The Unusual Quasar PG 1407+265

Details The Unusual Quasar PG 1407+265 The Unusual Quasar PG 1407+265

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...450..585m&link_type=abstract

Astrophysical Journal v.450, p.585

Astronomy and Astrophysics

Astronomy

37

Galaxies: Quasars: Individual Alphanumeric: Pg 1407+265

Scientific paper

PG 1407+265, discovered in the Palomar-Green Survey (Schmidt & Green 1983), was identified as a z ˜ 1 radio-quiet quasar on the basis of a single weak line. Further observations over a wide wavelength range confirm the identification but reveal the object to have unusual emission-line properties. Broad Hα is the only strong emission line with Hβ and Lyα almost undetectably weak. The emission lines show a range in redshift of over 10,000 km s-1, systematically decreasing with ionization potential or, almost equivalently, increasing to longer wavelengths. A value of z = 0.94±0.02 is a reasonable statement of our knowledge of the quasar's redshift However, the object's continuum properties are those of a normal radio-quiet quasar. We discuss a number of possible models for the object, but its nature remains puzzling.

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