First Keck interferometer measurements in self-phase referencing mode: Spatially resolving circum-stellar line emission of 48 Lib

J. U. Pott, J. Woillez, S. Ragland, P. L. Wizinowich, Joshua A Eisner, J. D. Monnier, R. L. Akeson, A. M. Ghez, J. R. Graham, L. A. Hillenbrand, R. Millan-Gabet, E. Appleby, B. Berkey, M. M. Colavita, A. Cooper, C. Felizardo, J. Herstein, M. Hrynevych, D. Medeiros, D. MorrisonT. Panteleeva, B. Smith, K. Summers, K. Tsubota, C. Tyau, E. Wetherell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Recently, the Keck interferometer was upgraded to do self-phase-referencing (SPR) assisted K-band spectroscopy at R ∼ 2000. This means, combining a spectral resolution of 150 km/s with an angular resolution of 2.7 mas, while maintaining high sensitiviy. This SPR mode operates two fringe trackers in parallel, and explores several infrastructural requirements for off-axis phase-referencing, as currently being implemented as the KI-ASTRA project. The technology of self-phasereferencing opens the way to reach very high spectral resolution in near-infrared interferometry. We present the scientific capabilities of the KI-SPR mode in detail, at the example of observations of the Be-star 48 Lib. Several spectral lines of the cirumstellar disk are resolved. We describe the first detection of Pfund-lines in an interferometric spectrum of a Be star, in addition to Br γ . The differential phase signal can be used to (i) distinguish circum-stellar line emission from the star, (ii) to directly measure line asymmetries tracing an asymetric gas density distribution, (iii) to reach a differential, astrometric precision beyond single-telescope limits sufficient for studying the radial disk structure. Our data support the existence of a radius-dependent disk density perturbation, typically used to explain slow variations of Be-disk hydrogen line profiles.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7734
DOIs
StatePublished - 2010
EventOptical and Infrared Interferometry II - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Other

OtherOptical and Infrared Interferometry II
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

Fingerprint

Interferometer
Interferometers
Stars
interferometers
Spectral resolution
Line
Star
stars
spectral resolution
Spectral Resolution
Density of gases
Interferometry
Telescopes
Hydrogen
gas density
tracing
extremely high frequencies
angular resolution
Spectroscopy
Infrared radiation

Keywords

  • Be circumstellar matter stars
  • Emission-line
  • Individual (48 lib) techniques
  • Interferometric techniques
  • Spectroscopic infrared
  • Stars

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Pott, J. U., Woillez, J., Ragland, S., Wizinowich, P. L., Eisner, J. A., Monnier, J. D., ... Wetherell, E. (2010). First Keck interferometer measurements in self-phase referencing mode: Spatially resolving circum-stellar line emission of 48 Lib. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7734). [77340P] https://doi.org/10.1117/12.856922

First Keck interferometer measurements in self-phase referencing mode : Spatially resolving circum-stellar line emission of 48 Lib. / Pott, J. U.; Woillez, J.; Ragland, S.; Wizinowich, P. L.; Eisner, Joshua A; Monnier, J. D.; Akeson, R. L.; Ghez, A. M.; Graham, J. R.; Hillenbrand, L. A.; Millan-Gabet, R.; Appleby, E.; Berkey, B.; Colavita, M. M.; Cooper, A.; Felizardo, C.; Herstein, J.; Hrynevych, M.; Medeiros, D.; Morrison, D.; Panteleeva, T.; Smith, B.; Summers, K.; Tsubota, K.; Tyau, C.; Wetherell, E.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7734 2010. 77340P.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Pott, JU, Woillez, J, Ragland, S, Wizinowich, PL, Eisner, JA, Monnier, JD, Akeson, RL, Ghez, AM, Graham, JR, Hillenbrand, LA, Millan-Gabet, R, Appleby, E, Berkey, B, Colavita, MM, Cooper, A, Felizardo, C, Herstein, J, Hrynevych, M, Medeiros, D, Morrison, D, Panteleeva, T, Smith, B, Summers, K, Tsubota, K, Tyau, C & Wetherell, E 2010, First Keck interferometer measurements in self-phase referencing mode: Spatially resolving circum-stellar line emission of 48 Lib. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7734, 77340P, Optical and Infrared Interferometry II, San Diego, CA, United States, 6/27/10. https://doi.org/10.1117/12.856922
Pott JU, Woillez J, Ragland S, Wizinowich PL, Eisner JA, Monnier JD et al. First Keck interferometer measurements in self-phase referencing mode: Spatially resolving circum-stellar line emission of 48 Lib. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7734. 2010. 77340P https://doi.org/10.1117/12.856922
Pott, J. U. ; Woillez, J. ; Ragland, S. ; Wizinowich, P. L. ; Eisner, Joshua A ; Monnier, J. D. ; Akeson, R. L. ; Ghez, A. M. ; Graham, J. R. ; Hillenbrand, L. A. ; Millan-Gabet, R. ; Appleby, E. ; Berkey, B. ; Colavita, M. M. ; Cooper, A. ; Felizardo, C. ; Herstein, J. ; Hrynevych, M. ; Medeiros, D. ; Morrison, D. ; Panteleeva, T. ; Smith, B. ; Summers, K. ; Tsubota, K. ; Tyau, C. ; Wetherell, E. / First Keck interferometer measurements in self-phase referencing mode : Spatially resolving circum-stellar line emission of 48 Lib. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7734 2010.
@inproceedings{796499da1c6f4d87bd182adab944c767,
title = "First Keck interferometer measurements in self-phase referencing mode: Spatially resolving circum-stellar line emission of 48 Lib",
abstract = "Recently, the Keck interferometer was upgraded to do self-phase-referencing (SPR) assisted K-band spectroscopy at R ∼ 2000. This means, combining a spectral resolution of 150 km/s with an angular resolution of 2.7 mas, while maintaining high sensitiviy. This SPR mode operates two fringe trackers in parallel, and explores several infrastructural requirements for off-axis phase-referencing, as currently being implemented as the KI-ASTRA project. The technology of self-phasereferencing opens the way to reach very high spectral resolution in near-infrared interferometry. We present the scientific capabilities of the KI-SPR mode in detail, at the example of observations of the Be-star 48 Lib. Several spectral lines of the cirumstellar disk are resolved. We describe the first detection of Pfund-lines in an interferometric spectrum of a Be star, in addition to Br γ . The differential phase signal can be used to (i) distinguish circum-stellar line emission from the star, (ii) to directly measure line asymmetries tracing an asymetric gas density distribution, (iii) to reach a differential, astrometric precision beyond single-telescope limits sufficient for studying the radial disk structure. Our data support the existence of a radius-dependent disk density perturbation, typically used to explain slow variations of Be-disk hydrogen line profiles.",
keywords = "Be circumstellar matter stars, Emission-line, Individual (48 lib) techniques, Interferometric techniques, Spectroscopic infrared, Stars",
author = "Pott, {J. U.} and J. Woillez and S. Ragland and Wizinowich, {P. L.} and Eisner, {Joshua A} and Monnier, {J. D.} and Akeson, {R. L.} and Ghez, {A. M.} and Graham, {J. R.} and Hillenbrand, {L. A.} and R. Millan-Gabet and E. Appleby and B. Berkey and Colavita, {M. M.} and A. Cooper and C. Felizardo and J. Herstein and M. Hrynevych and D. Medeiros and D. Morrison and T. Panteleeva and B. Smith and K. Summers and K. Tsubota and C. Tyau and E. Wetherell",
year = "2010",
doi = "10.1117/12.856922",
language = "English (US)",
isbn = "9780819482242",
volume = "7734",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",

}

TY - GEN

T1 - First Keck interferometer measurements in self-phase referencing mode

T2 - Spatially resolving circum-stellar line emission of 48 Lib

AU - Pott, J. U.

AU - Woillez, J.

AU - Ragland, S.

AU - Wizinowich, P. L.

AU - Eisner, Joshua A

AU - Monnier, J. D.

AU - Akeson, R. L.

AU - Ghez, A. M.

AU - Graham, J. R.

AU - Hillenbrand, L. A.

AU - Millan-Gabet, R.

AU - Appleby, E.

AU - Berkey, B.

AU - Colavita, M. M.

AU - Cooper, A.

AU - Felizardo, C.

AU - Herstein, J.

AU - Hrynevych, M.

AU - Medeiros, D.

AU - Morrison, D.

AU - Panteleeva, T.

AU - Smith, B.

AU - Summers, K.

AU - Tsubota, K.

AU - Tyau, C.

AU - Wetherell, E.

PY - 2010

Y1 - 2010

N2 - Recently, the Keck interferometer was upgraded to do self-phase-referencing (SPR) assisted K-band spectroscopy at R ∼ 2000. This means, combining a spectral resolution of 150 km/s with an angular resolution of 2.7 mas, while maintaining high sensitiviy. This SPR mode operates two fringe trackers in parallel, and explores several infrastructural requirements for off-axis phase-referencing, as currently being implemented as the KI-ASTRA project. The technology of self-phasereferencing opens the way to reach very high spectral resolution in near-infrared interferometry. We present the scientific capabilities of the KI-SPR mode in detail, at the example of observations of the Be-star 48 Lib. Several spectral lines of the cirumstellar disk are resolved. We describe the first detection of Pfund-lines in an interferometric spectrum of a Be star, in addition to Br γ . The differential phase signal can be used to (i) distinguish circum-stellar line emission from the star, (ii) to directly measure line asymmetries tracing an asymetric gas density distribution, (iii) to reach a differential, astrometric precision beyond single-telescope limits sufficient for studying the radial disk structure. Our data support the existence of a radius-dependent disk density perturbation, typically used to explain slow variations of Be-disk hydrogen line profiles.

AB - Recently, the Keck interferometer was upgraded to do self-phase-referencing (SPR) assisted K-band spectroscopy at R ∼ 2000. This means, combining a spectral resolution of 150 km/s with an angular resolution of 2.7 mas, while maintaining high sensitiviy. This SPR mode operates two fringe trackers in parallel, and explores several infrastructural requirements for off-axis phase-referencing, as currently being implemented as the KI-ASTRA project. The technology of self-phasereferencing opens the way to reach very high spectral resolution in near-infrared interferometry. We present the scientific capabilities of the KI-SPR mode in detail, at the example of observations of the Be-star 48 Lib. Several spectral lines of the cirumstellar disk are resolved. We describe the first detection of Pfund-lines in an interferometric spectrum of a Be star, in addition to Br γ . The differential phase signal can be used to (i) distinguish circum-stellar line emission from the star, (ii) to directly measure line asymmetries tracing an asymetric gas density distribution, (iii) to reach a differential, astrometric precision beyond single-telescope limits sufficient for studying the radial disk structure. Our data support the existence of a radius-dependent disk density perturbation, typically used to explain slow variations of Be-disk hydrogen line profiles.

KW - Be circumstellar matter stars

KW - Emission-line

KW - Individual (48 lib) techniques

KW - Interferometric techniques

KW - Spectroscopic infrared

KW - Stars

UR - http://www.scopus.com/inward/record.url?scp=79953099150&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79953099150&partnerID=8YFLogxK

U2 - 10.1117/12.856922

DO - 10.1117/12.856922

M3 - Conference contribution

AN - SCOPUS:79953099150

SN - 9780819482242

VL - 7734

BT - Proceedings of SPIE - The International Society for Optical Engineering

ER -