Search Publications
Missions
Journals
Publication Years
Initial Evaluation of SNEMO2 and SNEMO7 Standardization Derived from Current Light Curves of Type Ia Supernovae
Galbany, L.; Sako, M.; Rubin, D. +7 more
To determine if the SuperNova Empirical Model (SNEMO) can improve Type Ia supernova (SN Ia) standardization of several currently available photometric data sets, we perform an initial test, comparing results with the much-used SALT2 approach. We fit the SNEMO light-curve parameters and pass them to the Bayesian hierarchical model UNITY1.2 to estim…
Long-term Photometry and Orbital Period Change of the W UMa-type Binary v0599 Aur: Evidence of about 11 yr Magnetic-activity Cycle
Yu, Yun-Xia; Hu, Ke; Xiang, Fu-Yuan +1 more
Combining all available photometric data from various surveys and literature with our observations, we present 10 sets of light curves for the eclipsing binary V0599 Aur covering a timescale of 20 yr. During the last two decades, the O'Connell effect continuously varied and went through at least two flips between positive and negative effects. The…
Interstellar anatomy of the TeV gamma-ray peak in the IC443 supernova remnant
Marcowith, A.; Gerin, M.; Güsten, R. +11 more
Context. Supernova remnants (SNRs) represent a major feedback source from stars in the interstellar medium of galaxies. During the latest stage of supernova explosions, shock waves produced by the initial blast modify the chemistry of gas and dust, inject kinetic energy into the surroundings, and may alter star formation characteristics. Simultane…
Non-local thermodynamic equilibrium transmission spectrum modelling of HD 209458b
Salz, M.; France, K.; Fossati, L. +3 more
Context. Exoplanetary upper atmospheres are low density environments where radiative processes can compete with collisional ones and introduce non-local thermodynamic equilibrium (NLTE) effects into transmission spectra.
Aims: We develop a NLTE radiative transfer framework capable of modelling exoplanetary transmission spectra over a wide ran…
New Homogeneous Dataset of Solar EUV Synoptic Maps from SOHO/EIT and SDO/AIA
Asikainen, T.; Mursula, K.; Hamada, A.
Synoptic maps of solar EUV intensities have been constructed for many decades in order to display the distribution of the different EUV emissions across the solar surface, with each map representing one Carrington rotation (i.e. one rotation of the Sun). This article presents a new solar EUV synoptic map dataset based on full-disk images from the …
Insights into the Formation and Evolution History of the Galactic Disk System
Beers, Timothy C.; Lee, Young Sun; Kim, Young Kwang +1 more
We present a kinematic analysis of a sample of 23,908 G- and K-type dwarfs in the Galactic disk. Based on the α-abundance ratio, [α/Fe], we separated our sample into low-α thin-disk and high-α thick-disk stars. We find a ${V}_{\phi }$ gradient of -28.2 km s-1 dex-1 over [Fe/H] for the thin disk and an almost flat trend of the…
2016 Outburst of H 1743-322: XMM-Newton and NuSTAR View
Dewangan, G. C.; Chand, Swadesh; Tripathi, Prakash +2 more
We report the detection of a type C quasi-periodic oscillation (QPO) along with an upper harmonic in the commensurate ratio of 1:2 in two observations of the low-mass black hole transient H 1743-322 jointly observed by XMM-Newton and NuSTAR during the 2016 outburst. We find that the QPO and the upper harmonic exhibit shifts in their centroid frequ…
Trigonometric parallax of O-rich Mira variable star OZ Gem (IRAS 07308+3037): A confirmation of the difference between the P-L relations of the Large Magellanic Cloud and the Milky Way
Kawabata, Koji; Fujimoto, Masayuki Y.; Yamanaka, Masayuki +11 more
OZ Geminorum (OZ Gem) is a galactic Mira variable in the Milky Way (MW). We measured its annual parallax with VLBI Exploration of Radio Astrometry to be π = 0.806 ± 0.039 mas, corresponding to a distance of D = 1.24 ± 0.06 kpc. Based on multi-epoch infrared observations with the Kagoshima University 1 m telescope, we also derived the mean J-, H-, …
Electron acceleration and radio emission following the early interaction of two coronal mass ejections
Palmerio, E.; Magdalenić, J.; Kilpua, E. K. J. +6 more
Context. Coronal mass ejections (CMEs) are large eruptions of magnetised plasma from the Sun that are often accompanied by solar radio bursts produced by accelerated electrons.
Aims: A powerful source for accelerating electron beams are CME-driven shocks, however, there are other mechanisms capable of accelerating electrons during a CME erupt…
A resistive extension for ideal magnetohydrodynamics
Wright, Alex James; Hawke, Ian
We present an extension to the special relativistic, ideal magnetohydrodynamic (MHD) equations, designed to capture effects due to resistivity. The extension takes the simple form of an additional source term that, when implemented numerically, is shown to emulate the behaviour produced by a fully resistive MHD description for a range of initial d…