J/A+A/535/A39 Radial velocity survey toward NGC 6253 (Montalto+, 2011)
VLT multi-epoch radial velocity survey toward NGC 6253. Analysis of three
transiting planetary candidates.
Montalto M., Villanova S., Koppenhoefer J., Piotto G., Desidera S.,
De Marchi F., Poretti E., Bedin L.R., Saviane I.
<Astron. Astrophys., 535, A39 (2011)>
=2011A&A...535A..39M 2011A&A...535A..39M
ADC_Keywords: Clusters, open ; Radial velocities ; Velocity dispersion
Keywords: planetary systems - techniques: radial velocities -
open cluster and associations: individual: NGC 6253
Abstract:
One of the most metal-rich open cluster of the Galaxy, NGC 6253 is a
target of special interest in the search for extrasolar planets, the
study of stellar populations, and the chemical/dynamical evolution of
the Galactic disk.
We present the results of two photometric campaigns and a VLT
multi-epoch radial velocity survey toward the open cluster NGC 6253.
We complement our analysis with photometric, proper motion, and radial
velocity data available from previous studies of this cluster, and
analyze three planetary candidates found in the field of NGC 6253.
Description:
We derived homogeneous radial velocity measurements for stars located
at the turn-off, sub-giant, red-giant branch, red-clump, and blue
straggler regions of the cluster. We also analyzed a comparison sample
of surrounding field stars. Spectra were obtained with the UVES and
GIRAFFE spectrographs at the VLT during three epochs in August 2008.
The photometric data that appear in this work are based on two major
photometric campaigns conducted at the 2.2m La Silla Telescope in 2004
and 2009 respectively.
The 2004 photometric campaign was conducted during June 2004 (program
ID:073.C-0227[A]).
In April 2009, we used the 2.2m Telescope in La Silla for 14 consecutive
nights between 1-14 April during Max Planck Institute for
Extraterrestrial Physics reserved time (program ID:083.A-9001[A]).
Only part of the time was allocated to NGC 6253 observations
The spectroscopic observations were obtained using the FLAMES facility
at the UT2 (Kueyen telescope), in Paranal, Chile. The data were
obtained during three nights between August 17, 2008 and August 25,
2008.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table9.dat 111 36 Proper motion cluster members stars
table10.dat 111 103 Proper motion non members or stars with
doubtful/undefined proper motions
table11.dat 61 139 ID cross-correlation table
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See also:
J/A+A/505/1129 : BVRIJHK and proper motions in NGC 6253 (Montalto+, 2009)
J/A+A/509/A17 : R light curves of NGC 6253 variables (De Marchi+, 2010)
Byte-by-byte Description of file: table9.dat table10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- [MPD2009] ? Identification number of Montalto et al.
(2009, Cat. J/A+A/505/1129)
7 A1 --- n_[DPM2010] [*] Individual note (1)
8- 14 A7 --- [DPM2010] Identification number of de Marchi et al.
(2010, Cat. J/A+A/509/A17).
16- 28 F13.9 deg RAdeg Right ascension in decimal degrees (J2000)
30- 42 F13.9 deg DEdeg Declination in decimal degrees (J2000)
44- 49 F6.3 mag Vmag V magnitude
51- 56 F6.3 mag Rmag ?=- R magnitude
57 A1 --- n_Rmag [*] Photometry from Bragaglia et al. (2)
58- 62 F5.3 mag B-R ?=- B-R color index
63 A1 --- n_B-R [*] Photometry from Bragaglia et al. (2)
64- 71 F8.3 km/s Mean observed radial velocity of the star
73- 79 F7.3 km/s sigma Observed dispersion of the radial velocity
measurements
81- 87 F7.3 --- Rsigma Ratio of the observed radial velocity
dispersion to the dispersion threshold for
binary detection (σobs/<{sigmaobs}>)
89- 90 I2 % Mpm ?=- Proper motion membership probability
92- 98 A7 --- Class Star classification code (3)
100 I1 --- Bin [0/1] binarity index (4)
102 A1 --- Inst [UG] Spectrograph used to study the star,
either UVES (U), or GIRAFFE (G)
104-109 F6.3 arcmin Dist Projected radial distance from the cluster
center
111 I1 --- N Number of measurements obtained
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Note (1): Star 30341 is a very likely field star sharing the same proper
motion of cluster members, as discussed in Sect. 5.
Note (2): The R band magnitude for star 45410 and the B-V color of star 45368
are taken from Bragaglia et al. (1997MNRAS.284..477B 1997MNRAS.284..477B, see text).
Note (3): Classification code as follows:
MS = main sequence
SGB = subgiant branch
RGB = red-giant branch
RC = red clump
BSS = blue straggler
RSCVn = RS Canum Venaticorum variable
EW = contact binary
EA = Algol variable, detached system
LON = Long period variable >10days
RO1 = rotational variable, see De Marchi et al., 2010 (Cat. J/A+A/509/A17)
RO2 = rotational variable, see De Marchi et al., 2010 (Cat. J/A+A/509/A17)
RR = RR Lyrae variable
DSCT = δ Scuti variable
TRS = transiting planetary candidate
Note (4): Binarity code as follows:
1 = if, on the basis only of our own radial velocities, the star is
considered a binary
0 = if it is considered a single star
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Byte-by-byte Description of file: table11.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- [MPD2009] ? Numbering of Montalto et al.
(2009, Cat. J/A+A/505/1129)
8- 14 A7 --- [DPM2010] Numbering of De Marchi et al.
(2010, Cat. J/A+A/509/A17)
16- 19 I4 --- WEBDA ? Numbering of the WEBDA
(http://www.univie.ac.at/webda)
21- 61 A41 --- Ref Reference for those stars that have already
been spectroscopically studied by other authors
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Jan-2012