Variation in hydrogen emission lines of the QSO PKS 0736 + 017

Details Variation in hydrogen emission lines of the QSO PKS 0736 + 017 Variation in hydrogen emission lines of the QSO PKS 0736 + 017

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...306l..67z&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 306, July 15, 1986, p. L67-L69.

Astronomy and Astrophysics

Astrophysics

24

Astronomical Spectroscopy, Emission Spectra, Lines, Quasars, Seyfert Galaxies, H Beta Line, H Gamma Line, Spectral Line Width

Scientific paper

Significant variations of the broad hydrogen emission lines in the QSO 0736 + 017 have been found. Between 1978 and 1980 the H-beta line intensity dropped by 40-percent, and between 1985 and 1986 it increased by more than 50 percent. The H-gamma line intensity underwent a larger fractional change. Line variations occurred in less than 1 yr after variations of the underlying continuum, indicating that a major part of the broad line emission originates in a region of 1 lt-yr or smaller if it is spherical.

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