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We present revised point-spread functions (PSFs) for the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). These PSFs provide a robust estimate of the light diffracted by the meshes holding the entrance and…

Solar and Stellar Astrophysics · Physics 2025-02-26 Stefan Hofmeister , Daniel Wolf Savin , Michael Hahn

We provide a large image parameter dataset extracted from the Solar Dynamics Observatory (SDO) mission's AIA instrument, for the period of January 2011 through the current date, with the cadence of six minutes, for nine wavelength channels.…

Solar and Stellar Astrophysics · Physics 2019-07-31 Azim Ahmadzadeh , Dustin J. Kempton , Rafal A. Angryk

The 3D fine structure of the solar atmosphere is still not fully understood as most of the available observations are taken from a single vantage point. The goal of the paper is to study the 3D distribution of small-scale brightening events…

The search for minor bodies in the solar system promises insights into its formation history. Wide imaging surveys offer the opportunity to serendipitously discover and identify these traces of planetary formation and evolution. We aim to…

Instrumentation and Methods for Astrophysics · Physics 2018-02-21 M. Mahlke , H. Bouy , B. Altieri , G. Verdoes Kleijn , B. Carry , E. Bertin , J. T. A. de Jong , K. Kuijken , J. McFarland , E. Valentijn

We present a dataset for investigating the impact of stellar activity on astrometric measurements using NASA's Solar Dynamics Observatory (SDO) images of the Sun. The sensitivity of astrometry for detecting exoplanets is limited by stellar…

Solar and Stellar Astrophysics · Physics 2023-10-20 Warit Wijitworasart , Zoe de Beurs , Andrew Vanderburg

A reasonable basis for future astronomical investigations of exoplanets lies in our best knowledge of the planets and satellites in the Solar System. Solar System bodies exhibit a wide variety of surface environments, even including…

Earth and Planetary Astrophysics · Physics 2015-06-22 Yuka Fujii , Jun Kimura , James Dohm , Makiko Ohtake

The variation of solar irradiance is one of the natural forcing mechanisms of the terrestrial climate. Hence, the time-dependent solar irradiance is an important input parameter for climate modelling. The solar surface magnetic field is a…

Solar and Stellar Astrophysics · Physics 2015-05-11 Omar Ashamari , Rami Qahwaji , Stan Ipson , Micha Scholl , Omar Nibouche , Margit Haberreiter

The Helioseismic and Magnetic Imager onboard the Solar Dynamics Observatory (SDO/HMI) provides continuous full-disk observations of solar oscillations. We develop a data-analysis pipeline based on the time-distance helioseismology method to…

Solar and Stellar Astrophysics · Physics 2015-05-27 J. Zhao , S. Couvidat , R. S. Bogart , K. V. Parchevsky , A. C. Birch , T. L. Duvall , J. G. Beck , A. G. Kosovichev , P. H. Scherrer

Numerical investigation of the interaction of electromagnetic fields with eukaryotic cells requires specifically adapted computer models. Virtual microdosimetry, used to investigate exposure, requires volumetric cell models, which are…

We used a series of COBOLD hydrodynamical model atmospheres covering stellar objects from white dwarfs to red giants to derive theoretical estimates of the photometric and photocentric stellar variability in wavelength-integrated light…

Astrophysics · Physics 2007-05-23 F. Svensson , H. -G. Ludwig

Solar supergranulation remains a mystery in spite of decades of intensive studies. Most of the papers about supergranulation deal with its surface properties. Local helioseismology provides an opportunity to look below the surface and see…

Solar and Stellar Astrophysics · Physics 2015-05-19 Radek Zlebcik , Michal Svanda , Mirek Klvana

Magnetoconvection at the solar surface governs the dynamics in the upper solar atmosphere and sustains the heliosphere. Properties of this fundamental process are poorly described near the solar poles. Here we report the first…

This paper describes the Polarimetric and Helioseismic Imager on the Solar Orbiter mission (SO/PHI), the first magnetograph and helioseismology instrument to observe the Sun from outside the Sun-Earth line. It is the key instrument meant to…

Instrumentation and Methods for Astrophysics · Physics 2020-09-30 S. K. Solanki , J. C. del Toro Iniesta , J. Woch , A. Gandorfer , J. Hirzberger , A. Alvarez-Herrero , T. Appourchaux , V. Martínez Pillet , I. Pérez-Grande , E. Sanchis Kilders , W. Schmidt , J. M. Gómez Cama , H. Michalik , W. Deutsch , G. Fernandez-Rico , B. Grauf , L. Gizon , K. Heerlein , M. Kolleck , A. Lagg , R. Meller , R. Müller , U. Schühle , J. Staub , K. Albert , M. Alvarez Copano , U. Beckmann , J. Bischoff , D. Busse , R. Enge , S. Frahm , D. Germerott , L. Guerrero , B. Löptien , T. Meierdierks , D. Oberdorfer , I. Papagiannaki , S. Ramanath , J. Schou , S. Werner , D. Yang , A. Zerr , M. Bergmann , J. Bochmann , J. Heinrichs , S. Meyer , M. Monecke , M. -F. Müller , M. Sperling , D. Álvarez Garcí a , B. Aparicio , M. Balaguer Jiménez , L. R. Bellot Rubio , J. P. Cobos Carracosa , F. Girela , D. Hernández Expósito , M. Herranz , P. Labrousse , A. López Jiménez , D. Orozco Suárez , J. L. Ramos , J. Barandiarán , L. Bastide , C. Campuzano , M. Cebollero , B. Dávila , A. Fernández-Medina , P. García Parejo , D. Garranzo-García , H. Laguna , J. A. Martín , R. Navarro , A. Núñez Peral , M. Royo , A. Sánchez , M. Silva-López , I. Vera , J. Villanueva , J. -J. Fourmond , C. Ruiz de Galarreta , M. Bouzit , V. Hervier , J. C. Le Clec'h , N. Szwec , M. Chaigneau , V. Buttice , C. Dominguez-Tagle , A. Philippon , P. Boumier , R. Le Cocguen , G. Baranjuk , A. Bell , Th. Berkefeld , J. Baumgartner , F. Heidecke , T. Maue , E. Nakai , T. Scheiffelen , M. Sigwarth , D. Soltau , R. Volkmer , J. Blanco Rodríguez , V. Domingo , A. Ferreres Sabater , J. L. Gasent Blesa , P. Rodríguez Martínez , D. Osorno Caudel , J. Bosch , A. Casas , M. Carmona , A. Herms , D. Roma , G. Alonso , A. G\' omez-Sanjuan , J. Piqueras , I. Torralbo , B. Fiethe , Y. Guan , T. Lange , H. Michel , J. A. Bonet , S. Fahmy , D. Müller , I. Zouganelis

A spatial stochastic model is developed which describes the 3D nanomorphology of composite materials, being blends of two different (organic and inorganic) solid phases. Such materials are used, for example, in photoactive layers of hybrid…

We present a comparative seismic study of conditions around and beneath isolated sunspots. Using the European Grid of Solar Observations' Solar Feature Catalogue of sunspots derived from SOHO/MDI continuum and magnetogram data, 1996-2005,…

Astrophysics · Physics 2009-11-13 S. Zharkov , C. Nicholas , M. J. Thompson

We tested whether simultaneous spectropolarimetric imaging in two magnetically sensitive optical spectral lines, which probe two different layers of the solar atmosphere (the photosphere and the temperature minimum), can help constrain the…

We use extensive gravity-sensitive DDO 51 photometry over 5100 square degrees, combined with SDSS broadband photometry, to select a catalog of $\sim 4,000$ giant stars covering a large fraction of the high Galactic latitude sky and reaching…

Astrophysics of Galaxies · Physics 2016-12-14 Colin T. Slater , David L. Nidever , Jeffrey A. Munn , Eric F. Bell , Steven R. Majewski

Context. High-resolution observations of the solar photosphere reveal the presence of fine structures, in particular the so-called magnetic bright points (MBPs), which are small-scale features associated with strong magnetic field regions…

Nanoflares in quiet-Sun regions during solar cycle 24 are studied with the best available plasma diagnostics to derive their energy distribution and contribution to coronal heating during different levels of solar activity. Extreme…

Solar and Stellar Astrophysics · Physics 2022-05-25 Stefan Purkhart , Astrid M. Veronig

The distribution of magnetic field strength at different levels in the solar photosphere outside active regions was obtained on the basis of the 2D MHD simulation of magnetogranulation and the synthesis of the V profiles of the Fe I 1564.8…

Solar and Stellar Astrophysics · Physics 2012-09-28 V. A. Sheminova
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