
18 papers
New constraints on the presence of debris disks around G 196-3 B and VHS J125601.92-125723.9 b
O. V. Zakhozhay, M. R. Zapatero Osorio, V. J. S. Bejar +10
We obtained deep images of G 196-3 B and VHS J1256-1257 b with the NOrthern Extended Millimeter Array (NOEMA) at 1.3 mm. These data were combined with recently published Atacama La…
Radial Velocity Survey for Planets around Young stars (RVSPY) A transiting warm super-Jovian planet around HD 114082, a young star with a debris disk
O. Zakhozhay, R. Launhardt, T. Trifonov +7
Aiming to detect planetary companions to young stars with debris disks via the radial velocity method, we observed HD114082 during April 2018 - August 2022 as one of the targets of…
RVSPY -- Radial Velocity Survey for Planets around Young Stars. Target characterization and high-cadence survey
O. Zakhozhay, R. Launhardt, A. Mueller +15
We introduce our Radial Velocity Survey for Planets around Young stars (RVSPY), characterise our target stars, and search for substellar companions at orbital separations smaller t…
A new third planet and the dynamical architecture of the HD33142 planetary system
Trifon Trifonov, Anna Wollbold, Martin Kürster +24
Based on recently-taken and archival HARPS, FEROS and HIRES radial velocities (RVs), we present evidence for a new planet orbiting the first ascent red giant star HD33142 (with an…
Dynamical architecture of the HD 107148 system
Jan Eberhardt, Trifon Trifonov, Martin Kürster +15
We present an independent Doppler validation and dynamical orbital analysis of the two-planet system HD 107148, which was recently announced in Rosenthal et al. (2021). Our detaile…
Radio emission in a nearby ultracool dwarf binary: a multi-frequency study
Juan B. Climent, J. C. Guirado, M. R. Zapatero-Osorio +8
The substellar triple system VHS J125601.92125723.9 is composed by an equal-mass M7.5 brown dwarf binary and a L7 low-mass substellar object. In this work, we aim to identify th…
Four Jovian planets around low-luminosity giant stars observed by the EXPRESS and PPPS
M. I. Jones, R. Wittenmyer, C. Aguilera-Gómez +12
We report the discovery of planetary companions orbiting four low-luminosity giant stars with M between 1.04 and 1.39 M. All four host stars have been independently…
Properties of Galactic B[e] Supergiants: V. 3 Pup -- constraining the orbital parameters and modeling the circumstellar environments
A. S. Miroshnichenko, S. Danford, S. V. Zharikov +9
We report the results of a long-term spectroscopic monitoring of the A-type supergiant with the B[e] phenomenon 3 Pup = HD 62623. We confirm earlier findings that it is a binary sy…
New HARPS and FEROS observations of GJ1046
Trifon Trifonov, Martin Kürster, Sabine Reffert +16
In this paper we present new precise Doppler data of GJ1046 taken between November 2005 and July 2018 with the HARPS and the FEROS high-resolution spectographs. In addition, we pro…
IRAS 22150+6109 - a young B-type star with a large disc
Olga V. Zakhozhay, Anatoly S. Miroshnichenko, Kenesken S. Kuratov +4
We present the results of a spectroscopic analysis and spectral energy distribution (SED) modelling of the optical counterpart of the infrared source IRAS 22150+6109. The source wa…
The transiting multi-planet system HD3167: a 5.7 MEarth Super-Earth and a 8.3 MEarth mini-Neptune
Davide Gandolfi, Oscar Barragán, Artie P. Hatzes +42
HD3167 is a bright (V=8.9 mag) K0V star observed by the NASA's K2 space mission during its Campaign 8. It has been recently found to host two small transiting planets, namely, HD31…
Three planets around HD 27894. A close-in pair with a 2:1 period ratio and an eccentric Jovian planet at 5.4 AU
T. Trifonov, M. Kürster, M. Zechmeister +6
Aims. Our new program with HARPS aims to detect mean motion resonant planetary systems around stars which were previously reported to have a single bona fide planet, often based on…
The Influences of Forming Companions on the Spectral Energy Distributions of Stars with Circumstellar Discs
Olga V. Zakhozhay
We study a possibility to detect signatures of brown dwarf companions in a circumstellar disc based on spectral energy distributions (SED). We present the results of SED simulation…
K2-139 b: a low-mass warm Jupiter on a 29-day orbit transiting an active K0 V star
O. Barragán, D. Gandolfi, A. M. S. Smith +27
We announce the discovery of K2-139 b (EPIC 218916923 b), a transiting warm-Jupiter (=54725 K) on a 29-day orbit around an active (log =…
Spectral energy distribution simulations of a possible ring structure around the young, red brown dwarf G196-3B
Olga V. Zakhozhay, María Rosa Zapatero Osorio, Víctor J. S. Béjar +1
The origin of the very red optical and infrared colours of intermediate-age (10 - 500 Myr) L-type dwarfs remains unknown. It has been suggested that low-gravity atmospheres c…
Fragmenting protostellar disks: properties and observational signatures
Eduard Vorobyov, Olga Zakhozhay, Michael Dunham
Using numerical hydrodynamic simulations, we study the gravitational fragmentation of an unstable protostellar disc formed during the collapse of a pre-stellar core with a mass of…
Simulation of the Continuous Spectrum of Substars with Protoplanetary Discs
O. V. Zakhozhay, A. P. Vid'machenko, V. A. Zakhozhay
The continuous spectra of the substars with surrounding protoplanetary disks were calculated. The results reveal that protoplanetary disc average temperature decreases to 3 K durin…
Catalogue of Planetary Objects. Version 2006.0
O. V. Zakhozhay, V. A. Zakhozhay, Yu. N. Krugly
The analysis of the density and brightness of big planets satellites, main asteroid belt objects, Kuiper belt objects and centaurs has been carried out as well as the analysis of s…