Diffuse H alpha Emission in the Virgo Cluster Associated with the 3C 273 Lyman-Alpha Clouds

Details Diffuse H alpha Emission in the Virgo Cluster Associated with the 3C 273 Lyman-Alpha Clouds Diffuse H alpha Emission in the Virgo Cluster Associated with the 3C 273 Lyman-Alpha Clouds

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...419l..53w&link_type=abstract

Astrophysical Journal Letters v.419, p.L53

Astronomy and Astrophysics

Astronomy

8

Galaxies: Quasars: Absorption Lines, Galaxies: Intergalactic Medium, Galaxies: Quasars: Individual Alphanumeric: 3C 273, Galaxies: Clusters: Individual Name: Virgo

Scientific paper

We have discovered diffuse Hα emission at a velocity of 1713 +.- 4 km s^-1^ in the vicinity of the line of sight to the quasar 3C 273. The flux of this line emission is 11.7 +/- 1.8 x 10^-19^ ergs cm^-2^ sec^-1^ arcsec^-1^, and appears to be uniformly distributed over a region of at least 7.7' diameter about the quasar. The velocity of the emission agrees with that of one of the Lyα forest clouds along the line of sight to the quasar and thus is presumably part of the structure responsible for this Lyα absorption. The emission seems to arise from diffuse ionized gas within the Virgo cluster of galaxies, which is along the sightline to 3C 273.

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