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--> Giclas 29-38 is a variable white dwarf star of the DAV, or ZZ Ceti, whose variability is due to large-amplitude, non-radial pulsations, known as gravity waves. [1]

34 relations: Amplitude, Asteroseismology, Asymptotic giant branch, Benjamin Zuckerman, Brown dwarf, Centre de données astronomiques de Strasbourg, Comet, English language, Epoch (astronomy), Gliese Catalogue of Nearby Stars, Gravity wave, Infrared excess, International Celestial Reference System, Jupiter, Kelvin, NASA, Normal mode, Orbit, Outer planets, Pisces (constellation), Pulsating white dwarf, SIMBAD, Solar radius, Speckle imaging, Spectral density, Spectral density estimation, Spectrum, Spitzer Space Telescope, Star, Star catalogue, Stellar evolution, Variable star, Variable star designation, White dwarf.


The amplitude of a periodic variable is a measure of its change over a single period (such as time or spatial period).

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Asteroseismology (from Greek ἀστήρ, astēr, "star"; σεισμός, seismos, "earthquake"; and -λογία, -logia) also known as stellar seismology is the science that studies the internal structure of pulsating stars by the interpretation of their frequency spectra.

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Asymptotic giant branch

The asymptotic giant branch is the region of the Hertzsprung–Russell diagram populated by evolving low- to medium-mass stars.

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Benjamin Zuckerman

Benjamin Michael Zuckerman (born August 16, 1943) is an astrophysicist and an emeritus professor in the Department of Physics & Astronomy at UCLA.

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Brown dwarf

Brown dwarfs are substellar objects not massive enough to sustain hydrogen-1 fusion reactions in their cores, unlike main-sequence stars.

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Centre de données astronomiques de Strasbourg

The Centre de données astronomiques de Strasbourg (CDS; English translation: Strasbourg Astronomical Data Center) is a data hub which collects and distributes astronomical information.

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A comet is an icy small Solar System body that, when passing close to the Sun, heats up and begins to outgas, displaying a visible atmosphere or coma, and sometimes also a tail.

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English language

English is a West Germanic language that was first spoken in early medieval England and is now a global lingua franca.

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Epoch (astronomy)

In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.

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Gliese Catalogue of Nearby Stars

The Gliese Catalogue of Nearby Stars is a modern star catalogue of stars located within 25 parsecs (81.54 ly) of the Earth.

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Gravity wave

In fluid dynamics, gravity waves are waves generated in a fluid medium or at the interface between two media when the force of gravity or buoyancy tries to restore equilibrium.

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Infrared excess

An infrared excess is a measurement of an astronomical source, typically a star, that in their spectral energy distribution has a greater measured infrared flux than expected by assuming the star is a blackbody radiator.

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International Celestial Reference System

The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU).

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Jupiter is the fifth planet from the Sun and the largest planet in the Solar System.

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The kelvin is a unit of measure for temperature based upon an absolute scale.

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The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as aeronautics and aerospace research.

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Normal mode

A normal mode of an oscillating system is a pattern of motion in which all parts of the system move sinusoidally with the same frequency and with a fixed phase relation.

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In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System.

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Outer planets

The outer planets are those planets in the Solar System beyond the asteroid belt, and hence refers to the gas giants, which are in order of their distance from the Sun.

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Pisces (constellation)

Pisces is a constellation of the zodiac.

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Pulsating white dwarf

A pulsating white dwarf is a white dwarf star whose luminosity varies due to non-radial gravity wave pulsations within itself.

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SIMBAD (the Set of Identifications, Measurements, and Bibliography for Astronomical Data) is an astronomical database of objects beyond the Solar System.

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Solar radius

Solar radius is a unit of distance used to express the size of stars in astronomy equal to the current radius of the Sun: The solar radius is approximately 695,500 kilometres (432,450 miles), which is about 10 times the average radius of Jupiter, 110 times the radius of the Earth, and 1/215th of an astronomical unit, the distance of Earth from the Sun.

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Speckle imaging

Image:Zeta_bootis_short_exposure.png|Typical short-exposure image of a binary star (Zeta Bootis in this case) as seen through atmospheric seeing.

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Spectral density

The power spectrum of a time series x(t) describes how the variance of the data x(t) is distributed over the frequency domain, into spectral components which the series x(t) may be decomposed.

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Spectral density estimation

In statistical signal processing, the goal of spectral density estimation (SDE) is to estimate the spectral density (also known as the power spectral density) of a random signal from a sequence of time samples of the signal.

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A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary infinitely within a continuum.

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Spitzer Space Telescope

The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003.

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A star is a luminous sphere of plasma held together by its own gravity.

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Star catalogue

A star catalogue, or star catalog, is an astronomical catalogue that lists stars.

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Stellar evolution

Stellar evolution is the process by which a star changes during its lifetime.

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Variable star

A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates.

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Variable star designation

Variable stars are designated using a variation on the Bayer designation format of an identifying label (as described below) combined with the Latin genitive of the name of the constellation in which the star lies.

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White dwarf

A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter.

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Redirects here:

G29-38, GJ 895.2, LHS 5405, LTT 16907, NLTT 56992, ZZ Piscium, ZZ Psc.


[1] https://en.wikipedia.org/wiki/G_29-38

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