NOAO > Observing Info > Approved Programs > 2013A-0104
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NOAO > Observing Info > Approved Programs > 2013A-0104 |
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PI: Sebastiano Cantalupo, UC Santa Cruz, cantal@ucolick.org
Address: Astronomy and Astrophysics Board of Study, Natural Sciences II, Santa Cruz, CA, 95064, USA
CoI: Joseph F. Hennawi, MPIA, Heidelberg
CoI: Fabrizio Arrigoni Battaia, MPIA, Heidelberg
CoI: Jason X. Prochaska, UC Santa Cruz
CoI: Piero Madau, UC Santa Cruz
Title: Ly-alpha imaging of dark protogalactic clouds and circumgalactic streams using z 2 quasars
Abstract: The ionizing radiation emitted by a luminous quasar can, like a flashlight, illuminate hydrogen in its vicinity, allowing us to directly *image* dense filaments around galaxies and proto-galactic clouds, which are otherwise invisible because of negligible star formation. We propose to conduct deep narrow band Ly-alpha imaging of luminous quasars at z 2 to detect this Ly-a fluorescence from the surrounding intergalactic and circumgalactic (CGM) medium. Our team has made the first definitive detections of this effect, and we have developed radiative transfer simulations in a cosmological setting for direct end-to-end comparison to our proposed observations. This novel technique compliments decades of effort using absorption-line techniques and will provide an ideal target list for future kinematic analysis of the CGM.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2013A-0104 |
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