J/A+A/553/A27 Radial velocities of the HgMn star HD 11733 (Korhonen+, 2013)
Chemical surface inhomogeneities in late B-type stars with Hg and Mn
peculiarity.
I. Spot evolution in HD 11753 on short and long time scales.
Korhonen H., Gonzalez J.F., Briquet M., Flores Soriano, M., Hubrig S.,
Savanov I., Hackman T., Ilyin I.V., Eulaers E., and Pessemier W.
<Astron. Astrophys. 553, A27 (2013)>
=2013A&A...553A..27K 2013A&A...553A..27K
ADC_Keywords: Stars, double and multiple ; Stars, B-type ; Radial velocities ;
Spectroscopy
Keywords: stars: abundances - stars: chemical peculiar -
stars: individual: HD 11753 - stars: variables: general
Abstract:
Time series of high-resolution spectra of the late B-type star
HD 11753 exhibiting HgMn chemical peculiarity are used to study the
surface distribution of different chemical elements and their temporal
evolution. High-resolution and high signal-to-noise ratio spectra were
obtained using the CORALIE spectrograph at La Silla in 2000, 2009, and
2010. Surface maps of YII, SrII, TiII, and CrII were calculated using
the Doppler imaging technique. The results were also compared to
equivalent width measurements. The evolution of chemical spots both on
short and long time scales were investigated. We determine the binary
orbit of HD 11753 and fine-tune the rotation period of the primary.
The earlier discovered fast evolution of the chemical spots is
confirmed by an analysis using both the chemical spot maps and
equivalent width measurements. In addition, a long-term decrease in
the overall YII and SrII abundances is discovered. A detailed analysis
of the chemical spot configurations reveals some possible evidence
that a very weak differential rotation is operating in HD 11753.
Description:
Radial velocities of HgMn star HD 11753 are presented. The
measurements obtained from high resolution observations for the 153
CORALIE spectra, five FEROS spectra, and 13 HARPS spectra are
presented together with two mid-resolution spectra obtained with the
REOSC. The radial velocities were measured by cross-correlations using
a synthetic spectrum for Teff=11000K and logg=4.0 as template. For
each measurement Heliocentric Julian Date (HJD-2400000), orbital
phase, radial velocity measurement, error of the measurement, residual
observed-minus-calculated and the instrument information are given.
Objects:
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RA (2000) DE Designation(s)
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01 54 22.03 -42 29 49.0 HD 11753 = phi Phe
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rv.dat 36 173 Radial velocities of HD 11753
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Byte-by-byte Description of file: rv.dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 d HJD Heliocentric Julian Date (HJD-2400000)
12- 17 F6.4 --- Phase Orbital phase
19- 23 F5.2 km/s RV Radial velocity measurement
25- 28 F4.2 km/s e_RV Error of the measurement
30- 34 F5.2 km/s O-C Residual observed-minus-calculated
36 A1 --- Inst [HCFR] Instrument information (1)
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Note (1): Instrument flag as follows:
H = HARPS
C = CORALIE
F = FEROS
R = REOSC
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Acknowledgements:
Heidi Korhonen, heidi.korhonen(at)nbi.ku.dk
(End) H. Korhonen [Univ. Copenhagen, Denmark], P. Vannier [CDS] 28-Feb-2013