Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array

Laurent Loinard; Mark Thompson; Melvin Hoare; Huib Jan van Langevelde; Simon Ellingsen; Andreas Brunthaler; Jan Forbrich; Kazi L. J. Rygl; Luis F. Rodriguez; Amy J. Mioduszewski; Rosa M. Torres-Lopez; Sergio A. Dzib; Gisela N. Ortiz-Leon; Tyler L. Bourke; James A. Green

Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array

Laurent Loinard, Mark Thompson, Melvin Hoare, Huib Jan van Langevelde, Simon Ellingsen, Andreas Brunthaler, Jan Forbrich, Kazi L. J. Rygl, Luis F. Rodriguez, Amy J. Mioduszewski, Rosa M. Torres-Lopez, Sergio A. Dzib, Gisela N. Ortiz-Leon, Tyler L. Bourke, James A. Green

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Abstract

Very Long Baseline Interferometry (VLBI) at radio wavelengths can provide astrometry accurate to 10 micro-arcseconds or better (i.e. better than the target GAIA accuracy) without being limited by dust obscuration. This means that unlike GAIA, VLBI can be applied to star-forming regions independently of their internal and line-of-sight extinction. Low-mass young stellar objects (particularly T Tauri stars) are often non-thermal compact radio emitters, ideal for astrometric VLBI radio continuum experiments. Existing observations for nearby regions (e.g. Taurus, Ophiuchus, or Orion) demonstrate that VLBI astrometry of such active T Tauri stars enables the reconstruction of both the regions' 3D structure (through parallax measurements) and their internal kinematics (through proper motions, combined with radial velocities). The extraordinary sensitivity of the SKA telescope will enable similar "tomographic mappings" to be extended to regions located several kpc from Earth, in particular to nearby spiral arm segments. This will have important implications for Galactic science, galactic dynamics and spiral structure theories.

Original language	English
Title of host publication	Advancing Astrophysics with the Square Kilometre Array
Publisher	Proceedings of Science (PoS)
Number of pages	8
Publication status	Published - 19 Dec 2014
Event	Advancing Astrophysics with the Square Kilometre Array - Giardini Naxos, Sicily, Italy Duration: 9 Jun 2014 → 13 Jun 2014

Conference

Conference	Advancing Astrophysics with the Square Kilometre Array
Abbreviated title	AA SKA14
Country/Territory	Italy
City	Sicily
Period	9/06/14 → 13/06/14

Keywords

astro-ph.SR
astro-ph.GA

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Published VersionFinal published version, 656 KBLicence: CC BY-NC-SA

https://pos.sissa.it/215/

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Loinard, L., Thompson, M., Hoare, M., Langevelde, H. J. V., Ellingsen, S., Brunthaler, A., Forbrich, J., Rygl, K. L. J., Rodriguez, L. F., Mioduszewski, A. J., Torres-Lopez, R. M., Dzib, S. A., Ortiz-Leon, G. N., Bourke, T. L., & Green, J. A. (2014). Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array. In Advancing Astrophysics with the Square Kilometre Array Proceedings of Science (PoS). https://pos.sissa.it/215/

@inproceedings{e338afa04b804655ab26a62f7156ebe4,

title = "Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array",

abstract = "Very Long Baseline Interferometry (VLBI) at radio wavelengths can provide astrometry accurate to 10 micro-arcseconds or better (i.e. better than the target GAIA accuracy) without being limited by dust obscuration. This means that unlike GAIA, VLBI can be applied to star-forming regions independently of their internal and line-of-sight extinction. Low-mass young stellar objects (particularly T Tauri stars) are often non-thermal compact radio emitters, ideal for astrometric VLBI radio continuum experiments. Existing observations for nearby regions (e.g. Taurus, Ophiuchus, or Orion) demonstrate that VLBI astrometry of such active T Tauri stars enables the reconstruction of both the regions' 3D structure (through parallax measurements) and their internal kinematics (through proper motions, combined with radial velocities). The extraordinary sensitivity of the SKA telescope will enable similar {"}tomographic mappings{"} to be extended to regions located several kpc from Earth, in particular to nearby spiral arm segments. This will have important implications for Galactic science, galactic dynamics and spiral structure theories.",

keywords = "astro-ph.SR, astro-ph.GA",

author = "Laurent Loinard and Mark Thompson and Melvin Hoare and Langevelde, {Huib Jan van} and Simon Ellingsen and Andreas Brunthaler and Jan Forbrich and Rygl, {Kazi L. J.} and Rodriguez, {Luis F.} and Mioduszewski, {Amy J.} and Torres-Lopez, {Rosa M.} and Dzib, {Sergio A.} and Ortiz-Leon, {Gisela N.} and Bourke, {Tyler L.} and Green, {James A.}",

note = "{\textcopyright} 2014 Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence https://creativecommons.org/licenses/by-nc-sa/3.0/us/. Published by Proceedings of Science http://pos.sissa.it/; Advancing Astrophysics with the Square Kilometre Array, AA SKA14 ; Conference date: 09-06-2014 Through 13-06-2014",

year = "2014",

month = dec,

day = "19",

language = "English",

booktitle = "Advancing Astrophysics with the Square Kilometre Array",

publisher = "Proceedings of Science (PoS)",

}

Loinard, L, Thompson, M, Hoare, M, Langevelde, HJV, Ellingsen, S, Brunthaler, A, Forbrich, J, Rygl, KLJ, Rodriguez, LF, Mioduszewski, AJ, Torres-Lopez, RM, Dzib, SA, Ortiz-Leon, GN, Bourke, TL & Green, JA 2014, Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array. in Advancing Astrophysics with the Square Kilometre Array. Proceedings of Science (PoS), Advancing Astrophysics with the Square Kilometre Array, Sicily, Italy, 9/06/14. <https://pos.sissa.it/215/>

TY - GEN

T1 - Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array

AU - Loinard, Laurent

AU - Thompson, Mark

AU - Hoare, Melvin

AU - Langevelde, Huib Jan van

AU - Ellingsen, Simon

AU - Brunthaler, Andreas

AU - Forbrich, Jan

AU - Rygl, Kazi L. J.

AU - Rodriguez, Luis F.

AU - Mioduszewski, Amy J.

AU - Torres-Lopez, Rosa M.

AU - Dzib, Sergio A.

AU - Ortiz-Leon, Gisela N.

AU - Bourke, Tyler L.

AU - Green, James A.

N1 - © 2014 Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence https://creativecommons.org/licenses/by-nc-sa/3.0/us/. Published by Proceedings of Science http://pos.sissa.it/

PY - 2014/12/19

Y1 - 2014/12/19

N2 - Very Long Baseline Interferometry (VLBI) at radio wavelengths can provide astrometry accurate to 10 micro-arcseconds or better (i.e. better than the target GAIA accuracy) without being limited by dust obscuration. This means that unlike GAIA, VLBI can be applied to star-forming regions independently of their internal and line-of-sight extinction. Low-mass young stellar objects (particularly T Tauri stars) are often non-thermal compact radio emitters, ideal for astrometric VLBI radio continuum experiments. Existing observations for nearby regions (e.g. Taurus, Ophiuchus, or Orion) demonstrate that VLBI astrometry of such active T Tauri stars enables the reconstruction of both the regions' 3D structure (through parallax measurements) and their internal kinematics (through proper motions, combined with radial velocities). The extraordinary sensitivity of the SKA telescope will enable similar "tomographic mappings" to be extended to regions located several kpc from Earth, in particular to nearby spiral arm segments. This will have important implications for Galactic science, galactic dynamics and spiral structure theories.

AB - Very Long Baseline Interferometry (VLBI) at radio wavelengths can provide astrometry accurate to 10 micro-arcseconds or better (i.e. better than the target GAIA accuracy) without being limited by dust obscuration. This means that unlike GAIA, VLBI can be applied to star-forming regions independently of their internal and line-of-sight extinction. Low-mass young stellar objects (particularly T Tauri stars) are often non-thermal compact radio emitters, ideal for astrometric VLBI radio continuum experiments. Existing observations for nearby regions (e.g. Taurus, Ophiuchus, or Orion) demonstrate that VLBI astrometry of such active T Tauri stars enables the reconstruction of both the regions' 3D structure (through parallax measurements) and their internal kinematics (through proper motions, combined with radial velocities). The extraordinary sensitivity of the SKA telescope will enable similar "tomographic mappings" to be extended to regions located several kpc from Earth, in particular to nearby spiral arm segments. This will have important implications for Galactic science, galactic dynamics and spiral structure theories.

KW - astro-ph.SR

KW - astro-ph.GA

M3 - Conference contribution

BT - Advancing Astrophysics with the Square Kilometre Array

PB - Proceedings of Science (PoS)

T2 - Advancing Astrophysics with the Square Kilometre Array

Y2 - 9 June 2014 through 13 June 2014

ER -

Tomography of Galactic star-forming regions and spiral arms with the Square Kilometer Array

Abstract

Conference

Keywords

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