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Topic: Faculae

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In the News (Sat 25 May 19)

  Faculae   (Site not responding. Last check: 2007-11-02)
Faculae are bright granular structures on the Sun's surface that are slightly hotter than the surrounding photosphere.
Faculae are visible in ordinary white light near the Sun's limb (apparent edge), where the photospheric background is dimmer than near the centre of the disk.
The extensions of faculae up into the chromosphere become visible over the entire disk in spectroheliograms taken at the wavelengths of hydrogen or ionized calcium vapour.
abyss.uoregon.edu /~js/glossary/faculae.html   (98 words)

 Solar faculae explained
Faculae were shown to be associated with strong magnetic fields nearly 40 years ago and a plausible physical explanation for them was proposed by Spruit already in his 1976 and 1977 papers.
Interest in faculae increased with the discovery that the total solar irradiance increases when the sun is more active, which may be contrary to expectations since high activity also means more dark sunspots.
Sunspots and faculae modulate the total solar energy output and they are thus relevant for studies of climate change.
www.solarphysics.kva.se /highlights/faculae-explained   (829 words)

 SPACE.com -- New 3-D Pictures of the Sun
Granulation, sunspots, and faculae are visible in this 3-D image of a solar active region taken on July 24 near the eastern limb of the Sun.
Scientists suspect the bright faculae near the limb of the Sun to be the source.
Simultaneous measurements of the magnetic field establish that the bright faculae are exactly aligned with the magnetic fields, researchers said.
www.space.com /scienceastronomy/3d_sun_030618.html   (596 words)

 NASA/Marshall Solar Physics
Faculae are bright areas that are usually most easily seen near the limb, or edge, of the solar disk.
These are also magnetic areas but the magnetic field is concentrated in much smaller bundles than in sunspots.
During a sunspot cycle the faculae actually win out over the sunspots and make the Sun appear slightly (about 0.1%) brighter at sunspot maximum that at sunspot minimum.
solarscience.msfc.nasa.gov /feature1.shtml   (460 words)

 NGDC/WDC STP, Boulder, White Light Faculae Data via FTP from NGDC
Solar White Light Faculae are areas of bright plages on the solar disk.
These were routinely measured at the Royal Greenwich Observatory in the UK from 1874 to 1976, producing a record of over 100 years of continuous monitoring of this solar phenomenon.
The record includes the time when the photograph was taken, the station observing (includes Greenwich, Cape of Good Hope, Kodaikanal, and Mauritius), a group number, the position of the spot group and/or faculae, the area of the spots, and the faculae area for each group.
www.ngdc.noaa.gov /stp/SOLAR/ftpwhitelightfaculae.html   (453 words)

 SVS Animation 2644 - The Solar 'Constant' - Faculae vs. Sunspots
SVS Animation 2644 - The Solar 'Constant' - Faculae vs. Sunspots
The color table has been altered to enhance the appearance of the faculae (white regions) which are hotter than sunspots (red-fl regions) and whose greater total area contribute to increasing the solar flux reaching the Earth.
HAO is a division of the National Center for Atmospheric Research which is supported by the National Science Foundation.Special thanks to Vanessa George (University of Colorado/LASP) and Randy Meisner(Michigan State University)
svs.gsfc.nasa.gov /vis/a000000/a002600/a002644/index.html   (111 words)

 Observing Our Closest Star The Sun
Most telescopes have the option of purchasing a matching solar filter special designed to fit the telescope.
With a solar filter you can see detail in sunspots, bright faculae near the limb and the mottled areas known as granules with these filters.
The Sun offers constant changes and will keep your observing interesting and fun.
telescopes.com /faq/Observing-Our-Closest-Star-The-Sun.html   (453 words)

  Encyclopedia of Astronomy and Astrophysics » Browse by subject   (Site not responding. Last check: 2007-11-02)
The solar wind forms a bubble, called the heliosphere, in the local interstellar medium (LISM), within which the solar system …
A localized region of the Sun's surface and atmosphere that displays most or all of the following phenomena: sunspots, faculae, …
The anomalous cosmic rays are an ionic component of the cosmic-ray flux which is observed, in the heliosphere, to be …
eaa.iop.org /index.cfm?action=browse.home&type=cl&dir=Sun&node=clSun   (424 words)

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