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Spitzer IRS spectroscopy of planetary nebulae

Published online by Cambridge University Press:  08 August 2017

G. Ramos-Larios ,
M. A. Guerrero ,
H. Mata ,
X. Fang ,
A. Nigoche-Netro ,
J. A. Toalá  and
G. Rubio
G. Ramos-Larios
Affiliation:
Instituto de Astronomía y Meteorología, CUCEI, Universidad de Guadalajara, Av. Vallarta No. 2602, Guadalajara, Jalisco, Mexico email: [email protected]
M. A. Guerrero
Affiliation:
Instituto de Astrofísica de Andalucía, IAA-CSIC, C/ Glorieta de la Astronomía s/n, 18008 Granada, Spain
H. Mata
Affiliation:
Instituto de Astronomía y Meteorología, CUCEI, Universidad de Guadalajara, Av. Vallarta No. 2602, Guadalajara, Jalisco, Mexico email: [email protected]
X. Fang
Affiliation:
Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong
A. Nigoche-Netro
Affiliation:
Instituto de Astronomía y Meteorología, CUCEI, Universidad de Guadalajara, Av. Vallarta No. 2602, Guadalajara, Jalisco, Mexico email: [email protected]
J. A. Toalá
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica (ASIAA), Taipei 10617, Taiwan
G. Rubio
Affiliation:
Instituto de Astronomía y Meteorología, CUCEI, Universidad de Guadalajara, Av. Vallarta No. 2602, Guadalajara, Jalisco, Mexico email: [email protected]
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Abstract

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We present Spitzer Space Telescope archival mid-infrared (mid-IR) spectroscopy of a sample of eleven planetary nebulae (PNe). The observations, acquired with the Spitzer Infrared Spectrograph (IRS), cover the spectral range 5.2-14.5 μm that includes the H2 0-0 S(2) to S(7) rotational emission lines. This wavelength coverage has allowed us to derive the Boltzmann distribution and calculate the H2 rotational excitation temperature (Tex). The derived excitation temperatures have consistent values ≃ 900 ±70 K for different sources despite their different structural components. We also report the detection of mid-IR ionic lines of [Ar iii], [S iv], and [Ne ii] in most objects, and polycyclic aromatic hydrocarbon (PAH) features in a few cases.

Keywords

Planetary nebulae: generalISM: lines and bandsinfrared: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S323: Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution , October 2016 , pp. 335 - 336
Copyright
Copyright © International Astronomical Union 2017 

References

Mata, H., Ramos-Larios, G., Guerrero, M. A., et al. 2016, MNRAS, 459, 841 Google Scholar