High resolution submillimeter observations of massive protostars

C. L. Brogan; T. R. Hunter; R. Indebetouw; C. J. Chandler; Y. L. Shirley; R. Rao; A. P. Sarma

doi:10.1007/s10509-007-9598-1

High resolution submillimeter observations of massive protostars

C. L. Brogan, T. R. Hunter, R. Indebetouw, C. J. Chandler, Y. L. Shirley, R. Rao, A. P. Sarma

Astronomy

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9 Scopus citations

Abstract

We describe results from recent Submillimeter Array observations of massive protostellar objects (CepheusA-East, NGC7538 IRS1, and G5.89-0.39) with resolutions ranging from 0.8″ to 2″. A wide range of spectral and continuum properties are observed, with one unifying theme: at these resolutions all of the studied sources reveal multiple submillimeter cores. Some are observed to have cm-wavelength counterparts, and others not, suggesting a range of evolutionary stages coexisting in close proximity. In the presence of such complexity and multiplicity of sources, these data suggest that the interpretation of diagnostics such as kinematic velocity gradients and temperatures that are strongly dependent on spatial resolution should be approached cautiously.

Original language	English (US)
Pages (from-to)	53-57
Number of pages	5
Journal	Astrophysics and Space Science
Volume	313
Issue number	1-3
DOIs	https://doi.org/10.1007/s10509-007-9598-1
State	Published - Jan 2008

Keywords

Astrochemistry
Stars: formation

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1007/s10509-007-9598-1

Cite this

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title = "High resolution submillimeter observations of massive protostars",

abstract = "We describe results from recent Submillimeter Array observations of massive protostellar objects (CepheusA-East, NGC7538 IRS1, and G5.89-0.39) with resolutions ranging from 0.8″ to 2″. A wide range of spectral and continuum properties are observed, with one unifying theme: at these resolutions all of the studied sources reveal multiple submillimeter cores. Some are observed to have cm-wavelength counterparts, and others not, suggesting a range of evolutionary stages coexisting in close proximity. In the presence of such complexity and multiplicity of sources, these data suggest that the interpretation of diagnostics such as kinematic velocity gradients and temperatures that are strongly dependent on spatial resolution should be approached cautiously.",

keywords = "Astrochemistry, Stars: formation",

author = "Brogan, {C. L.} and Hunter, {T. R.} and R. Indebetouw and Chandler, {C. J.} and Shirley, {Y. L.} and R. Rao and Sarma, {A. P.}",

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doi = "10.1007/s10509-007-9598-1",

language = "English (US)",

volume = "313",

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TY - JOUR

T1 - High resolution submillimeter observations of massive protostars

AU - Brogan, C. L.

AU - Hunter, T. R.

AU - Indebetouw, R.

AU - Chandler, C. J.

AU - Shirley, Y. L.

AU - Rao, R.

AU - Sarma, A. P.

PY - 2008/1

Y1 - 2008/1

N2 - We describe results from recent Submillimeter Array observations of massive protostellar objects (CepheusA-East, NGC7538 IRS1, and G5.89-0.39) with resolutions ranging from 0.8″ to 2″. A wide range of spectral and continuum properties are observed, with one unifying theme: at these resolutions all of the studied sources reveal multiple submillimeter cores. Some are observed to have cm-wavelength counterparts, and others not, suggesting a range of evolutionary stages coexisting in close proximity. In the presence of such complexity and multiplicity of sources, these data suggest that the interpretation of diagnostics such as kinematic velocity gradients and temperatures that are strongly dependent on spatial resolution should be approached cautiously.

AB - We describe results from recent Submillimeter Array observations of massive protostellar objects (CepheusA-East, NGC7538 IRS1, and G5.89-0.39) with resolutions ranging from 0.8″ to 2″. A wide range of spectral and continuum properties are observed, with one unifying theme: at these resolutions all of the studied sources reveal multiple submillimeter cores. Some are observed to have cm-wavelength counterparts, and others not, suggesting a range of evolutionary stages coexisting in close proximity. In the presence of such complexity and multiplicity of sources, these data suggest that the interpretation of diagnostics such as kinematic velocity gradients and temperatures that are strongly dependent on spatial resolution should be approached cautiously.

KW - Astrochemistry

KW - Stars: formation

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JO - Astrophysics and Space Science

JF - Astrophysics and Space Science

IS - 1-3

ER -

High resolution submillimeter observations of massive protostars

Abstract

Keywords

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