some observations on the white light solar faculae. - nasa/ads

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# some observations on the white light solar faculae. - nasa/ads

## SPECTRAL AND IMAGING OBSERVATIONS OF A WHITE-LIGHT SOLAR …

Mar 07, 2016· The flare we report, SOL2014-10-24 (C7.0), also produced white-light emission detected by the Helioseismic and Magnetic Imager (Scherrer et al. 2012) on the Solar Dynamics Observatory spacecraft, and there is complete coverage in the hard X-ray range by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI; Lin et al. 2002).

## Refereed RHESSI Publications - NASA

NASA ADS search in title, abstract, and text for keywords HESSI or RHESSI ... Bridging EUV and White-Light Observations to Inspect the Initiation Phase of a "Two-Stage" Solar Eruptive Event ... The Use of Electron Maps to Constrain Some Physical Properties of Solar Flares 2013SoPh..283..177M 2 citations; McAteer, R. T. J., & Bloomfield, D. S ...

## Long-term relationships between sunspots, solar faculae ...

Oct 01, 1981· The Greenwich photospheric faculae are restricted to heliographic longitudes greater than 50(FOUKAL and VERNAZZA, 1979) because, at smaller longitudes, the white-light faculae are undetectable against the bright- ness of the central solar disc. The Greenwich measure- ments thus relate only to about 44% of the visible hemisphere.

## Solar Variability and the Relation of Facular to Sunspot ...

In this paper, faculae are determined by observations using a filter centered at the Ca II K line (393.4 nm) with a bandpass of 0.9 nm. This filter allows the detection of faculae across the entire solar disk rather than just at the limb, as is the case for white-light faculae. Sunspots are detected with a filter at 672.3 nm with a bandpass of ...

## [1801.01716v1] Spatial Inhomogeneity In Solar Faculae

Jan 05, 2018· In this paper, we investigate the inhomogeneous spatial distribution of solar faculae. The focus is on the latitudinal and longitudinal distributions of these highly localised features covering ubiquitously the solar surface. The statistical analysis is based on white light observations of the Solar and Heliospheric Observatory (SOHO) and Solar Dynamics Observatory (SDO) between 1996 and …

## Proceedings of the International Astronomical Union ...

The statistical analysis is based on white light observations of the Solar and Heliospheric Observatory (SOHO) and Solar Dynamics Observatory (SDO) between 1996 and 2014. We found that the fine structure of the latitudinal distribution of faculae displays a quasi-biennial oscillatory pattern.

## ia601609.us.archive.org

Most stars are boring. Advances come from studying the weirdies — the quasars, the pulsars, the gravitational lenses — that don’ t seem to fit into the models that you’ ve grown up with. Knowing cratering statistics on the planet Mercury tells you how often the planet was bombarded in the early solar …

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## Radiation in the form of heat and light provides almost ...

the coming and going of sunspots and faculae on its white-light surface; that the outer layers of the solar atmosphere—the chromosphere and corona—are even more dynamic and variable; and that solar explosions and eruptions are everyday occurrences on the star. But to what extent do these transient features alter the

## Polar Faculae: 1906--1990 - NASA/ADS

Jun 01, 1991· Polar Faculae: 1906--1990 Sheeley, N. R., Jr. The numbers of faculae at the sun's poles have been estimated from white-light images obtained at the Mount Wilson Observatory during 1970-1990 and have been combined with previous measurements extending back to 1906 when the observations began.

## Solar Observing: Solar Books - Peter Meadows

The next two chapters describe observations of white light flares, differential rotation, the latitude distribution of sunspots throughout a solar cycle (the Butterfly diagram) and the Zeeman effect in sunspots. These all furthered our understanding of the Sun and finally linked solar activity with terrestrial magnetic effects such as Solar.

## Solar Observations, Delaney, Susan -

She uses a telescope fitted with a Baader white-light solar filter to safely observe the active regions and sunspots on the Sun's photosphere. Solar features documented include sunspot groups, umbrae, penumbrae and faculae. This book is a compilation of the author's solar observations …

## Importance of improved facular observations in ...

OSTI.GOV Journal Article: Importance of improved facular observations in understanding solar constant variations

## Symposium - International Astronomical Union: Volume 154 ...

Cambridge Core - Symposium - International Astronomical Union - Volume 154 -

## White-Light Solar Flare Recorded from Spain in 1886 - …

Oct 19, 2017· White-Light Solar Flare Recorded from Spain in 1886. Satellites have detected powerful solar flares in the last two months, but this phenomenon has been recorded for over a …

## Applying an Automatic Image-Processing Method to …

Oct 03, 2013· The strongest contrast of faculae in white light is observed near the solar limb. The given parameters of the automatic detection method allows plages to be located in a distance range of 0.3

## Solar Irradiance Variability: Comparisons of Models and ...

Nov 08, 2019· The proxy of sunspot darkening is derived from direct, daily observations of the number of sunspots and areas on white-light images of the solar disk by ground-based observatories; the heliocentric locations are used to account for variations in sunspot contrast as a function of limb position (e.g., Lean et al. ). For the Solar Irradiance CDR ...

## Solar Observations eBook: Delaney, Susan: .au ...

She uses a telescope fitted with a Baader white-light solar filter to safely observe the active regions and sunspots on the Sun's photosphere. Solar features documented include sunspot groups, umbrae, penumbrae and faculae. This book is a compilation of the author's solar observations …

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## What’s So Peculiar about the Cycle 23/24 Solar …

ﬁeld measurements. Polar faculae are visible on white-light images obtained daily at the Mount Wilson Observatory since 1906, and their numbers provide a reliable indication of the polar magnetic ﬁeld strengths. Figure 7 shows the numbers of polar faculae counted during the favorable intervals of each year (fall or spring) since 1906.

## Prediction of the strength and timing of sunspot cycle 25 ...

Dec 06, 2018· In this light, our simulations and its agreement with century-scale solar activity observations strongly suggests that while a source of weak magnetic fields in the solar …

## Proceedings of the International Astronomical Union ...

Cambridge Core - Proceedings of the International Astronomical Union - Volume 6 - The Physics of Sun and Star Spots

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## (SOUP) - NASA

Historic solar observations were made with the Solar Optical Universal Polarimeter (SO UP) instrument which flew on the shuttle Spacelab 2 mission in August, 1985. SOUP is the only solar telescope either in space or on a balloon that has delivered long sequences …

## ia601609.us.archive.org

Most stars are boring. Advances come from studying the weirdies — the quasars, the pulsars, the gravitational lenses — that don’ t seem to fit into the models that you’ ve grown up with. Knowing cratering statistics on the planet Mercury tells you how often the planet was bombarded in the early solar …

## SDO | Solar Dynamics Observatory

(2019) Direct Estimates Of The Solar Coronal Magnetic Field Using Contemporaneous Extreme-ultraviolet, Radio, And White-light Observations. Astrophysical Journal. vol 881. pp 24. doi 10.3847/1538-4357/ab2adf

## The LASCO Coronal Brightness Index | SpringerLink

Feb 05, 2020· The Large Angle Spectrometric Coronagraph (LASCO) telescope on board the joint ESA/NASA Solar and Heliospheric Observatory (SOHO) mission has been operating almost continuously for over 23 years, returning white-light observations of the solar corona from 2.5 – 30 $$\mathrm{R}_{\odot}$$.The continuity and stability of this instrument, coupled with its precise …

## Geosciences | Free Full-Text | Physics of Space Weather ...

The Sun, a G-type main sequence star [] and a crucial source of energy for all living systems on the Earth, is the epicentre for variable space weather conditions.The major constituents of the Sun are hydrogen (~73%) and helium (~25%), with some other elements such as iron, carbon, neon and oxygen, etc. contributing by ~2% [].The Sun’s activity, which is measured by intensities of ...

## 1978JBAA...88..444W Page 444

SAO/NASA Astrophysics Data System (ADS) Title: Some observations on the white light solar faculae Authors: Wadsworth, D. J. Journal: British Astronomical Association ...

## Solar Irradiance - an overview | ScienceDirect Topics

Most of the TSI variance displayed in Fig. 6, within any given experiment, arises not from errors but rather from true solar variability imposed by dark sunspots (−0.1%) and bright faculae (+0.1%).These features are seen on the solar disk in Fig. 7.Both sunspots and faculae are magnetic features; thus, the magnetic activity cycle is revealed.