J/MNRAS/431/1005 IC 2391 and Argus young stars (de Silva+, 2013)
Search for associations containing young stars: chemical tagging IC 2391 and
the Argus association.
de Silva G.M., D'Orazi V., Melo C., Torres C.A.O., Gieles M., Quast G.R.,
Sterzik M.
<Mon. Not. R. Astron. Soc., 431, 1005-1018 (2013)>
=2013MNRAS.431.1005D 2013MNRAS.431.1005D
ADC_Keywords: Associations, stellar ; YSOs ; Abundances
Keywords: stars: abundances - open clusters and associations: general -
open clusters and associations: individual:
IC 2391 and Argus association
Abstract:
We explore the possible connection between the open cluster IC 2391
and the unbound Argus association identified by the search for
associations containing young stars survey. In addition to common
kinematics and ages between these two systems, here we explore their
chemical abundance patterns to confirm if the two substructures shared
a common origin. We carry out a homogeneous high-resolution elemental
abundance study of eight confirmed members of IC 2391 as well as six
members of the Argus association using UVES spectra. We derive
spectroscopic stellar parameters and abundances for Fe, Na, Mg, Al,
Si, Ca, Ti, Cr, Ni and Ba.
All stars in the open cluster and Argus association were found to
share similar abundances with the scatter well within the
uncertainties, where [Fe/H]=-0.04±0.03 for cluster stars and
[Fe/H]=-0.06±0.05 for Argus stars. Effects of
overionization/excitation were seen for stars cooler than roughly
5200K as previously noted in the literature. Also, enhanced Ba
abundances of around 0.6dex were observed in both systems. The common
ages, kinematics and chemical abundances strongly support the fact
that the Argus association stars originated from the open cluster IC
2391. Simple modelling of this system finds this dissolution to be
consistent with two-body interactions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 167 32 Revised list of high-probability members for
the Argus association
table2.dat 135 33 Revised list of high-probability members
proposed for the open cluster IC 2391
table4.dat 188 16 Stellar parameters and abundances
tablea1.dat 36 287 Atomic Line list
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See also:
J/A+A/372/862 : Lithium abundances in IC 2602 and IC 2391 (Randich+, 2001)
J/A+A/461/509 : Membership and spectroscopy of IC 2391 (PPM) (Platais+, 2007)
J/A+A/531/A143 : Rotational velocities of HR stars (Diaz+, 2011)
J/AcA/62/67 : ASAS photometry of ROSAT sources (Kiraga, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- N [*+] New member or more data (G1)
3- 17 A15 --- Name Name
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 28 F4.1 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign (J2000)
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 38 I2 arcsec DEs Declination (J2000)
40- 45 F6.1 mas/yr pmRA Proper motion along RA
46 A1 --- n_pmRA [i] i: proper motion from literature (2)
48- 53 F6.1 mas/yr pmDE Proper motion along DE
54 A1 --- n_pmDE [i] i: proper motion from literature (2)
56- 60 F5.1 km/s RV Radial velocity
61 A1 --- n_RV [i] i: RV from literature (2)
63- 67 F5.1 km/s vsini ? Rotational velocity
68 A1 --- n_vsini [i] i: vsini from literature (2)
70- 77 F8.6 d Per ? Photometric period
78 A1 --- n_Per [i] i: Per from literature (2)
80- 84 F5.2 mag Vmag Johnson V magnitude
85 A1 --- n_Vmag [i] i: photometry from literature (2)
87- 90 F4.2 mag V-Ic ? Johnson-Cousins V-Ic colour index
91 A1 --- n_V-Ic [i] i: photometry from literature (2)
93- 98 A6 --- SpT MK spectral type
99 A1 --- n_SpT [i] i: SpT from literature (2)
101-103 I3 0.1nm EWLi ? Li equivalent width
104 A1 --- n_EWLi [i] i: EWLi from literature (2)
106-110 F5.1 mas plx Kinematical parallax
111 A1 --- n_plx [i] i: plx from literature (2)
113-117 F5.1 km/s U Heliocentric velocity towards Gal. center
119-123 F5.1 km/s V Heliocentric velocity towards Gal. rotation
125-128 F4.1 km/s W Heliocentric velocity towards N. Gal. Pole
130-134 F5.1 pc X Heliocentric distance towards Gal. center
136-141 F6.1 pc Y Heliocentric distance towards Gal. rotation
143-147 F5.1 pc Z Heliocentric distance towards N. Gal. Pole
149-152 F4.2 d Mmb [0/1] Membership probability
154-161 A8 --- Ref References (3)
163-167 A5 --- Notes Notes
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Note (2): i indicates data from the literature with the reference in Ref file.
Note (3): References as follows:
H = data from Hipparcos, Cat. I/239
T = data from TYCHO, Cat. I/239
K = data from Kiraga (2012, J/AcA/62/67)
1 = Riedel et al. (2011AJ....142..104R 2011AJ....142..104R)
2 = Desidera et al. (2011A&A...529A..54D 2011A&A...529A..54D)
3 = SB1, Porb = 613.9d, Guenther et al. (2007A&A...467.1147G 2007A&A...467.1147G)
4 = Covino et al. (1997A&A...328..187C 1997A&A...328..187C)
5 = Brown dwarf at 6.7 arcsec Huelamo et al. (2010A&A...521L..54H 2010A&A...521L..54H)
6 = Zuckerman et al. (2011ApJ...732...61Z 2011ApJ...732...61Z)
7 = Diaz et al. (2011, Cat. J/A+A/531/A143)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- N [*+] New member or more data (G1)
3- 5 A3 --- --- [PMM]
7- 10 I4 --- PMM Identification in Platais et al. 2007, Cat.
J/A+A/461/509, <Cl* IC 2391 PMM NNNN> in Simbad
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 21 F4.1 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 31 I2 arcsec DEs Declination (J2000)
33- 37 F5.1 mas/yr pmRA Proper motion along RA
38 A1 --- r_pmRA [PU] U: from UCAC4 (I/322),
P: from Platais et al. (2007, J/A+A/461/509)
40- 43 F4.1 mas/yr pmDE Proper motion along DE
44 A1 --- r_pmDE [PU] U: from UCAC4 (I/322),
P: from Platais et al. (2007, J/A+A/461/509)
46- 49 F4.1 km/s RV Radial velocity
51- 54 F4.1 km/s vsini ? Rotational velocity
56- 60 F5.3 d Per ? Photometric period
61 A1 --- n_Per [i] i: Per from literature (2)
63- 67 F5.2 mag Vmag Johnson V magnitude
68 A1 --- n_Vmag [i] i: photometry from literature (2)
70- 73 F4.2 mag CI ? Johnson B-V color index, or V-Ic (see n_B-V)
74 A1 --- n_CI [*] *: V-Ic color index in CI
76- 80 A5 --- SpT MK spectral type
81 A1 --- n_SpT [i] i: SpT from literature (2)
83- 85 I3 0.1nm EWLi ? Li equivalent width
87- 89 F3.1 mas plx Kinematical parallax
91- 95 F5.1 km/s U Heliocentric velocity towards Gal. center
97-101 F5.1 km/s V Heliocentric velocity towards Gal. rotation
103-106 F4.1 km/s W Heliocentric velocity towards N. Gal. Pole
108-111 F4.1 pc X Heliocentric distance towards Gal. center
113-118 F6.1 pc Y Heliocentric distance towards Gal. rotation
120-124 F5.1 pc Z Heliocentric distance towards N. Gal. Pole
126-129 F4.2 d Mmb [0/1] Membership probability
131-135 A5 --- Ref References (3)
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Note (2): Data mainly from Platais et al. (2007, Cat. J/A+A/461/509);
other are indicated by 'i' with the reference in Ref column.
Note (3): References as follows:
K = data from Kiraga (2012, Cat. J/AcA/62/67)
1 = Desidera et al. (2011A&A...529A..54D 2011A&A...529A..54D)
2 = Patten & Simon (1996ApJS..106..489P 1996ApJS..106..489P)
3 = SB2, Porb=90.617d, Platais et al. (2007, Cat. J/A+A/461/509)
4 = Randich et al. (2001, Cat. J/A+A/372/862)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 7 A7 ---- Field Field (IC 2391 or ARGUS)
9- 23 A15 --- Name Star name (1)
25- 28 F4.1 km/s RV ? Radial velocity
30- 34 F5.2 km/s Vsini ? Rotational velocity
36- 39 I4 K Teff ? Effective temperature
41- 43 F3.1 [cm/s2] logg ? Surface gravity
45- 47 F3.1 km/s vturb ? Microturbulent velocity ξ
49- 53 F5.2 [Sun] [FeI/H] Abundance [FeI/H]
55- 58 F4.2 [Sun] e_[FeI/H] rms uncertainty on [FeI/H]
60- 64 F5.2 [Sun] [FeII/H] ?=- Abundance [FeII/H]
66- 69 F4.2 [Sun] e_[FeII/H] ? rms uncertainty on [FeII/H]
71- 75 F5.2 [Sun] [Na/Fe] Abundance [Na/Fe]
77- 80 F4.2 [Sun] e_[Na/Fe] rms uncertainty on [Na/Fe]
82- 86 F5.2 [Sun] [Mg/Fe] Abundance [Mg/Fe]
88- 91 F4.2 [Sun] e_[Mg/Fe] rms uncertainty on [Mg/Fe]
93- 97 F5.2 [Sun] [Al/Fe] ?=- Abundance [Al/Fe]
99-102 F4.2 [Sun] e_[Al/Fe] ? rms uncertainty on [Al/Fe]
104-108 F5.2 [Sun] [Si/Fe] Abundance [Si/Fe]
110-113 F4.2 [Sun] e_[Si/Fe] rms uncertainty on [Si/Fe]
115-119 F5.2 [Sun] [Ca/Fe] Abundance [Ca/Fe]
121-124 F4.2 [Sun] e_[Ca/Fe] rms uncertainty on [Ca/Fe]
126-130 F5.2 [Sun] [TiI/Fe] Abundance [TiI/Fe]
132-135 F4.2 [Sun] e_[TiI/Fe] rms uncertainty on [TiI/Fe]
137-141 F5.2 [Sun] [TiII/Fe] Abundance [TiII/Fe]
143-146 F4.2 [Sun] e_[TiII/Fe] rms uncertainty on [TiII/Fe]
148-152 F5.2 [Sun] [CrI/Fe] Abundance [CrI/Fe]
154-157 F4.2 [Sun] e_[CrI/Fe] rms uncertainty on [CrI/Fe]
159-162 F4.2 [Sun] [CrII/Fe] Abundance [CrII/Fe]
164-167 F4.2 [Sun] e_[CrII/Fe] rms uncertainty on [CrII/Fe]
169-173 F5.2 [Sun] [Ni/Fe] Abundance [Ni/Fe]
175-178 F4.2 [Sun] e_[Ni/Fe] rms uncertainty on [Ni/Fe]
180-183 F4.2 [Sun] [BaII/Fe] Abundance [BaII/Fe]
185-188 F4.2 [Sun] e_[BaII/Fe] rms uncertainty on [BaII/Fe]
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Note (1): Avg for Average values of the Field. see Section 3.4 for details on
the computation of the average values.
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- El Element and ionisation stage
6- 8 I3 --- A [134/138]? Isotope (for Ba)
10- 17 F8.3 0.1nm lambda Wavelength λ
19- 23 F5.3 eV EP Energy potential
25- 30 F6.3 [-] loggf Oscillator strength
32- 36 F5.1 0.1pm EW ? Equivalent width for PMM3359
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Global notes:
Note (G1): Notes as follows:
* = new inclusions previously not listed by Torres et al. (2008, Young
Nearby Loose Associations. Reipurth B., editor. 2008. p. 757).
+ = data in table4.dat
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History:
* 17-Feb-2014: From electronic version of the journal
* 22-May-2014: Position of PMM 8415 in table2 corrected
(End) Patricia Vannier [CDS] 17-Jan-2014