NOAO >   Observing Info >   Approved Programs >   2001A-0350

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Proposal Information for 2001A-0350


PI: Peter McCullough, University of Illinois, Urbana Champaign, pmcc@astro.uiuc.edu
Address: 1002 W. Green St., Urbana, IL 61801, USA

CoI: Bob Benjamin, University of Wisconsin, Madison

Title: An Interstellar Contrail

Abstract: We have found an object that looks like a contrail behind an airplane. (We call it ``the interstellar contrail'' for fun.) It is 2.5\arcdeg long; it is 20\arcsec wide near one end, and diverges into three filaments separated by 5\arcmin at its other end. The length-to- width ratio is thus very large (2.5\arcdeg/20\arcsec=450). In H(alpha), its surface brightness is 0.5 Rayleighs (EM=1 cm^-6 pc). Its straightness and its length make it a unique object. We wish to find out what it is, and especially determine if it could be the ionization trail left by a fast, nearby, hot star, and then if that is true, (in some future proposal) we will propose to find the star and study it.


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NOAO >   Observing Info >   Approved Programs >   2001A-0350

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