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Convective envelopes in stars on the main sequence are usually connected only with stars of spectral types F5 or later. However, observations as well as theory indicate that the convective outer layers in earlier stars, despite being…

Solar and Stellar Astrophysics · Physics 2016-03-23 Victoria Antoci

The tidally tilted pulsators are a new type of oscillating star in close binary systems that have their pulsation axis in the orbital plane because of the tidal distortion caused by their companion. We describe this group of stars on the…

Solar and Stellar Astrophysics · Physics 2022-05-19 Gerald Handler , Rahul Jayaraman , Donald W. Kurtz , Jim Fuller , Saul A. Rappaport

Quasi-periodic oscillations have been seen in the light curves following several magnetar giant flares. These oscillations are of great interest as they probably provide our first ever view of the normal modes of oscillation of neutron…

Solar and Stellar Astrophysics · Physics 2015-06-16 K. Glampedakis , D. I. Jones

The disciplines of asteroseismology and extrasolar planet science overlap methodically in the branch of high-precision photometric time series observations. Light curves are, amongst others, useful to measure intrinsic stellar variability…

Solar and Stellar Astrophysics · Physics 2010-05-20 Sonja Schuh

Excitation of solar oscillations is attribued to turbulent motions in the solar convective zone. It is also currently believed that oscillations of low massive stars (M <2 Mo) - which possess an upper convective zone - are stochastically…

Astrophysics · Physics 2007-05-23 Reza Samadi

In the course of their evolution, white-dwarf stars go through at least one phase of variability in which the global pulsations they undergo allow astronomers to peer into their interiors, this way making possible to shed light on their…

Solar and Stellar Astrophysics · Physics 2020-06-11 Alejandro H. Córsico

Rapidly oscillating Ap stars consitute a unique class of pulsators to study nonradial oscillations under some - even for stars - unusual physical conditions. These stars are chemically peculiar, they have strong magnetic fields, and they…

Astrophysics · Physics 2009-10-30 Alfred Gautschy , Hideyuki Saio , Housi Harzenmoser

We review the present-day methods of mode identification applied to main sequence pulsators focusing on those that make use of multicolour photometry and radial velocity data. The effects which may affect diagnostic properties of these…

Solar and Stellar Astrophysics · Physics 2011-12-13 J. Daszyńska-Daszkiewicz , A. A. Pamyatnykh

Neutron stars are fascinating astrophysical objects immersed in strong gravitational and electromagnetic fields, at the edge of our current theories. These stars manifest themselves mostly as pulsars, emitting a timely very stable and…

High Energy Astrophysical Phenomena · Physics 2016-09-28 J. Pétri

The unparalleled photometric data obtained by NASA's Kepler Space Telescope has led to improved understanding of red-giant stars and binary stars. We discuss the characterization of known eccentric system, containing a solar-like…

Solar and Stellar Astrophysics · Physics 2015-11-23 P. G. Beck , K. Hambleton , J. Vos , T. Kallinger , R. A. Garcia , S. Mathur , K. Houmani

Despite more and more observational data, stellar acoustic oscillation modes are not well understood as soon as rotation cannot be treated perturbatively. In a way similar to semiclassical theory in quantum physics, we use acoustic ray…

Solar and Stellar Astrophysics · Physics 2011-09-16 M. Pasek , B. Georgeot , F. Lignieres , D. R. Reese

In this short review on stellar convection dynamics I address the following, currently very topical, issues: (1) the surface effects of the Reynolds stresses and nonadiabaticity on solar-like pulsation frequencies, and (2) oscillation mode…

Solar and Stellar Astrophysics · Physics 2015-05-19 G. Houdek

The history of stellar seismology suggests that observation and theory often take turns advancing our understanding. The recent tripling of the sample of pulsating white dwarfs generated by the Sloan Digital Sky Survey represents a giant…

Astrophysics · Physics 2009-11-11 Travis S. Metcalfe

We review methodologies currently available to interprete time series of high-resolution high-S/N spectroscopic data of pulsating stars in terms of the kind of (non-radial) modes that are excited. We illustrate the drastic improvement of…

Astrophysics · Physics 2009-11-13 C. Aerts , S. Hekker , M. Desmet , F. Carrier , W. Zima , M. Briquet , J. De Ridder

Advances in stellar interior modeling are being driven by new data from large-scale surveys and high-precision photometric and spectroscopic observations. Here we focus on single stars in normal evolutionary phases; we will not discuss the…

Solar and Stellar Astrophysics · Physics 2015-05-19 Joyce Ann Guzik

Neutron stars involve extreme physics which is difficult (perhaps impossible) to explore in laboratory experiments. We have to turn to astrophysical observations, and try to extract information from the entire range of the electromagnetic…

High Energy Astrophysical Phenomena · Physics 2017-09-22 N. Andersson

I review the properties of pulsators located on the upper main sequence in the HR diagram and discuss asteroseismic inferences on the internal structure of stars of spectral type A and B. Special attention is given to the problem of…

Solar and Stellar Astrophysics · Physics 2012-06-12 P. Lenz

One of the great quests of astronomy is to obtain the spectrum of a terrestrial planet orbiting within the habitable zone of its star, and the dominant challenge in doing so is to isolate the light of the planet from that of the star.…

Astrophysics · Physics 2007-06-08 David Charbonneau , Drake Deming

The fundamental properties of detached eclipsing binary stars can be measured very accurately, which could make them important objects for constraining the treatment of convection in theoretical stellar models. However, only four or five…

Astrophysics · Physics 2009-11-11 John Southworth , Hans Bruntt

Pulsars are potentially the most remarkable physical laboratories we will ever use. Although in many senses they are extremely clean systems there are a large number of instabilities and variabilities seen in the emission and rotation of…

Solar and Stellar Astrophysics · Physics 2015-06-11 E. F. Keane