All sky extrasolar planet searches with multi-object dispersed fixed-delay interferometer in optical and near IR

Jian Ge, Suvrath Mahadevan, Julian Van Eyken, Curtis Dewitt, Jerry Friedman, Deqing Ren

Research output: Contribution to journalConference article

3 Citations (Scopus)

Abstract

An all sky survey for extrasolar planets with wide field telescopes, Sloan 2.5m and WIYN 3.5 telescopes, is being developed. This survey will use a multi-object version of current Exoplanet Tracker (ET) Doppler instrument commissioned at the KPNO 2.1m telescope in June 2004. This instrument is based on dispersed fixed-delay interferometer, a combination of a Michelson interferometer with a moderate dispersion spectrometer (Ge 2002). This custom designed instrument (f/2 optics) has a wavelength coverage of ∼ 600 Å with a 4k×4k CCD camera at a spectral resolution of R = 5,000. The measured instrument detection efficiency, including telescope, fiber, interferometer, spectrometer and detector losses, has ∼ 18% (or 50% throughput from the fiber input to the detector), more than 4 times higher than current echelle instruments being used for planet detection. ET has been able to routinely obtain S/N ∼ 80 data for V ∼ 8 mag. stars in 15 min exposures with the KPNO 2.1m. It allows us to reach ∼3.5 m/s Doppler precision for radial velocity (RV) stable stars with S/N ∼ 120 per pixel. It also allows us to confirm an exoplanet curve of HD 130322 (V = 8.05) with rms Doppler error of 12.3 m/s (preliminary results). We are in the middle of design of two prototype multiple object RV instrument for the Sloan and WIYN telescopes, which are capable of observing 50 stars (V ∼ 8-13) in a single exposure. We plan to conduct the all sky survey for planets around ∼ 1 millions of stars with Sloan starting in 2008. Our goal is to identify ∼ 100,000 extrasolar planets with ∼ 1,000 solar analogues through this survey.

Original languageEnglish (US)
Pages (from-to)711-718
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5492
Issue numberPART 2
DOIs
StatePublished - Dec 24 2004
EventGround-based Instrumentation for Astronomy - Glasgow, United Kingdom
Duration: Jun 21 2004Jun 25 2004

Fingerprint

Extrasolar planets
Extrasolar Planets
extrasolar planets
Interferometer
Interferometers
sky
Telescopes
interferometers
Telescope
Exoplanets
Stars
telescopes
Star
Doppler
Radial velocity
stars
Planets
Spectrometer
radial velocity
Spectrometers

All Science Journal Classification (ASJC) codes

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

Cite this

@article{68d85593569146749ce330095b446b91,
title = "All sky extrasolar planet searches with multi-object dispersed fixed-delay interferometer in optical and near IR",
abstract = "An all sky survey for extrasolar planets with wide field telescopes, Sloan 2.5m and WIYN 3.5 telescopes, is being developed. This survey will use a multi-object version of current Exoplanet Tracker (ET) Doppler instrument commissioned at the KPNO 2.1m telescope in June 2004. This instrument is based on dispersed fixed-delay interferometer, a combination of a Michelson interferometer with a moderate dispersion spectrometer (Ge 2002). This custom designed instrument (f/2 optics) has a wavelength coverage of ∼ 600 {\AA} with a 4k×4k CCD camera at a spectral resolution of R = 5,000. The measured instrument detection efficiency, including telescope, fiber, interferometer, spectrometer and detector losses, has ∼ 18{\%} (or 50{\%} throughput from the fiber input to the detector), more than 4 times higher than current echelle instruments being used for planet detection. ET has been able to routinely obtain S/N ∼ 80 data for V ∼ 8 mag. stars in 15 min exposures with the KPNO 2.1m. It allows us to reach ∼3.5 m/s Doppler precision for radial velocity (RV) stable stars with S/N ∼ 120 per pixel. It also allows us to confirm an exoplanet curve of HD 130322 (V = 8.05) with rms Doppler error of 12.3 m/s (preliminary results). We are in the middle of design of two prototype multiple object RV instrument for the Sloan and WIYN telescopes, which are capable of observing 50 stars (V ∼ 8-13) in a single exposure. We plan to conduct the all sky survey for planets around ∼ 1 millions of stars with Sloan starting in 2008. Our goal is to identify ∼ 100,000 extrasolar planets with ∼ 1,000 solar analogues through this survey.",
author = "Jian Ge and Suvrath Mahadevan and {Van Eyken}, Julian and Curtis Dewitt and Jerry Friedman and Deqing Ren",
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doi = "10.1117/12.551989",
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All sky extrasolar planet searches with multi-object dispersed fixed-delay interferometer in optical and near IR. / Ge, Jian; Mahadevan, Suvrath; Van Eyken, Julian; Dewitt, Curtis; Friedman, Jerry; Ren, Deqing.

In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 5492, No. PART 2, 24.12.2004, p. 711-718.

Research output: Contribution to journalConference article

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AU - Mahadevan, Suvrath

AU - Van Eyken, Julian

AU - Dewitt, Curtis

AU - Friedman, Jerry

AU - Ren, Deqing

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