J/A+A/569/A17 Gaia-ESO Survey: NGC6705 (Cantat-Gaudin+, 2014)
The Gaia-ESO Survey:
Stellar content and elemental abundances in the massive cluster NGC6705.
Cantat-Gaudin T., Vallenari A., Zaggia S., Bragaglia A., Sordo R.,
Drew J.E., Eisloeffel J., Farnhill H.J., Gonzalez-Solares E., Greimel R.,
Irwin M.J., Kupcu-Yoldas A., Jordi C., Blomme R., Sampedro L., Costado M.T.,
Alfaro E., Smiljanic R., Magrini L., Donati P., Friel E.D., Jacobson H.,
Abbas U., Hatzidimitriou D., Spagna A., Vecchiato A., Balaguer-Nunez L.,
Lardo C., Tosi M., Pancino E., Klutsch A., Tautvaisiene G., Drazdauskas A.,
Puzeras E., Jimenez-Esteban F., Maiorca E., Geisler D., San I.,
Villanova S., Gilmore G., Randich S., Bensby T., Flaccomio E., Lanzafame A.,
Recio-Blanco A., Damiani F., Hourihane A., Jofre P., deLaverny P.,
Masseron T., Morbidelli L., Prisinzano L., Sacco G.G., Sbordone L.,
Worley C.C.
<Astron. Astrophys. 569, A17 (2014)>
=2014A&A...569A..17C 2014A&A...569A..17C
ADC_Keywords: Clusters, open ; Photometry, UBV ; Radial velocities
Keywords: stars: abundances - open clusters and associations: general -
open clusters and associations: individual: NGC 6705
Abstract:
Chemically inhomogeneous populations are observed in most globular
clusters, but not in open clusters. Cluster mass seems to play a key
role in the existence of multiple populations.
Studying the chemical homogeneity of the most massive open clusters is
needed to better understand the mechanism of their formation and
determine the mass limit under which clusters cannot host multiple
populations. Here we studied NGC 6705, which is a young and massive
open cluster located towards the inner region of the Milky Way. This
cluster is located inside the solar circle. This makes it an important
tracer of the inner disk abundance gradient.
This study makes use of BVI and ri photometry and comparisons with
theoretical isochrones to derive the age of NGC 6705. We study the
density profile of the cluster and the mass function to infer the
cluster mass. Based on abundances of the chemical elements distributed
in the first internal data release of the Gaia-ESO Survey, we study
elemental ratios and the chemical homogeneity of the red clump stars.
Radial velocities enable us to study the rotation and internal
kinematics of the cluster.
Description:
We combine new BV photometry with the spectroscopic observations of
the Gaia-ESO Survey to study the open cluster NGC6 705. 1028 stars
were observed with the HR15n grating of the GIRAFFE instrument at
VLT/UT2. The radial velocities obtained for those stars were used to
derive membership probabilities.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 67 1028 Positions, BV photometry, radial velocities and
membership probabilities
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See also:
I/324 : The Initial Gaia Source List (IGSL) (Smart, 2013)
VI/137 : GaiaSimu Universe Model Snapshot (Robin+, 2012)
J/A+A/561/A94 : Velocities and photometry in Trumpler 20 (Donati+, 2014)
J/A+A/563/A94 : Kinematics of the Gamma Vel cluster (Jeffries+, 2014)
J/A+A/566/A50 : Classification of stellar spectra 6440-6810Å (Damiani+ 2014)
J/A+AS/128/255 : Proper motions in M 11 (Su+ 1998)
J/MNRAS/310/982 : UBVI CCD Photometry of M11 - II. (Sung+ 1999)
J/A+A/412/721 : CCD Δa-photometry of 5 open clusters (Paunzen+, 2003)
J/PASP/119/1233 : BV photometry of M11 stars (Koo+, 2007)
J/A+A/513/A29 : RACE-OC project: M11 (NGC6705) (Messina+, 2010)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- idGES Identification index of the Gaia-ESO Survey
(HHMMSSss+DDMMSSs, ICRS)
18- 26 F9.5 deg RAdeg Right Ascension coordinate J2000
28- 35 F8.5 deg DEdeg Declination coordinate J2000
37- 42 F6.3 mag Bmag [11.7/20.7] B magnitude
44- 49 F6.3 mag Vmag [10.8/19.1] V magnitude
51- 56 F6.2 km/s RV [-79/335] Radial velocity from Giraffe-HR15n
spectra (476-684nm)
58- 62 F5.2 km/s e_RV [0.25/21] Error on RV
64- 67 F4.2 --- Pmemb [0/1] Membership probability
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Acknowledgements:
Tristan Cantat-Gaudin, tristan.cantat(at)oapd.inaf.it
(End) Tristan Cantat-Gaudin [OAPD, Italy], Patricia Vannier [CDS] 07-Jul-2014