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- Helioseismology abstract "Helioseismology is the study of the propagation of wave oscillations, particularly acoustic pressure waves, in the Sun. Unlike seismic waves on Earth, solar waves have practically no shear component (s-waves). Solar pressure waves are believed to be generated by the turbulence in the convection zone near the surface of the sun. Certain frequencies are amplified by constructive interference. In other words, the turbulence "rings" the sun like a bell. The acoustic waves are transmitted to the outer photosphere of the sun, which is where the light generated through absorption of radiant energy from nuclear fusion at the centre of the sun, leaves the surface. These oscillations are detectable on almost any time series of solar images, but are best observed by measuring the Doppler shift of photospheric absorption lines. Changes in the propagation of oscillation waves through the Sun reveal inner structures and allow astrophysicists to develop extremely detailed profiles of the interior conditions of the Sun.Helioseismology was able to rule out the possibility that the solar neutrino problem was due to incorrect models of the interior of the Sun. Features revealed by helioseismology include that the outer convective zone and the inner radiative zone rotate at different speeds, which is thought to generate the main magnetic field of the Sun by a dynamo effect, and that the convective zone has "jet streams" of plasma (more precisely, torsional oscillations) thousands of kilometers below the surface. These jet streams form broad fronts at the equator, breaking into smaller cyclonic storms at high latitudes. Torsional oscillations are the time variation in solar differential rotation. They are alternating bands of faster and slower rotation. So far there is no generally accepted theoretical explanation for them, even though a close relation to the solar cycle is evident, as they have a period of eleven years, as was known since they were first observed in 1980.Helioseismology can also be used to image the far side of the Sun from the Earth, including sunspots. In simple terms, sunspots absorb helioseismic waves. This sunspot absorption causes a seismic deficit that can be imaged at the antipode of the sunspot. To facilitate spaceweather forecasting, seismic images of the central portion of the solar far side have been produced nearly continuously since late 2000 by analysing data from the SOHO spacecraft, and since 2001 the entire far side has been imaged with this data.Despite the name, helioseismology is the study of solar waves and not solar seismic activity. The name is derived from the similar practice of studying terrestrial seismic waves to determine the composition of the Earth's interior. The science can be compared to asteroseismology, which studies the propagation of sound waves in stars.".
- Helioseismology thumbnail Helioseismology_pmode1.png?width=300.
- Helioseismology wikiPageExternalLink english.
- Helioseismology wikiPageExternalLink bison.ph.bham.ac.uk.
- Helioseismology wikiPageExternalLink gong.nso.edu.
- Helioseismology wikiPageExternalLink solar.
- Helioseismology wikiPageExternalLink soi.stanford.edu.
- Helioseismology wikiPageExternalLink full_farside.
- Helioseismology wikiPageExternalLink solarphysics.livingreviews.org.
- Helioseismology wikiPageExternalLink lrsp-2005-6.
- Helioseismology wikiPageExternalLink open?pubNo=lrsp-2005-1.
- Helioseismology wikiPageExternalLink trace.
- Helioseismology wikiPageExternalLink www.helas-eu.org.
- Helioseismology wikiPageExternalLink virgo.
- Helioseismology wikiPageExternalLink lrsp-2005-6.
- Helioseismology wikiPageExternalLink news_summ.jsp?cntn_id=105844&org=olpa&from=news.
- Helioseismology wikiPageID "408801".
- Helioseismology wikiPageRevisionID "600533443".
- Helioseismology hasPhotoCollection Helioseismology.
- Helioseismology subject Category:Fields_of_seismology.
- Helioseismology subject Category:Stellar_phenomena.
- Helioseismology subject Category:Sun.
- Helioseismology type Field108569998.
- Helioseismology type FieldsOfSeismology.
- Helioseismology type GeographicalArea108574314.
- Helioseismology type Location100027167.
- Helioseismology type Object100002684.
- Helioseismology type PhysicalEntity100001930.
- Helioseismology type Region108630985.
- Helioseismology type Tract108673395.
- Helioseismology type YagoGeoEntity.
- Helioseismology type YagoLegalActorGeo.
- Helioseismology type YagoPermanentlyLocatedEntity.
- Helioseismology comment "Helioseismology is the study of the propagation of wave oscillations, particularly acoustic pressure waves, in the Sun. Unlike seismic waves on Earth, solar waves have practically no shear component (s-waves). Solar pressure waves are believed to be generated by the turbulence in the convection zone near the surface of the sun. Certain frequencies are amplified by constructive interference. In other words, the turbulence "rings" the sun like a bell.".
- Helioseismology label "Eliosismologia".
- Helioseismology label "Helioseismologie".
- Helioseismology label "Helioseismologie".
- Helioseismology label "Helioseismology".
- Helioseismology label "Heliosejsmologia".
- Helioseismology label "Heliosismologia".
- Helioseismology label "Heliosismología".
- Helioseismology label "Héliosismologie".
- Helioseismology label "日震".
- Helioseismology label "日震学".
- Helioseismology sameAs Helioseismologie.
- Helioseismology sameAs Ηλιοσεισμολογία.
- Helioseismology sameAs Heliosismología.
- Helioseismology sameAs Héliosismologie.
- Helioseismology sameAs Eliosismologia.
- Helioseismology sameAs 日震学.
- Helioseismology sameAs 일진학.
- Helioseismology sameAs Helioseismologie.
- Helioseismology sameAs Heliosejsmologia.
- Helioseismology sameAs Heliosismologia.
- Helioseismology sameAs m.024t5r.
- Helioseismology sameAs Q1068381.
- Helioseismology sameAs Q1068381.
- Helioseismology sameAs Helioseismology.
- Helioseismology wasDerivedFrom Helioseismology?oldid=600533443.
- Helioseismology depiction Helioseismology_pmode1.png.
- Helioseismology isPrimaryTopicOf Helioseismology.