The emission-line spectrum above the limb of the quiet Sun: 1175--1940 A

Journal Article · Thu Jul 01 04:00:00 EDT 1976 · Astrophys. J., Suppl. Ser.; (United States)

DOI:https://doi.org/10.1086/190386· OSTI ID:7356388

Doschek, G A; Feldman, U; VanHoosier, M E; Bartoe, J F

Spectra of a quiet-Sun region obtained at positions within and above the solar white-light limb in the wavelength region from 1175 to 1940 A are discussed. The spectra were obtained by the NRL slit spectrograph (SO82-B) on Skylab. The spectral resolution is 0.06 A and the projected slit area on the Sun was 2'' x 60' (1450 x 43500 km). Relative line intensities are presented for lines formed in the temperature region of the solar atmosphere from approx.8 x 10/sup 3/ to 2.2 x 10/sup 5/ K. Representative line profiles of both optically thin and optically thick lines are shown as a function of height above the limb. Random mass-motion velocities are deduced from the optically thin lines, and the relative intensities and profiles of the lines are discussed in terms of current theoretical models. A wavelength list with identifications is given for the spectrum obtained at +4'' above the white light limb. (AIP)

• Research Organization: E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington D.C.
• OSTI ID: 7356388
• Journal Information: Astrophys. J., Suppl. Ser.; (United States), Journal Name: Astrophys. J., Suppl. Ser.; (United States) Vol. 31:3; ISSN APJSA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ATMOSPHERES
CHEMICAL COMPOSITION
ELECTROMAGNETIC RADIATION
EMISSION SPECTRA
FUNCTIONS
LINE WIDTHS
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SOLAR ATMOSPHERE
SPECTRA
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
STARS
SUN
ULTRAVIOLET RADIATION