J/A+A/479/141 Iz photometry, RV and EW(Li) in IC 4665 (Manzi+, 2008)
Detection of the lithium depletion boundary in the young open cluster IC 4665.
Manzi S., Randich S., De Wit W.J., Palla F.
<Astron. Astrophys., 479, 141-148 (2008)>
=2008A&A...479..141M 2008A&A...479..141M
ADC_Keywords: Clusters, open ; Photometry ; Radial velocities ;
Equivalent widths
Keywords: open clusters and associations: individual: IC 4665 -
stars: low-mass, brown dwarfs - stars: pre-main-sequence -
stars: abundances
Abstract:
The so-called lithium depletion boundary (LDB) provides a secure and
independent tool for deriving the ages of young open clusters.
In this context, our goal is to determine membership for a sample of
147 photometrically selected candidates of the young open cluster
IC 4665 and to use confirmed members to establish an age based on the
LDB.
Employing the FLAMES multi-object spectrograph on VLT/UT2, we have
obtained intermediate-resolution spectra of the cluster candidates.
The spectra were used to measure radial velocities and to infer the
presence of the LiI 670.8nm doublet and Hα emission.
Description:
Target stars were selected from different sources: Prosser (1993, Cat.
J/AJ/105/1441), Giampapa et al. (1998ApJ...501..624G 1998ApJ...501..624G), de Wit et al.
(2006, Cat. J/A+A/448/189), and a literature search on SIMBAD.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 147 The 147 candidate members of IC 4665 observed
with FLAMES
table2.dat 32 39 Stars confirmed as members
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See also:
J/AJ/105/1441 : IC 4665 photometry and proper motions (Prosser 1993)
J/A+A/448/189 : IzJHK photometry of IC4665 (de Wit+, 2006)
J/A+A/475/539 : BV photometry and Li abundances in NGC 3960 (Prisinzano+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- MRD [1/147] Sequential number, Cl* IC 4665 MRD NNN
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 16 F6.3 s RAs Right ascension (J2000)
18 A1 --- DE- Declination sign (J2000)
19- 20 I2 deg DEd Declination (J2000)
22- 23 I2 arcmin DEm Declination (J2000)
25- 29 F5.2 arcsec DEs Declination (J2000)
31 I1 --- Ref Data source (1)
33- 45 A13 --- Name Name (2)
46 A1 --- n_Name [*] Note on Name (3)
47- 52 F6.3 mag Imag ?=- CFHT Mould Im magnitude
54- 59 F6.3 mag zmag ?=- CFHT z magnitude
61- 66 F6.1 km/s RV ?=- Radial velocity
67- 73 A7 --- n_RV Note about variability and binarity
75- 78 F4.1 km/s e_RV ?=- rms uncertainty on RV
80- 81 A2 --- Li [YN? ] Presence (Y) or lack (N) of the Li line (4)
83- 88 A6 --- Halpha [em/abs ] Presence of the Halpha line in
absorption or emission
90- 91 A2 --- Mm [YN?] Membership flag
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Note (1): Data source as follows:
1 = only in Prosser (1993, Cat. J/AJ/105/1441) or
Giampapa et al. (1998ApJ...501..624G 1998ApJ...501..624G)
2 = from Prosser (1993, Cat. J/AJ/105/1441) and
de Wit et al. (2006, Cat. J/A+A/448/189)
3 = only in de Wit et al. (2006, Cat. J/A+A/448/189)
4 = not in Prosser (1993, Cat. J/AJ/105/1441) nor in de Wit et al.
(2006, Cat. J/A+A/448/189) because brighter than the I limit
of that paper
9 = from IRAS or Luyten
Note (2): Conventions for Names:
PNNN = Cl* IC 4665 P NNN in Simbad
GPF98-R05 = [GPF98] R05 in Simbad
K057 = IC 4665 57 in Simbad
A.NN.NN.NNNN = not in Simbad
D.NN.NN.NNN = not in Simbad
Note (3): In the original table, objects No 38 and 40 have P155 in this
column, but none of them correspond to Cl* IC 4665 P 155, then the
Name have been taking out of the table by CDS (19-Jun-2008)
Note (4): "?" means that the S/N did not allow to confirm or reject the
presence of Li.
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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- 3 I3 --- MRD [1/147] Sequential number, Cl* IC 4665 MRD NNN
5- 10 F6.3 mag Imag ?=- Mould Im magnitude
12- 16 F5.3 mag I-z ?=- Mould Im-z colour index
18- 22 F5.3 mag Ic-Ks ?=- Cousins-Johnson Ic-Ks colour index (1)
24- 26 I3 0.1nm EW(Li) ?=- Li equivalent width
28- 29 I2 0.1nm e_EW(Li) ?=- rms uncertainty on EW(Li)
31- 32 A2 --- n_EW(Li) [Y? ] Note on EW(Li) when no measurement
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Note (1): The values for Ic are converted from Im.
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History:
* 11-Mar-2008: from electronic version of the journal
* 19-Jun-2008: see Note (3) above.
(End) Patricia Vannier [CDS] 11-Mar-2008