Spectral analysis of mid-IR excesses of central stars of planetary nebulae

Jana Bilikova; You Hua Chu; Kate Y.L. Su; Robert Gruendl

doi:10.1017/S1743921312011179

Spectral analysis of mid-IR excesses of central stars of planetary nebulae

Jana Bilikova, You Hua Chu, Kate Y.L. Su, Robert Gruendl

Steward Observatory

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In our Spitzer 24 μm survey of hot white dwarfs (WDs) we found 9 WDs with IR excesses, 7 of them are still central stars of planetary nebulae (CSPNs). We have thus carried out a Spitzer archival survey of CSPNs, and found additional objects with IR excesses. To date, a total of 13 CSPNs show IR excesses from Spitzer observations. These mid-IR excesses are indicative of the presence of circumstellar dust, which could be produced by collisions or disruption of sub-planetary objects. To further assess the nature of these IR excesses, we have obtained Spitzer IRS, Gemini NIRI and Michelle, and KPNO 4m echelle spectra of these objects. In this poster, we summarize the spectroscopic observations and discuss the nature of these IR excesses.

Original language	English (US)
Title of host publication	Planetary Nebulae
Subtitle of host publication	An Eye to the Future
Editors	Arturo Manchado, Letizia Stanghellini, Detlef Schonberner
Pages	310-311
Number of pages	2
Edition	S283
DOIs	https://doi.org/10.1017/S1743921312011179
State	Published - Jul 2011

Publication series

Name	Proceedings of the International Astronomical Union
Number	S283
Volume	7
ISSN (Print)	1743-9213
ISSN (Electronic)	1743-9221

Keywords

circumstellar matter
infrared: stars
planetary nebulae: general

ASJC Scopus subject areas

Medicine (miscellaneous)
Astronomy and Astrophysics
Nutrition and Dietetics
Public Health, Environmental and Occupational Health
Space and Planetary Science

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10.1017/S1743921312011179

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Bilikova, J., Chu, Y. H., Su, K. Y. L., & Gruendl, R. (2011). Spectral analysis of mid-IR excesses of central stars of planetary nebulae. In A. Manchado, L. Stanghellini, & D. Schonberner (Eds.), Planetary Nebulae: An Eye to the Future (S283 ed., pp. 310-311). (Proceedings of the International Astronomical Union; Vol. 7, No. S283). https://doi.org/10.1017/S1743921312011179

Spectral analysis of mid-IR excesses of central stars of planetary nebulae. / Bilikova, Jana; Chu, You Hua; Su, Kate Y.L. et al.
Planetary Nebulae: An Eye to the Future. ed. / Arturo Manchado; Letizia Stanghellini; Detlef Schonberner. S283. ed. 2011. p. 310-311 (Proceedings of the International Astronomical Union; Vol. 7, No. S283).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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abstract = "In our Spitzer 24 μm survey of hot white dwarfs (WDs) we found 9 WDs with IR excesses, 7 of them are still central stars of planetary nebulae (CSPNs). We have thus carried out a Spitzer archival survey of CSPNs, and found additional objects with IR excesses. To date, a total of 13 CSPNs show IR excesses from Spitzer observations. These mid-IR excesses are indicative of the presence of circumstellar dust, which could be produced by collisions or disruption of sub-planetary objects. To further assess the nature of these IR excesses, we have obtained Spitzer IRS, Gemini NIRI and Michelle, and KPNO 4m echelle spectra of these objects. In this poster, we summarize the spectroscopic observations and discuss the nature of these IR excesses.",

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Spectral analysis of mid-IR excesses of central stars of planetary nebulae

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