Search Publications
European VLBI Network Observations of the Proposed Dual AGN SDSS J101022.95+141300.9
Paragi, Zsolt; Frey, Sándor; Gabányi, Krisztina Éva +3 more
During galaxy merger events, the supermassive black holes in the center of the galaxies may form a pair of active galactic nuclei (AGN) with kiloparsec-scale or even parsec-scale separation. Recently, optical observations revealed a promising dual-AGN candidate at the center of the galaxy SDSS J101022.95+141300.9 (hereafter J1010+1413). The presen…
Strongly lensed candidates from the HSC transient survey
Suyu, Sherry H.; Jaelani, Anton T.; Nagao, Tohru +5 more
We present a lensed quasar search based on the variability of lens systems in the Hyper Suprime-Cam (HSC) transient survey. Starting from 101 353 variable objects with i-band photometry in the HSC transient survey, we used a variability-based lens search method measuring the spatial extent in difference images to select potential lensed quasar can…
Wide companions to M and L subdwarfs with Gaia and the Virtual Observatory
Cortés-Contreras, M.; Solano, E.; Lodieu, N. +3 more
Aims: The aim of the project is to identify wide common proper motion companions to a sample of spectroscopically confirmed M and L metal-poor dwarfs (also known as subdwarfs) to investigate the impact of metallicity on the binary fraction of low-mass metal-poor binaries and to improve the determination of their metallicity from the higher-ma…
Nonequilibrium Ionization Plasma during a Large Solar Limb Flare Observed by Hinode/EIS
Imada, S.
This study on plasma heating considers the time-dependent ionization process during a large solar flare on 2017 September 10, observed by Hinode/EUV Imaging Spectrometer (EIS). The observed Fe XXIV/Fe XXIII ratios increase downstream of the reconnection outflow, and they are consistent with the time-dependent ionization effect at a constant electr…
Astrophysical parameters and dynamical evolution of open clusters: NGC 2587, Collinder 268 and Melotte 72, and Pismis 7
Çakmak, Hikmet; Karataş, Yüksel; Bonatto, Charles +1 more
We determined astrophysical and dynamical parameters of the open clusters (OCs) NGC 2587, Collinder 268 (Col 268), Melotte 72 (Mel 72), and Pismis 7 from Gaia DR2 photometric/astrometric data and a new technique, fitCMD. fitCMD provides (Z, Age(Gyr)) as (0.025, 0.45) for NGC 2587, (0.0025, 0.5) for Col 268, (0.011, 1.25) for Mel 72, and (0.008, 1.…
Analytic Estimates of the Achievable Precision on the Physical Properties of Transiting Planets Using Purely Empirical Measurements
Stevens, Daniel J.; Gaudi, B. Scott; Johnson, Jennifer A. +4 more
We present analytic estimates of the fractional uncertainties on the mass, radius, surface gravity, and density of a transiting planet, using only empirical or semi-empirical measurements. We first express these parameters in terms of transit photometry and radial velocity (RV) observables, as well as the stellar radius R⋆, if required.…
Jupiter's third largest and longest-lived oval: Color changes and dynamics
Hueso, R.; Sánchez-Lavega, A.; Rojas, J. F. +7 more
The transition region between the North Equatorial Band (NEBn) and North Tropical Zone (NTrZ) in Jupiter is home to convective storms, systems of cyclones and anticyclones and atmospheric waves. Zonal winds are weak but have a strong latitudinal shear allowing the formation of cyclones (typically dark) and anticyclones (typically white) that remai…
The 3D Structure of Saturn Magnetospheric Neutral Tori Produced by the Enceladus Plumes
Richardson, John D.; Smith, Howard Todd
This research provides updated and validated spatial distributions of Enceladus generated H2O, OH, and O neutral tori. These tori are produced by the primary neutral source, Enceladus, and consist of populations of coorbiting neutral particles that provide the bulk of heavy molecules to Saturn's (neutral particle dominant) magnetosphere…
Star Formation Rate Function at z 4.5: An Analysis from Rest UV to Optical
Asada, Yoshihisa; Ohta, Kouji; Maeda, Fumiya
We present a star formation rate function (SFRF) at z ~ 4.5 based on photometric data from the rest UV to optical of galaxies in the CANDELS GOODS-South field using spectral energy distribution (SED) fitting. We evaluate the incompleteness of our sample and correct for it to properly compare the SFRF in this study with those estimated based on oth…
Control of magnetopause flux rope topology by non-local reconnection
Eastwood, Jonathan P.; Mejnertsen, Lars; Chittenden, Jeremy P.
Dayside magnetic reconnection between the interplanetary magnetic field and the Earth's magnetic field is the primary mechanism enabling mass and energy entry into the magnetosphere. During favorable solar wind conditions, multiple reconnection X-lines can form on the dayside magnetopause, potentially forming flux ropes. These flux ropes move tail…