Title

A New Gas Cell For High-Precision Doppler Measurements In The Near-Infrared

Keywords

Instrumentation: spectrographs; Stars: low-mass; Techniques: radial velocities

Abstract

High-resolution spectroscopy in the near-infrared could become the leading method for discovering extra-solar planets around very low mass stars and brown dwarfs. In order to help to achieve an accuracy of ∼ m s-1, we are developing a gas cell which consists of a mixture of gases whose absorption spectral lines span all over the near-infrared region. We present the most promising mixture, made of acetylene, nitrous oxide, ammonia, chloromethanes, and hydrocarbons. The mixture is contained in a small size 13cm long gas cell and covers most of the H and K bands. It also shows small absorptions in the J band, but they are few and not sharp enough for near-infrared wavelength calibration. We describe the working method and experiments, and compare our results with the state of the art for near-infrared gas cells. © 2010. The American Astronomical Society. All rights reserved.

Publication Date

1-1-2010

Publication Title

Astrophysical Journal

Volume

715

Issue

2

Number of Pages

1366-1369

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0004-637X/715/2/1366

Socpus ID

77952804874 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77952804874

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