Radio and IR interferometry of SiO maser stars

Markus Wittkowski; David A. Boboltz; Malcolm D. Gray; Elizabeth M L Humphreys; Iva Karovicova; Michael Scholz; R S {Booth}; W H T {Vlemmings}

doi:10.1017/S1743921312006989

Radio and IR interferometry of SiO maser stars

Markus Wittkowski, David A. Boboltz, Malcolm D. Gray, Elizabeth M L Humphreys, Iva Karovicova, Michael Scholz, R S {Booth} (Editor), W H T {Vlemmings} (Editor)

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

Abstract

Radio and infrared interferometry of SiO maser stars provide complementary information on the atmosphere and circumstellar environment at comparable spatial resolution. Here, we present the latest results on the atmospheric structure and the dust condensation region of AGB stars based on our recent infrared spectro-interferometric observations, which represent the environment of SiO masers. We discuss, as an example, new results from simultaneous VLTI and VLBA observations of the Mira variable AGB star R Cnc, including VLTI near- and mid-infrared interferometry, as well as VLBA observations of the SiO maser emission toward this source. We present preliminary results from a monitoring campaign of high-frequency SiO maser emission toward evolved stars obtained with the APEX telescope, which also serves as a precursor of ALMA images of the SiO emitting region. We speculate that large-scale long-period chaotic motion in the extended molecular atmosphere may be the physical reason for observed deviations from point symmetry of atmospheric molecular layers, and for the observed erratic variability of high-frequency SiO maser emission. Copyright © International Astronomical Union 2012.

Original language	English
Title of host publication	Proceedings of the International Astronomical Union\|Proc. Int. Astron. Union
Editors	R S {Booth}, W H T {Vlemmings}, E M L {Humphreys}
Place of Publication	Cambridge, UK
Publisher	Cambridge University Press
Pages	209-216
Number of pages	7
Volume	8
ISBN (Print)	9781107032842
DOIs	https://doi.org/10.1017/S1743921312006989
Publication status	Published - Jul 2012
Event	Cosmic Masers - from OH to H0 - Stellenbosch, South Africa Duration: 29 Jan 2012 → 3 Feb 2012

Conference

Conference	Cosmic Masers - from OH to H0
City	Stellenbosch, South Africa
Period	29/01/12 → 3/02/12

Keywords

masers
radiative transfer
stars: AGB and post-AGB
stars: atmospheres
stars: circumstellar matter
stars: fundamental parameters
stars: mass loss
supergiants
techniques: interferometric
turbulence

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10.1017/S1743921312006989

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Wittkowski, M., Boboltz, D. A., Gray, M. D., Humphreys, E. M. L., Karovicova, I., Scholz, M., {Booth}, R. S. (Ed.), & {Vlemmings}, W. H. T. (Ed.) (2012). Radio and IR interferometry of SiO maser stars. In R. S. {Booth}, W. H. T. {Vlemmings}, & E. M. L. {Humphreys} (Eds.), Proceedings of the International Astronomical Union|Proc. Int. Astron. Union (Vol. 8, pp. 209-216). Cambridge University Press. https://doi.org/10.1017/S1743921312006989

@inproceedings{9bb3a72f42ff4fd4870f4920645dc10f,

title = "Radio and IR interferometry of SiO maser stars",

abstract = "Radio and infrared interferometry of SiO maser stars provide complementary information on the atmosphere and circumstellar environment at comparable spatial resolution. Here, we present the latest results on the atmospheric structure and the dust condensation region of AGB stars based on our recent infrared spectro-interferometric observations, which represent the environment of SiO masers. We discuss, as an example, new results from simultaneous VLTI and VLBA observations of the Mira variable AGB star R Cnc, including VLTI near- and mid-infrared interferometry, as well as VLBA observations of the SiO maser emission toward this source. We present preliminary results from a monitoring campaign of high-frequency SiO maser emission toward evolved stars obtained with the APEX telescope, which also serves as a precursor of ALMA images of the SiO emitting region. We speculate that large-scale long-period chaotic motion in the extended molecular atmosphere may be the physical reason for observed deviations from point symmetry of atmospheric molecular layers, and for the observed erratic variability of high-frequency SiO maser emission. Copyright {\textcopyright} International Astronomical Union 2012.",

keywords = "masers, radiative transfer, stars: AGB and post-AGB, stars: atmospheres, stars: circumstellar matter, stars: fundamental parameters, stars: mass loss, supergiants, techniques: interferometric, turbulence",

author = "Markus Wittkowski and Boboltz, {David A.} and Gray, {Malcolm D.} and Humphreys, {Elizabeth M L} and Iva Karovicova and Michael Scholz and {Booth}, {R S} and {Vlemmings}, {W H T}",

year = "2012",

month = jul,

doi = "10.1017/S1743921312006989",

language = "English",

isbn = "9781107032842",

volume = "8",

pages = "209--216",

editor = "{Booth}, {R S} and {Vlemmings}, {W H T} and {Humphreys}, {E M L}",

booktitle = "Proceedings of the International Astronomical Union|Proc. Int. Astron. Union",

publisher = "Cambridge University Press",

address = "United Kingdom",

note = "Cosmic Masers - from OH to H0 ; Conference date: 29-01-2012 Through 03-02-2012",

}

Wittkowski, M, Boboltz, DA, Gray, MD, Humphreys, EML, Karovicova, I, Scholz, M, {Booth}, RS (ed.) & {Vlemmings}, WHT (ed.) 2012, Radio and IR interferometry of SiO maser stars. in RS {Booth}, WHT {Vlemmings} & EML {Humphreys} (eds), Proceedings of the International Astronomical Union|Proc. Int. Astron. Union. vol. 8, Cambridge University Press, Cambridge, UK, pp. 209-216, Cosmic Masers - from OH to H0, Stellenbosch, South Africa, 29/01/12. https://doi.org/10.1017/S1743921312006989

Radio and IR interferometry of SiO maser stars. / Wittkowski, Markus; Boboltz, David A.; Gray, Malcolm D. et al.
Proceedings of the International Astronomical Union|Proc. Int. Astron. Union. ed. / R S {Booth}; W H T {Vlemmings}; E M L {Humphreys}. Vol. 8 Cambridge, UK: Cambridge University Press, 2012. p. 209-216.

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

TY - GEN

T1 - Radio and IR interferometry of SiO maser stars

AU - Wittkowski, Markus

AU - Boboltz, David A.

AU - Gray, Malcolm D.

AU - Humphreys, Elizabeth M L

AU - Karovicova, Iva

AU - Scholz, Michael

A2 - {Booth}, R S

A2 - {Vlemmings}, W H T

A2 - {Booth}, R S

A2 - {Vlemmings}, W H T

A2 - {Humphreys}, E M L

PY - 2012/7

Y1 - 2012/7

N2 - Radio and infrared interferometry of SiO maser stars provide complementary information on the atmosphere and circumstellar environment at comparable spatial resolution. Here, we present the latest results on the atmospheric structure and the dust condensation region of AGB stars based on our recent infrared spectro-interferometric observations, which represent the environment of SiO masers. We discuss, as an example, new results from simultaneous VLTI and VLBA observations of the Mira variable AGB star R Cnc, including VLTI near- and mid-infrared interferometry, as well as VLBA observations of the SiO maser emission toward this source. We present preliminary results from a monitoring campaign of high-frequency SiO maser emission toward evolved stars obtained with the APEX telescope, which also serves as a precursor of ALMA images of the SiO emitting region. We speculate that large-scale long-period chaotic motion in the extended molecular atmosphere may be the physical reason for observed deviations from point symmetry of atmospheric molecular layers, and for the observed erratic variability of high-frequency SiO maser emission. Copyright © International Astronomical Union 2012.

AB - Radio and infrared interferometry of SiO maser stars provide complementary information on the atmosphere and circumstellar environment at comparable spatial resolution. Here, we present the latest results on the atmospheric structure and the dust condensation region of AGB stars based on our recent infrared spectro-interferometric observations, which represent the environment of SiO masers. We discuss, as an example, new results from simultaneous VLTI and VLBA observations of the Mira variable AGB star R Cnc, including VLTI near- and mid-infrared interferometry, as well as VLBA observations of the SiO maser emission toward this source. We present preliminary results from a monitoring campaign of high-frequency SiO maser emission toward evolved stars obtained with the APEX telescope, which also serves as a precursor of ALMA images of the SiO emitting region. We speculate that large-scale long-period chaotic motion in the extended molecular atmosphere may be the physical reason for observed deviations from point symmetry of atmospheric molecular layers, and for the observed erratic variability of high-frequency SiO maser emission. Copyright © International Astronomical Union 2012.

KW - masers

KW - radiative transfer

KW - stars: AGB and post-AGB

KW - stars: atmospheres

KW - stars: circumstellar matter

KW - stars: fundamental parameters

KW - stars: mass loss

KW - supergiants

KW - techniques: interferometric

KW - turbulence

U2 - 10.1017/S1743921312006989

DO - 10.1017/S1743921312006989

M3 - Conference contribution

SN - 9781107032842

VL - 8

SP - 209

EP - 216

BT - Proceedings of the International Astronomical Union|Proc. Int. Astron. Union

PB - Cambridge University Press

CY - Cambridge, UK

T2 - Cosmic Masers - from OH to H0

Y2 - 29 January 2012 through 3 February 2012

ER -

Radio and IR interferometry of SiO maser stars

Abstract

Conference

Keywords

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