POST ASYMPTOTIC GIANT BRANCH BIPOLAR REFLECTION NEBULAE: RESULT OF DYNAMICAL EJECTION OR SELECTIVE ILLUMINATION?

Koning, N.; Kwok, Sun

doi:10.1088/0004-637X/765/2/92

Title: POST ASYMPTOTIC GIANT BRANCH BIPOLAR REFLECTION NEBULAE: RESULT OF DYNAMICAL EJECTION OR SELECTIVE ILLUMINATION?

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Abstract

A model for post asymptotic giant branch bipolar reflection nebulae has been constructed based on a pair of evacuated cavities in a spherical dust envelope. Many of the observed features of bipolar nebulae, including filled bipolar lobes, an equatorial torus, searchlight beams, and a bright central light source, can be reproduced. The effects on orientation and dust densities are studied and comparisons with some observed examples are offered. We suggest that many observed properties of bipolar nebulae are the result of optical effects and any physical modeling of these nebulae has to take these factors into consideration.

Authors:

Koning, N. ^[1]; Kwok, Sun ^[2]

Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4 (Canada)
Department of Physics, University of Hong Kong, Pokfulam, Hong Kong (Hong Kong)

Publication Date:: Sun Mar 10 00:00:00 EST 2013

OSTI Identifier:: 22127023

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal

Additional Journal Information:: Journal Volume: 765; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; COMPARATIVE EVALUATIONS; COSMIC DUST; DENSITY; GIANT STARS; ILLUMINANCE; ORIENTATION; PLANETARY NEBULAE; REFLECTION; SPHERICAL CONFIGURATION

Citation Formats


                    Koning, N., Kwok, Sun, and Steffen, W., E-mail: nico.koning@ucalgary.ca, E-mail: sunkwok@hku.hk, E-mail: wsteffen@astrosen.unam.mx. POST ASYMPTOTIC GIANT BRANCH BIPOLAR REFLECTION NEBULAE: RESULT OF DYNAMICAL EJECTION OR SELECTIVE ILLUMINATION?.  United States: N. p., 2013. 
        Web.  doi:10.1088/0004-637X/765/2/92.

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                    Koning, N., Kwok, Sun, & Steffen, W., E-mail: nico.koning@ucalgary.ca, E-mail: sunkwok@hku.hk, E-mail: wsteffen@astrosen.unam.mx. POST ASYMPTOTIC GIANT BRANCH BIPOLAR REFLECTION NEBULAE: RESULT OF DYNAMICAL EJECTION OR SELECTIVE ILLUMINATION?.  United States.  https://doi.org/10.1088/0004-637X/765/2/92

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                    Koning, N., Kwok, Sun, and Steffen, W., E-mail: nico.koning@ucalgary.ca, E-mail: sunkwok@hku.hk, E-mail: wsteffen@astrosen.unam.mx. 2013.  
        "POST ASYMPTOTIC GIANT BRANCH BIPOLAR REFLECTION NEBULAE: RESULT OF DYNAMICAL EJECTION OR SELECTIVE ILLUMINATION?".  United States.  https://doi.org/10.1088/0004-637X/765/2/92.

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@article{osti_22127023,

  title        = {POST ASYMPTOTIC GIANT BRANCH BIPOLAR REFLECTION NEBULAE: RESULT OF DYNAMICAL EJECTION OR SELECTIVE ILLUMINATION?},

  author       = {Koning, N. and Kwok, Sun and Steffen, W., E-mail: nico.koning@ucalgary.ca, E-mail: sunkwok@hku.hk, E-mail: wsteffen@astrosen.unam.mx},

  abstractNote = {A model for post asymptotic giant branch bipolar reflection nebulae has been constructed based on a pair of evacuated cavities in a spherical dust envelope. Many of the observed features of bipolar nebulae, including filled bipolar lobes, an equatorial torus, searchlight beams, and a bright central light source, can be reproduced. The effects on orientation and dust densities are studied and comparisons with some observed examples are offered. We suggest that many observed properties of bipolar nebulae are the result of optical effects and any physical modeling of these nebulae has to take these factors into consideration.},

  doi          = {10.1088/0004-637X/765/2/92},

  url          = {https://www.osti.gov/biblio/22127023},
  journal      = {Astrophysical Journal},

  issn         = {0004-637X},

  number       = 2,

  volume       = 765,

  place        = {United States},

  year         = {Sun Mar 10 00:00:00 EST 2013},

  month        = {Sun Mar 10 00:00:00 EST 2013}

}

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