Infrared observations of the recurrent nova T Pyxidis: ancient dust   basks in the warm glow of the 2011 outburst
  We present Spitzer Space Telescope and Herschel Space Observatory infrared observations of the recurrent nova T Pyx during its 2011 eruption, complemented by ground-base optical-infrared photometry. We find that the eruption has heated dust in the pre-existing nebulosity associated with T Pyx. This is most likely interstellar dust swept up by T Pyx - either during previous eruptions or by a wind - rather than the accumulation of dust produced during eruptions. 
A. Evans (Keele University, U.K.), R. D. Gehrz (Minnesota), L. A.   Helton (NASA Ames), S. Starrfield (Arizona State), M. F....
astro-ph.SR