Design, Performance and Early Results from Extremely High Precision Doppler Instruments in a Global Network

被引：4

作者：

Ge, Jian ^{[1
]}

Zhao, Bo ^{[1
]}

Groot, John ^{[1
]}

Chang, Liang ^{[1
]}

Varosi, Frank ^{[1
]}

Wan, Xiaoke ^{[1
]}

Powell, Scott ^{[1
]}

Jiang, Peng ^{[1
]}

Hanna, Kevin ^{[1
]}

Wang, Ji ^{[1
]}

Pais, Rohan ^{[1
]}

Liu, Jian ^{[1
]}

Dou, Liming ^{[1
]}

Schofield, Sidney ^{[1
]}

McDowell, Shaun ^{[1
]}

Costello, Erin ^{[1
]}

Delgado-Navarro, Adriana ^{[1
]}

Fleming, Scott ^{[1
]}

Lee, Brian ^{[1
]}

Bollampally, Sandeep Reddy ^{[1
]}

Bosman, Troy ^{[1
]}

Jakeman, Hali ^{[1
]}

Fletcher, Adam ^{[1
]}

Marquez, Gabriel ^{[1
]}

机构：

[1] Univ Florida, Dept Astron, Gainesville, FL 32611 USA

来源：

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY III | 2010年 / 7735卷

关键词：

Extrasolar Planets; Survey; Doppler; Interferometers; Network; Fringing spectra; Radial Velocity; Fiber-fed; EXTRA-SOLAR PLANETS; M-CIRCLE-PLUS; HARPS SEARCH; METALLICITY; EXOPLANETS; SYSTEM;

D O I：

10.1117/12.857366

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report design, performance and early results from two of the Extremely High Precision Extrasolar Planet Tracker Instruments (EXPERT) as part of a global network for hunting for low mass planets in the next decade. EXPERT is a combination of a thermally compensated monolithic Michelson interferometer and a cross-dispersed echelle spectrograph for extremely high precision Doppler measurements for nearby bright stars (e.g., 1m/s for a V=8 solar type star in 15 min exposure). It has R=18,000 with a 72 micron slit and a simultaneous coverage of 390-694 nm. The commissioning results show that the instrument has already produced a Doppler precision of about 1 m/s for a solar type star with S/N similar to 100 per pixel. The instrument has reached similar to 4 mK (P-V) temperature stability, similar to 1 mpsi pressure stability over a week and a total instrument throughput of similar to 30% at 550 nm from the fiber input to the detector. EXPERT also has a direct cross-dispersed echelle spectroscopy mode fed with 50 micron fibers. It has spectral resolution of R=27,000 and a simultaneous wavelength coverage of 390-1000 nm.

引用

页数：12

共 18 条

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