A SEARCH FOR MASS LOSS ON THE CEPHEID INSTABILITY STRIP USING H i 21 cm LINE OBSERVATIONS The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Citation Matthews, L. D., M. Marengo, and N. R. Evans. “A SEARCH FOR MASS LOSS ON THE CEPHEID INSTABILITY STRIP USING H i 21 Cm LINE OBSERVATIONS.” The Astronomical Journal 152, no. 6 (December 2, 2016): 200. © 2016 The American Astronomical Society. As Published http://dx.doi.org/10.3847/0004-6256/152/6/200 Publisher IOP Publishing Version Final published version Citable link http://hdl.handle.net/1721.1/108110 Terms of Use Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The Astronomical Journal, 152:200 (15pp), 2016 December doi:10.3847/0004-6256/152/6/200 © 2016. The American Astronomical Society. All rights reserved. A SEARCH FOR MASS LOSS ON THE CEPHEID INSTABILITY STRIP USING H I 21 cm LINE OBSERVATIONS L. D. Matthews1, M. Marengo2, and N. R. Evans3 1 MIT Haystack Observatory, Off Route 40, Westford, MA 01886, USA;
[email protected] 2 Department of Physics & Astronomy, Iowa State University, Ames, IA 50011, USA 3 Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-42, Cambridge, MA 02138, USA Received 2016 August 15; revised 2016 September 19; accepted 2016 September 19; published 2016 December 2 ABSTRACT We present the results of a search for H I 21 cm line emission from the circumstellar environments of four Galactic Cepheids (RS Pup, X Cyg, ζ Gem, and T Mon) based on observations with the Karl G.