Fixed nature of optical thickness to 10830-A radiation in flocculi and helium emission in the short-wavelength radiation field

Details Fixed nature of optical thickness to 10830-A radiation in flocculi and helium emission in the short-wavelength radiation field Fixed nature of optical thickness to 10830-A radiation in flocculi and helium emission in the short-wavelength radiation field

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sva....19..587l&link_type=abstract

(Astronomicheskii Zhurnal, vol. 52, Sept.-Oct. 1975, p. 970-974.) Soviet Astronomy, vol. 19, no. 5, 1976, p. 587-590. Translati

Astronomy and Astrophysics

Astronomy

1

Chromosphere, Gas Ionization, Helium Atoms, Metastable Atoms, Solar Radiation, Ultraviolet Radiation, Electron Density (Concentration), Helium Ions, Ionizing Radiation, Recombination Reactions, Short Wave Radiation, Solar Temperature

Scientific paper

The population of solar helium atoms in the 2(3)S metastable level is calculated taking account of helium ionization by radiation with wavelengths of less than 504 A (corresponding to a maximum temperature of 20,000 K). It is found that this population reaches a plateau with increasing electron density, in contrast to the alternative high-temperature model where these two quantities are directly proportional. Data on the helium absorption line at 10830 A, especially for plages, and the constancy of optical thickness in this line ('tau (10830)') are shown to be evidence in favor of the low-temperature mechanism of helium emission.

Affiliated with

Also associated with

No associations

Rating

Fixed nature of optical thickness to 10830-A radiation in flocculi and helium emission in the short-wavelength radiation field does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fixed nature of optical thickness to 10830-A radiation in flocculi and helium emission in the short-wavelength radiation field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fixed nature of optical thickness to 10830-A radiation in flocculi and helium emission in the short-wavelength radiation field will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1615140