Near IR variability of the quiet Sun

Markov, M. N.; Volynov, B. V.; Zholobov, V. M.; Gorbatko, V. V.; Glazkov, Ju. N.; Petrov, V. S.; Ivanov, Ju. S.; Dombrovsky, N. O.

doi:10.1038/281463a0

Search citation statements

Order By: Relevance

Paper Sections

Select...

M)1

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1981

Publication Types

Select...

Article1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As the model by Parker (1979a) implies a depth dependent umbral dot structure, a comparison of our intensity observations and a 2-component depth dependent model calculation may be of interst. Markov et al (1979), have observed short-period variations in the radiative flux from the quiet Sun, at wavelengths between 4.05 and 5.25 txm. They attributed this variation to a complete disappearance and reformation of CO molecules.…”

Section: M)mentioning

confidence: 99%

Solar cycle variation of sunspot intensity

Albregtsen

Maltby

1981

Sol Phys

View full text Add to dashboard Cite

Broad band pinhole photometer intensity observations of 15 large sunspots covering the spectral region 0.387-2.35 p.m are presented. The data are based on measurements on approximately 500 days during the period June, 1967 to December, 1979.We have found real and significant intensity differences between large sunspots. These differences may be explained by a systematic variation in the umbral temperature throughout the solar cycle. A connection between umbra intensity and heliographic latitude is discussed.No center-limb variation in the umbra/photosphere intensity ratio is detected. We have searched for possible connections between umbra intensity and a number of other sunspot parameters, like the spot size, without detecting any significant correlation. We conclude that the umbra/photosphere intensity ratio seems to be a unique function of epoch for large sunspots.

show abstract

Section: M)mentioning

confidence: 99%