J/MNRAS/407/465 Fast-rotating M dwarfs in NGC2516 (Jackson+, 2010)
Chromospheric activity among fast-rotating M dwarfs in the open cluster NGC2516.
Jackson R.J., Jeffries R.D.
<Mon. Not. R. Astron. Soc., 407, 465-478 (2010)>
=2010MNRAS.407..465J 2010MNRAS.407..465J
ADC_Keywords: Clusters, open ; Stars, M-type ; Radial velocities ;
Equivalent widths
Keywords: stars: low-mass - stars: rotation - stars: magnetic activity -
open clusters and associations: individual: NGC 2516
Abstract:
We report radial velocities (RVs), projected equatorial velocities
(vsini) and CaII triplet (CaT) chromospheric activity indices for 237
late-K to mid-M candidate members of the young open cluster NGC 2516.
These stars have published rotation periods between 0.1 and 15d.
Intermediate-resolution spectra were obtained using the Giraffe
spectrograph at the Very Large Telescope. Membership was confirmed on
the basis of their RVs for 210 targets.
Description:
The targets were observed using the European Southern Observatory
(ESO) 8.2-m aperture VLT (UT-2 Kueyen) FLAMES fibre instrument,
feeding the Giraffe and UVES spectrographs. Between 22 and 55 of our
targets were observed with Giraffe in each of eight separate fibre
configurations, on between 2007/11/27 and 2007/12/30.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 57 9 Details of observing program 380.D-0479
table2.dat 94 237 Velocity data measured for targets in the
open cluster NGC 2516
table3.dat 83 237 Rotation periods, convective turnover times,
Rossby numbers, EWs and chromospheric activity
indices for the first two CaT lines (8498 and
8542Å) in candidate members of NGC 2516
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See also:
J/MNRAS/377/741 : VIc photometry of NGC 2516 (Irwin+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- Ref Reference number
8 I1 --- Run Run number
10- 19 A10 "YYYY-MM-DD" Obs.date Observation date
21- 25 A5 "h:m" Obs.time Star time of observation
27- 33 F7.3 deg RAdeg Field centre right ascension (J2000)
35- 41 F7.3 deg DEdeg Field centre declination (J2000)
43- 46 F4.2 arcsec Seeing Average seeing
48- 51 F4.2 --- Airmass Airmass
53- 54 I2 --- Nt Number of targets
56- 57 I2 --- Nt2 Number of new targets observed
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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- 6 A6 --- --- [N2516-]
7- 14 A8 --- [IHA2007] Source name (N-N-NNNN) (G1)
17 I1 h RAh Right ascension (J2000) (G1)
19- 20 I2 min RAm Right ascension (J2000) (G1)
22- 26 F5.2 s RAs Right ascension (J2000) (G1)
28 A1 --- DE- Declination sign (J2000) (G1)
29- 30 I2 deg DEd Declination (J2000) (G1)
32- 33 I2 arcmin DEm Declination (J2000) (G1)
35- 38 F4.1 arcsec DEs Declination (J2000) (G1)
40- 45 F6.3 d Per Period (G1)
47- 51 F5.2 mag Vmag V magnitude (2)
53- 57 F5.2 mag Imag IJ magnitude (2)
59- 63 F5.2 mag Kmag ?=- CIT K magnitude (3)
64 A1 --- n_Kmag [*] Note on Kmag (4)
66- 67 I2 --- S/N Signal-to-noise ratio
69- 73 F5.2 km/s RV Radial velocity
75- 78 F4.1 km/s e_RV rms uncertainty on RV
80 A1 --- l_vsini Limit flag on vsini
81- 85 F5.1 km/s vsini Rotational velocity
87- 89 F3.1 km/s e_vsini rms uncertainty on vsini
91- 93 A3 --- Run Run number(s)
94 A1 --- f_[IHA2007] [*] * indicates a non-member
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Note (2): From Irwin et al. (2007, Cat. J/MNRAS/377/741), but corrected
with ΔI=0.080-0.0076I and Δ(V-I)=0.300-0.153(V-I).
Note (3): K-band photometry comes from 2MASS, but is transformed to the
CIT system (KCIT=K2MASS+0.024)
Note (4): In original files, Kmag=0.020, transformed into "---" at CDS.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- --- [N2516-]
7- 14 A8 --- [IHA2007] Source name (N-N-NNNN) (G1)
17- 21 F5.2 [Lsun] logL Luminosity
23- 28 F6.3 d Per Period (G1)
30- 32 I3 d T/0 Turnover time
34- 38 F5.2 [-] logNR Rossby number
40- 43 F4.2 0.1nm W8488 CaT (8488Å) equivalent width
45- 48 F4.2 0.1nm e_W8488 rms uncertainty on W8488
50- 53 F4.2 0.1nm W8542 CaT (8542Å) equivalent width
55- 58 F4.2 0.1nm e_W8542 rms uncertainty on W8542
60- 64 F5.2 [-] logR'1 Chromospheric activity index of CaT (8488Å)
66- 68 F3.2 [-] e_logR'1 rms uncertainty on logR'1
70- 74 F5.2 [-] logR'2 Chromospheric activity index of CaT (8542Å)
76- 78 F3.2 [-] e_logR'2 rms uncertainty on logR'2
80- 82 A3 --- Run Run(s) number
83 A1 --- f_[IHA2007] [*] for stars falling outside our membership
criteria
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Global notes:
Note (G1): From Table 1 of Irwin et al. (2007, Cat. J/MNRAS/377/741)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Jan-2011