2010A&A...511A..55F


Query : 2010A&A...511A..55F

2010A&A...511A..55F - Astronomy and Astrophysics, volume 511, A55-55 (2010/2-2)

Radial velocities with CRIRES . Pushing precision down to 5-10 m/s.

FIGUEIRA P., PEPE F., MELO C.H.F., SANTOS N.C., LOVIS C., MAYOR M., QUELOZ D., SMETTE A. and UDRY S.

Abstract (from CDS):

With the advent of high-resolution infrared spectrographs, radial relocity (RV) searches enter into a new domain. As of today, the most important technical question to address is which wavelength reference is the most suitable for high-precision RV measurements. In this work we use atmospheric absorption features as wavelength reference on CRIRES data obtained on two programs and three different targets. We analyzed the data from the TWHya campaign again, reaching a dispersion of about 6m/s on the RV standard on a time scale of roughly 1 week. We confirm that there is a low-amplitude RV signal on TWHya itself, with an amplitude roughly 3 times smaller than the one reported at visible wavelengths. We present RV measurements of Gl86 as well, showing that our approach is capable of detecting the signal induced by a planet and correctly quantifying it. Our data show that CRIRES is capable of reaching an RV precision of less than 10m/s on a time scale of one week. The limitations of this particular approach are discussed, along with the limiting factors on RV precision in the IR in a general way. The implications of this work on the design of future dedicated IR spectrographs are addressed as well.

Abstract Copyright:

Journal keyword(s): stars: planetary systems - infrared: stars - instrumentation: spectrographs - methods: observational - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/511/A55): table2.dat table3.dat>

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 HD 13445 PM* 02 10 25.9181700303 -50 49 25.465181208   6.945 6.117     K1.5V 435 1
2 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 1774 1
3 HD 96146 ** 11 04 54.1965538248 -35 48 16.816685832   5.430 5.414     A0V 31 0
4 HD 108309 PM* 12 26 48.1417421363 -48 54 47.499505755   6.94 6.26     G2V 155 0
5 * 51 Peg PM* 22 57 27.9804852576 +20 46 07.797040104 6.39 6.16 5.46 4.97 4.61 G2IV 1128 1

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2022.12.06-17:50:36

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