@inproceedings{0135414e2b534715ac1c84372890a7ff,
title = "Spectral analysis of mid-IR excesses of white dwarfs",
abstract = "In our Spitzer 24 μm survey of hot white dwarfs (WDs) and archival Spitzer study of pre-WDs, i.e., central stars of planetary nebulae (CSPNs), we found mid-IR excesses for ∼15 WDs/pre-WDs. These mid-IR excesses are indicative of the presence of circumstellar dust that could be produced by sub-planetary objects. To further assess the nature of these IR-excesses, we have obtained Spitzer IRS, Gemini NIRI and Michelle, and KPNO 4 m echelle spectra of these objects. In this paper we present the analysis of these spectroscopic observations and discuss the nature of these IR excesses.",
keywords = "circumstellar matter, infrared: stars, planetary nebulae: general, white dwarfs",
author = "Jana Bil{\'i}kov{\'a} and Chu, {You Hua} and Kate Su and Gruendl, {Robert A.} and Thomas Rauch",
year = "2011",
doi = "10.1063/1.3570976",
language = "English (US)",
isbn = "9780735408869",
series = "AIP Conference Proceedings",
pages = "215--221",
booktitle = "Planetary Systems Beyond the Main Sequence - Proceedings of the International Conference {"}Planetary Systems Beyond the Main Sequence{"}",
note = "International Conference {"}Planetary Systems Beyond the Main Sequence{"} ; Conference date: 11-08-2010 Through 14-08-2010",
}