Design and construction of absorption cells for precision radial velocities in the K band using methane isotopologues

Guillem Anglada-Escudé, Peter Plavchan, Sean Mills, Peter Gao, Edgardo García-Berríos, Nathan S Lewis, Keeyoon Sung, David Ciardi, Chas Beichman, Carolyn Brinkworth, John Johnson, Cassy Davison, Russel White, Lisa Prato

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

We present a method to optimize absorption cells for precise wavelength calibration in the nearinfrared. We apply it to design and optimize methane isotopologue cells for precision radial velocity measurements in the K band. We also describe the construction and installation of two such cells for the CSHELL spectrograph at NASA's IRTF. We have obtained their high-resolution laboratory spectra, which we can then use in precision radial velocity measurements and which can also have other applications. In terms of obtainable RV precision, methane should outperform other proposed cells, such as the ammonia cell ( 14NH 3) recently demonstrated on CRIRES/VLT. The laboratory spectra of the ammonia and methane cells show strong absorption features in the H band that could also be exploited for precision Doppler measurements. We present spectra and preliminary radial velocity measurements obtained during our first-light run. These initial results show that a precision down to 20-30 m s -1 can be obtained using a wavelength interval of only 5 nm in the K band and S=N ~ 150. This supports the prediction that a precision down to a few meters per second can be achieved on late-M dwarfs using the new generation of NIR spectrographs, thus enabling the detection of terrestrial planets in their habitable zones. Doppler measurements in the NIR can also be used to mitigate the radial velocity jitter due to stellar activity, enabling more efficient surveys on young active stars.

Original languageEnglish
Pages (from-to)586-597
Number of pages12
JournalPublications of the Astronomical Society of the Pacific
Volume124
Issue number916
DOIs
Publication statusPublished - Jun 2012

Fingerprint

extremely high frequencies
radial velocity
methane
cells
velocity measurement
spectrographs
ammonia
stellar activity
wavelength
terrestrial planets
wavelengths
installing
planet
calibration
intervals
stars
vibration
high resolution
prediction
predictions

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Design and construction of absorption cells for precision radial velocities in the K band using methane isotopologues. / Anglada-Escudé, Guillem; Plavchan, Peter; Mills, Sean; Gao, Peter; García-Berríos, Edgardo; Lewis, Nathan S; Sung, Keeyoon; Ciardi, David; Beichman, Chas; Brinkworth, Carolyn; Johnson, John; Davison, Cassy; White, Russel; Prato, Lisa.

In: Publications of the Astronomical Society of the Pacific, Vol. 124, No. 916, 06.2012, p. 586-597.

Research output: Contribution to journalArticle

Anglada-Escudé, G, Plavchan, P, Mills, S, Gao, P, García-Berríos, E, Lewis, NS, Sung, K, Ciardi, D, Beichman, C, Brinkworth, C, Johnson, J, Davison, C, White, R & Prato, L 2012, 'Design and construction of absorption cells for precision radial velocities in the K band using methane isotopologues', Publications of the Astronomical Society of the Pacific, vol. 124, no. 916, pp. 586-597. https://doi.org/10.1086/666489
Anglada-Escudé, Guillem ; Plavchan, Peter ; Mills, Sean ; Gao, Peter ; García-Berríos, Edgardo ; Lewis, Nathan S ; Sung, Keeyoon ; Ciardi, David ; Beichman, Chas ; Brinkworth, Carolyn ; Johnson, John ; Davison, Cassy ; White, Russel ; Prato, Lisa. / Design and construction of absorption cells for precision radial velocities in the K band using methane isotopologues. In: Publications of the Astronomical Society of the Pacific. 2012 ; Vol. 124, No. 916. pp. 586-597.
@article{39fccd90c8ec4625b79f75e21cc3b3d5,
title = "Design and construction of absorption cells for precision radial velocities in the K band using methane isotopologues",
abstract = "We present a method to optimize absorption cells for precise wavelength calibration in the nearinfrared. We apply it to design and optimize methane isotopologue cells for precision radial velocity measurements in the K band. We also describe the construction and installation of two such cells for the CSHELL spectrograph at NASA's IRTF. We have obtained their high-resolution laboratory spectra, which we can then use in precision radial velocity measurements and which can also have other applications. In terms of obtainable RV precision, methane should outperform other proposed cells, such as the ammonia cell ( 14NH 3) recently demonstrated on CRIRES/VLT. The laboratory spectra of the ammonia and methane cells show strong absorption features in the H band that could also be exploited for precision Doppler measurements. We present spectra and preliminary radial velocity measurements obtained during our first-light run. These initial results show that a precision down to 20-30 m s -1 can be obtained using a wavelength interval of only 5 nm in the K band and S=N ~ 150. This supports the prediction that a precision down to a few meters per second can be achieved on late-M dwarfs using the new generation of NIR spectrographs, thus enabling the detection of terrestrial planets in their habitable zones. Doppler measurements in the NIR can also be used to mitigate the radial velocity jitter due to stellar activity, enabling more efficient surveys on young active stars.",
author = "Guillem Anglada-Escud{\'e} and Peter Plavchan and Sean Mills and Peter Gao and Edgardo Garc{\'i}a-Berr{\'i}os and Lewis, {Nathan S} and Keeyoon Sung and David Ciardi and Chas Beichman and Carolyn Brinkworth and John Johnson and Cassy Davison and Russel White and Lisa Prato",
year = "2012",
month = "6",
doi = "10.1086/666489",
language = "English",
volume = "124",
pages = "586--597",
journal = "Publications of the Astronomical Society of the Pacific",
issn = "0004-6280",
publisher = "University of Chicago",
number = "916",

}

TY - JOUR

T1 - Design and construction of absorption cells for precision radial velocities in the K band using methane isotopologues

AU - Anglada-Escudé, Guillem

AU - Plavchan, Peter

AU - Mills, Sean

AU - Gao, Peter

AU - García-Berríos, Edgardo

AU - Lewis, Nathan S

AU - Sung, Keeyoon

AU - Ciardi, David

AU - Beichman, Chas

AU - Brinkworth, Carolyn

AU - Johnson, John

AU - Davison, Cassy

AU - White, Russel

AU - Prato, Lisa

PY - 2012/6

Y1 - 2012/6

N2 - We present a method to optimize absorption cells for precise wavelength calibration in the nearinfrared. We apply it to design and optimize methane isotopologue cells for precision radial velocity measurements in the K band. We also describe the construction and installation of two such cells for the CSHELL spectrograph at NASA's IRTF. We have obtained their high-resolution laboratory spectra, which we can then use in precision radial velocity measurements and which can also have other applications. In terms of obtainable RV precision, methane should outperform other proposed cells, such as the ammonia cell ( 14NH 3) recently demonstrated on CRIRES/VLT. The laboratory spectra of the ammonia and methane cells show strong absorption features in the H band that could also be exploited for precision Doppler measurements. We present spectra and preliminary radial velocity measurements obtained during our first-light run. These initial results show that a precision down to 20-30 m s -1 can be obtained using a wavelength interval of only 5 nm in the K band and S=N ~ 150. This supports the prediction that a precision down to a few meters per second can be achieved on late-M dwarfs using the new generation of NIR spectrographs, thus enabling the detection of terrestrial planets in their habitable zones. Doppler measurements in the NIR can also be used to mitigate the radial velocity jitter due to stellar activity, enabling more efficient surveys on young active stars.

AB - We present a method to optimize absorption cells for precise wavelength calibration in the nearinfrared. We apply it to design and optimize methane isotopologue cells for precision radial velocity measurements in the K band. We also describe the construction and installation of two such cells for the CSHELL spectrograph at NASA's IRTF. We have obtained their high-resolution laboratory spectra, which we can then use in precision radial velocity measurements and which can also have other applications. In terms of obtainable RV precision, methane should outperform other proposed cells, such as the ammonia cell ( 14NH 3) recently demonstrated on CRIRES/VLT. The laboratory spectra of the ammonia and methane cells show strong absorption features in the H band that could also be exploited for precision Doppler measurements. We present spectra and preliminary radial velocity measurements obtained during our first-light run. These initial results show that a precision down to 20-30 m s -1 can be obtained using a wavelength interval of only 5 nm in the K band and S=N ~ 150. This supports the prediction that a precision down to a few meters per second can be achieved on late-M dwarfs using the new generation of NIR spectrographs, thus enabling the detection of terrestrial planets in their habitable zones. Doppler measurements in the NIR can also be used to mitigate the radial velocity jitter due to stellar activity, enabling more efficient surveys on young active stars.

UR - http://www.scopus.com/inward/record.url?scp=84863336512&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863336512&partnerID=8YFLogxK

U2 - 10.1086/666489

DO - 10.1086/666489

M3 - Article

VL - 124

SP - 586

EP - 597

JO - Publications of the Astronomical Society of the Pacific

JF - Publications of the Astronomical Society of the Pacific

SN - 0004-6280

IS - 916

ER -