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Category/Subcategory: Natural Sciences/Astronomy

SIGS - Seismic Inferences for Glitches in Stars

Author: Filipe Pereira
A new set of codes, to become publicly available, are presented. These use the frequencies of oscillation of solar-type stars, together with some of the stellar atmospheric parameters, to automatically measure and characterize aco ... more

Views: 358

Measurements of the Absorption and Scattering Cross Sections for the Interactions of Solar Acoustic Waves with Sunspots

Author: Hui Zhao
The solar acoustic waves are modified by the interaction with sunspots. The interaction can be treated as a scattering problem: an incident wave propagating toward a sunspot is scattered by the sunspot into different modes. Th ... more

Views: 325

The first quintuple system found with the K2 Mission

Author: Holger Lehmann
There were some 3000 binaries discovered in the Kepler main mission, and there is a growing collection of binaries that have been found to date in the 2-wheel extension of the Kepler mission, called ‘K2’. Among this impressive ... more

Views: 374

Starspot signature on the light curve: learning about the spot distribution

Author: Ângela R. G. Santos
Starspots are cooler/darker than the stellar surface. Therefore, the total flux of a star changes when spots are visible on its surface. The presence of spots together with the stellar rotation leads to a periodic modulation on th ... more

Views: 281

Suppression of kinematic dynamo by shear flow

Author: Aditi Sood
Magnetic fields and shear flows play an important role in many systems including astrophysical, geophysical and laboratory plasmas. We report how the growth of magnetic fields is modified by large-scale shear flow by investiga ... more

Views: 401

Seismic Inference of 58 Stars using full-length Kepler data sets

Author: Orlagh Creevey
We present stellar properties of 58 stars from a seismic inference using full-length data sets from Kepler (mass, age, radius, distances). These stars comprise active stars, planet-hosts, solar-analogs, and binary systems. By empl ... more

Views: 329

Solar Physics Research Integrated Network Group (SPRING) : A Next Generation Ground-based Synoptic Network

Author: Sanjay gosain
SPRING is an evolving concept for next generation solar synoptic observations network. It is envisaged that the new network will cater to the needs of (i) Helioseismology community, by providing improved resolution Doppler observa ... more

Views: 579

Observations of Red Giants with SONG

Author: Pere L. Pallé
One of the outstanding and unforeseen results from the Kepler mission is our new insight and understanding of red giant stars. These highly evolved stars, which are in the last stages of their life, provide extremely useful inform ... more

Views: 398

Toward a better understanding of red giants rotation

Author: Charlotte Gehan
Red giant stars have proved to be asteroseismic targets of choice: conditions in their interior are met to couple pressure waves propagating in the envelope and gravity waves propagating in the core, so that we have a direct view ... more

Views: 304

Photosphere and chromosphere telescope at Hvar Observatory

Author: Jaša Čalogović
The double solar telescope at the Hvar Observatory consists of two Carl Zeiss refractors, attached as one unit on a German parallax mounting. The photosphere telescope has an objective diameter of 217 mm and the chromosphere teles ... more

Views: 370