Subarcsecond optical imaging of proto-planetary nebulae

Bruce J. Hrivnak; Philip P. Langill; Kate Y.L. Su; Sun Kwok

doi:10.1086/306821

Subarcsecond optical imaging of proto-planetary nebulae

Bruce J. Hrivnak, Philip P. Langill, Kate Y.L. Su, Sun Kwok

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

We find nine of them to be resolved, with sizes up to 3″, and two others to perhaps also be extended. Of the nine, four appear to be elliptical in shape. Thus an aspherical morphology is demonstrated to commonly exist early in the transition between the asymptotic giant branch and planetary nebula phases. The results of this larger observational study, together with the previously published imaging studies, indicate that most PPNs are elliptical (or bipolar) in shape.

Original language	English (US)
Pages (from-to)	421-427
Number of pages	7
Journal	Astrophysical Journal
Volume	513
Issue number	1 PART 1
DOIs	https://doi.org/10.1086/306821
State	Published - Mar 1 1999
Externally published	Yes

Keywords

ISM: structure
Stars: AGB and post-AGB
Stars: imaging
Stars: mass loss

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/306821

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title = "Subarcsecond optical imaging of proto-planetary nebulae",

abstract = "We find nine of them to be resolved, with sizes up to 3″, and two others to perhaps also be extended. Of the nine, four appear to be elliptical in shape. Thus an aspherical morphology is demonstrated to commonly exist early in the transition between the asymptotic giant branch and planetary nebula phases. The results of this larger observational study, together with the previously published imaging studies, indicate that most PPNs are elliptical (or bipolar) in shape.",

keywords = "ISM: structure, Stars: AGB and post-AGB, Stars: imaging, Stars: mass loss",

author = "Hrivnak, {Bruce J.} and Langill, {Philip P.} and Su, {Kate Y.L.} and Sun Kwok",

year = "1999",

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T1 - Subarcsecond optical imaging of proto-planetary nebulae

AU - Hrivnak, Bruce J.

AU - Langill, Philip P.

AU - Su, Kate Y.L.

AU - Kwok, Sun

PY - 1999/3/1

Y1 - 1999/3/1

N2 - We find nine of them to be resolved, with sizes up to 3″, and two others to perhaps also be extended. Of the nine, four appear to be elliptical in shape. Thus an aspherical morphology is demonstrated to commonly exist early in the transition between the asymptotic giant branch and planetary nebula phases. The results of this larger observational study, together with the previously published imaging studies, indicate that most PPNs are elliptical (or bipolar) in shape.

AB - We find nine of them to be resolved, with sizes up to 3″, and two others to perhaps also be extended. Of the nine, four appear to be elliptical in shape. Thus an aspherical morphology is demonstrated to commonly exist early in the transition between the asymptotic giant branch and planetary nebula phases. The results of this larger observational study, together with the previously published imaging studies, indicate that most PPNs are elliptical (or bipolar) in shape.

KW - ISM: structure

KW - Stars: AGB and post-AGB

KW - Stars: imaging

KW - Stars: mass loss

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 1

ER -

Subarcsecond optical imaging of proto-planetary nebulae

Abstract

Keywords

ASJC Scopus subject areas

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