First Observations of a Lyman Break Galaxy at X-Ray Wavelengths

Details First Observations of a Lyman Break Galaxy at X-Ray Wavelengths First Observations of a Lyman Break Galaxy at X-Ray Wavelengths

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999cxo..prop..152a&link_type=abstract

Chandra Proposal ID #01600773

Computer Science

Chandra Proposal Id #01600773

Scientific paper

We propose a deep (50ks) ACIS observation of the z=2.72 Lyman break galaxy cB58. Gravitational lensing by the foreground galaxy cluster MS1512 has boosted the flux by a factor of 40, allowing this high redshift galaxy to be studied in exquisite detail. The unique imaging capabilities of AXAF will enable us to derive the X-ray luminosity, which in turn will give an independent measure of the star formation rate. Comparison with the far-UV luminosity will then provide the first reliable determination of the UV attenuation by dust. This will allow an estimate of the correction to the comoving star formation rate at z~3. The soft X-ray spectrum may also allow us to place an upper limit on the neutral hydrogen column density and hence constrain the metallicity of the interstellar gas.

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