A Very Large Array search for emission from HI associated with nearby Lyman alpha absorbers

Details A Very Large Array search for emission from HI associated with nearby Lyman alpha absorbers A Very Large Array search for emission from HI associated with nearby Lyman alpha absorbers

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993aj....106.2213v&link_type=abstract

The Astronomical Journal (ISSN 0004-6256), vol. 106, no. 6, p. 2213-2217

Astronomy and Astrophysics

Astronomy

31

Emission Spectra, Hydrogen, Lyman Alpha Radiation, Molecular Clouds, Quasars, Radiation Absorption, Virgo Galactic Cluster, Calibrating, Radio Astronomy, Red Shift, Sky Surveys (Astronomy), Very Large Array (Vla)

Scientific paper

We present a sensitive Very Large Array (VLA) search for H I emission from the vicinity of the Lyman alpha clouds in the Virgo Cluster, which were recently discovered with Hubble Space Telescope (HST) in absorption toward the nearest quasar 3C273. We searched an area of 40 by 40 arcmin centered on 3C273, covering a velocity range from 840 to 1840 km/s. The bandpass was self-calibrated on 3C273 leading to a spectral dynamic range of better than 105 to 1. No H I was detected. The rms noise in the final images corresponds to a 3 sigma column density sensitivity of 2.8 x 1019 sq cm on scales of a few kpc. Small H I clouds could have been detected down to a few times 106 solar mass. Our failure to detect H I emission at the higher column densities sets a lower limit to the radius of the Lyman alpha clouds of 3.9 kpc, assuming a spherical geometry.

Affiliated with

Also associated with

No associations

Rating

A Very Large Array search for emission from HI associated with nearby Lyman alpha absorbers 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 A Very Large Array search for emission from HI associated with nearby Lyman alpha absorbers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Very Large Array search for emission from HI associated with nearby Lyman alpha absorbers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-783334