J/A+A/547/A13 Homogeneous sample of F6-K4 Hyades stars (Tabernero+, 2012)
Chemically tagging the Hyades Supercluster:
A homogeneous sample of F6-K4 kinematically selected northern stars.
Tabernero H.M., Montes D., Gonzalez Hernandez J.I.
<Astron. Astrophys. 547, A13 (2012)>
=2012A&A...547A..13T 2012A&A...547A..13T
ADC_Keywords: Clusters, open ; Stars, late-type ; Abundances
Keywords: Galaxy: open clusters and associations: individual:
Hyades supercluster -
open clusters and associations: individual: Hyades -
stars: abundances - stars: kinematics and dynamics -
stars: late-type - stars: fundamental parameters
Abstract:
Stellar kinematic groups are kinematical coherent groups of stars that
might have a common origin. These groups are dispersed throughout the
Galaxy over time by the tidal effects of both Galactic rotation and
disc heating, although their chemical content remains unchanged. The
aim of chemical tagging is to establish that the abundances of every
element in the analysis are homogeneous among the members. We study the
case of the Hyades Supercluster to compile a reliable list of members
(FGK stars) based on our chemical tagging analysis. For a total of 61
stars from the Hyades Supercluster, stellar atmospheric parameters
(Teff, logg, ξ, and [Fe/H]) are determined using our code called
StePar, which is based on the sensitivity to the stellar atmospherics
parameters of the iron EWs measured in the spectra. We derive the
chemical abundances of 20 elements and find that their [X/Fe] ratios
are consistent with Galactic abundance trends reported in previous
studies. The chemical tagging method is applied with a carefully
developed differential abundance analysis of each candidate member of
the Hyades Supercluster, using a well-known member of the Hyades
cluster as a reference (vB 153). We find that only 28 stars (26 dwarfs
and 2 giants) are members, i.e. that 46% of our candidates are
members based on the differential abundance analysis. This result
confirms that the Hyades Supercluster cannot originate solely from the
Hyades cluster.
Description:
Spectroscopic observations were obtained at the 1.2m Mercator
Telescope at the Observatorio del Roque de los Muchachos (La Palma,
Spain) in January, May, and November 2010 with HERMES (High Efficiency
and Resolution Mercator Echelle Spectrograph).
**************************************************************************
* *
* Sorry, but the author(s) never supplied all tabular material *
* announced in the paper *
* *
**************************************************************************
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 106 61 Properties of the sample, including radial velocities
and derived kinematics
tablea2.dat 95 62 Stellar parameters for the whole sample, Fe
differential abundance, and the resulting membership
based on the abundance homogeneity criterion
(chemical tagging)
tablea3.dat 145 62 [X/Fe] ratios for the α-, Fe-peak, and odd-Z
elements: Na, Mg, Al, Si, Ca, Sc, Ti, V, Cr, Mn,
Co, and Ni
tablea4.dat 90 62 [X/Fe] ratios for the s-process elements:
Cu, Zn, Y, Zr, Ba, Ce, and Nd
tablea5.dat 145 61 Differential abundances for the α-, Fe-peak,
and odd-Z elements: Na, Mg, Al, Si, Ca, Sc, Ti, V,
Cr, Mn, Co, and Ni
tablea6.dat 90 61 Differential abundances for the s-process elements:
Cu, Zn, Y, Zr, Ba, Ce and Nd
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Star name
14- 19 I6 --- HIP HIP number (see Cat. I/239)
21- 24 F4.2 mag Vmag V magnitude
26- 33 A8 --- SpType MK spectral type
35- 36 I2 h RAh Right ascension (J2000)
38- 39 I2 min RAm Right ascension (J2000)
41- 45 F5.2 s RAs Right ascension (J2000)
47 A1 --- DE- Declination sign (J2000)
48- 49 I2 deg DEd Declination (J2000)
51- 52 I2 arcmin DEm Declination (J2000)
54- 58 F5.2 arcsec DEs Declination (J2000)
60- 65 F6.2 km/s RV Radial velocity
67- 70 F4.2 km/s e_RV rms uncertainty on RV
72- 77 F6.2 km/s Uvel U velocity
79- 82 F4.2 km/s e_Uvel rms uncertainty on Uvel
84- 89 F6.2 km/s Vvel V velocity
91- 94 F4.2 km/s e_Vvel rms uncertainty on Vvel
96-101 F6.2 km/s Wvel W velocity
103-106 F4.2 km/s e_Wvel rms uncertainty on Wvel
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Star name
15- 18 I4 K Teff Effective temperature
20- 21 I2 K e_Teff rms uncertainty on Teff
23- 26 F4.2 [cm/s2] logg Gravity surface
28- 31 F4.2 [cm/s2] e_logg rms uncertainty on logg
33- 36 F4.2 km/s Vt Microturbulent velocity ξ
38- 41 F4.2 km/s e_Vt rms uncertainty on Vt
43- 46 F4.2 [-] ab(FeI) FeI abundance logε(FeI)
48- 51 F4.2 [-] e_ab(FeI) rms uncertainty on ab(FeI)
53- 56 F4.2 [-] ab(FeII) FeII abundance logε(FeII)
58- 61 F4.2 [-] e_ab(FeII) rms uncertainty on ab(FeII)
63- 68 F6.3 [Sun] [Fe/H] Metallicity
70- 74 F5.3 [Sun] e_[Fe/H] rms uncertainty on [Fe/H]
76- 81 F6.3 [-] D[Fe/H] ?=- differential abundance Δ[Fe/H] (G1)
83- 87 F5.3 [-] e_D[Fe/H] ?=- rms uncertainty on D[Fe/H]
89 A1 --- Mm(Fe) [Y/N] Membership from Fe abundance (1)
91- 92 I2 --- Tot Number of elements satisfying homogeneity
at 1-σ
94- 95 A2 --- Mm [Y*/N ] Final membership (2)
--------------------------------------------------------------------------------
Note (1): If the star satisfies or not the Fe homogeneity criterium at 1-rms.
Note (2): "Y" or "N" if the star satisfies or not the homogeneity criterium
in all the analysed elements; Y* means that the remaining 1 or 2
elements satisfy 1.5-rms criterium but not the 1-rms.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Name
15- 19 F5.2 [-] [Na/Fe] Abundance [Na/Fe]
21- 24 F4.2 [-] e_[Na/Fe] ?=- rms uncertainty on [Na/Fe]
26- 30 F5.2 [-] [Mg/Fe] Abundance [Mg/Fe]
32- 35 F4.2 [-] e_[Mg/Fe] ?=- rms uncertainty on [Mg/Fe]
37- 41 F5.2 [-] [Al/Fe] Abundance [Al/Fe]
43- 46 F4.2 [-] e_[Al/Fe] rms uncertainty on [Al/Fe]
48- 52 F5.2 [-] [Si/Fe] Abundance [Si/Fe]
54- 57 F4.2 [-] e_[Si/Fe] rms uncertainty on [Si/Fe]
59- 63 F5.2 [-] [Ca/Fe] Abundance [Ca/Fe]
65- 68 F4.2 [-] e_[Ca/Fe] rms uncertainty on [Ca/Fe]
70- 74 F5.2 [-] [Sc/Fe] Abundance [Sc/Fe]
76- 79 F4.2 [-] e_[Sc/Fe] rms uncertainty on [Sc/Fe]
81- 85 F5.2 [-] [Ti/Fe] Abundance [Ti/Fe]
87- 90 F4.2 [-] e_[Ti/Fe] rms uncertainty on [Ti/Fe]
92- 96 F5.2 [-] [V/Fe] Abundance [V/Fe]
98-101 F4.2 [-] e_[V/Fe] rms uncertainty on [V/Fe]
103-107 F5.2 [-] [Cr/Fe] Abundance [Cr/Fe]
109-112 F4.2 [-] e_[Cr/Fe] rms uncertainty on [Cr/Fe]
114-118 F5.2 [-] [Mn/Fe] Abundance [Mn/Fe]
120-123 F4.2 [-] e_[Mn/Fe] rms uncertainty on [Mn/Fe]
125-129 F5.2 [-] [Co/Fe] Abundance [Co/Fe]
131-134 F4.2 [-] e_[Co/Fe] rms uncertainty on [Co/Fe]
136-140 F5.2 [-] [Ni/Fe] Abundance [Ni/Fe]
142-145 F4.2 [-] e_[Ni/Fe] rms uncertainty on [Ni/Fe]
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Name
15- 19 F5.2 [-] [Cu/Fe] Abundance [Cu/Fe]
21- 24 F4.2 [-] e_[Cu/Fe] ?=- rms uncertainty on [Cu/Fe]
26- 30 F5.2 [-] [Zn/Fe] Abundance [Zn/Fe]
32- 35 F4.2 [-] e_[Zn/Fe] ?=- rms uncertainty on [Zn/Fe]
37- 41 F5.2 [-] [Y/Fe] Abundance [Y/Fe]
43- 46 F4.2 [-] e_[Y/Fe] ?=- rms uncertainty on [Y/Fe]
48- 52 F5.2 [-] [Zr/Fe] Abundance [Zr/Fe]
54- 57 F4.2 [-] e_[Zr/Fe] rms uncertainty on [Zr/Fe]
59- 63 F5.2 [-] [Ba/Fe] Abundance [Ba/Fe]
65- 68 F4.2 [-] e_[Ba/Fe] rms uncertainty on [Ba/Fe]
70- 74 F5.2 [-] [Ce/Fe] Abundance [Ce/Fe]
76- 79 F4.2 [-] e_[Ce/Fe] rms uncertainty on [Ce/Fe]
81- 85 F5.2 [-] [Nd/Fe] Abundance [Nd/Fe]
87- 90 F4.2 [-] e_[Nd/Fe] ?=- rms uncertainty on [Nd/Fe]
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Name
15- 19 F5.2 [-] D[Na/H] Differential abundance Δ[Na/H] (G1)
21- 24 F4.2 [-] e_D[Na/H] ?=- rms uncertainty on D[Na/H]
26- 30 F5.2 [-] D[Mg/H] Differential abundance Δ[Mg/H] (G1)
32- 35 F4.2 [-] e_D[Mg/H] ?=- rms uncertainty on D[Mg/H]
37- 41 F5.2 [-] D[Al/H] Differential abundance Δ[Al/H] (G1)
43- 46 F4.2 [-] e_D[Al/H] rms uncertainty on D[Al/H]
48- 52 F5.2 [-] D[Si/H] Differential abundance Δ[Si/H] (G1)
54- 57 F4.2 [-] e_D[Si/H] rms uncertainty on D[Si/H]
59- 63 F5.2 [-] D[Ca/H] Differential abundance Δ[Ca/H] (G1)
65- 68 F4.2 [-] e_D[Ca/H] rms uncertainty on D[Ca/H]
70- 74 F5.2 [-] D[Sc/H] Differential abundance Δ[Sc/H] (G1)
76- 79 F4.2 [-] e_D[Sc/H] rms uncertainty on D[Sc/H]
81- 85 F5.2 [-] D[Ti/H] Differential abundance Δ[Ti/H] (G1)
87- 90 F4.2 [-] e_D[Ti/H] rms uncertainty on D[Ti/H]
92- 96 F5.2 [-] D[V/H] Differential abundance Δ[V/H] (G1)
98-101 F4.2 [-] e_D[V/H] rms uncertainty on D[V/H]
103-107 F5.2 [-] D[Cr/H] Differential abundance Δ[Cr/H] (G1)
109-112 F4.2 [-] e_D[Cr/H] rms uncertainty on D[Cr/H]
114-118 F5.2 [-] D[Mn/H] Differential abundance Δ[Mn/H] (G1)
120-123 F4.2 [-] e_D[Mn/H] rms uncertainty on D[Mn/H]
125-129 F5.2 [-] D[Co/H] Differential abundance Δ[Co/H] (G1)
131-134 F4.2 [-] e_D[Co/H] rms uncertainty on D[Co/H]
136-140 F5.2 [-] D[Ni/H] Differential abundance Δ[Ni/H] (G1)
142-145 F4.2 [-] e_D[Ni/H] rms uncertainty on D[Ni/H]
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Name
15- 19 F5.2 [-] D[Cu/Fe] Differential abundance Δ[Cu/Fe] (G1)
21- 24 F4.2 [-] e_D[Cu/Fe] ?=- rms uncertainty on D[Cu/Fe]
26- 30 F5.2 [-] D[Zn/Fe] Differential abundance Δ[Zn/Fe] (G1)
32- 35 F4.2 [-] e_D[Zn/Fe] ?=- rms uncertainty on D[Zn/Fe]
37- 41 F5.2 [-] D[Y/Fe] Differential abundance Δ[Y/Fe] (G1)
43- 46 F4.2 [-] e_D[Y/Fe] ?=- rms uncertainty on D[Y/Fe]
48- 52 F5.2 [-] D[Zr/Fe] Differential abundance Δ[Zr/Fe] (G1)
54- 57 F4.2 [-] e_D[Zr/Fe] ?=- rms uncertainty on D[Zr/Fe]
59- 63 F5.2 [-] D[Ba/Fe] Differential abundance Δ[Ba/Fe] (G1)
65- 68 F4.2 [-] e_D[Ba/Fe] ?=- rms uncertainty on D[Ba/Fe]
70- 74 F5.2 [-] D[Ce/Fe] Differential abundance Δ[Ce/Fe] (G1)
76- 79 F4.2 [-] e_D[Ce/Fe] ?=- rms uncertainty on D[Ce/Fe]
81- 85 F5.2 [-] D[Nd/Fe] Differential abundance Δ[Nd/Fe] (G1)
87- 90 F4.2 [-] e_D[Nd/Fe] ?=- rms uncertainty on D[Nd/Fe]
--------------------------------------------------------------------------------
Global Notes:
Note (G1): differential abundances Δ[X/H] are determined by comparing
with the star vB 153 (HIP 13806), which is a star known to be a member
of the Hyades.
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 01-Oct-2012