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J/A+A/532/A10       RACE-OC project. II.                     (Messina+, 2011)

RACE-OC project: rotation and variability in the ε Chamaeleontis, Octans, and Argus stellar associations. Messina S., Desidera S., Lanzafame A.C., Turatto M., Guinan E.F. <Astron. Astrophys., 532, A10-10 (2011)> =2011A&A...532A..10M
ADC_Keywords: Clusters, open ; Stars, late-type ; Stars, variable ; Rotational velocities Keywords: stars: activity - stars: late-type - stars: rotation - starspots - stars: pre-main sequence Abstract: Rotational properties of late-type low-mass members of associations of known age provide a fundamental source of information on stellar internal structure and its evolution. We aim at determining the rotational and magnetic-related activity properties of stars at different stages of evolution. We focus our attention primarily on members of young stellar associations of known ages. Specifically, we extend our previous analysis in Paper I (Messina et al., 2010, Cat. J/A+A/520/A15) to 3 additional young stellar associations beyond 100pc and with ages in the range 6-40Myr: ε Chamaeleontis (∼6Myr), Octans (∼20Myr), and Argus (∼40Myr). Additional rotational data of η Chamaeleontis and IC 2391 clusters are also considered. Rotational periods were determined by applying the Lomb-Scargle periodogram technique to photometric time-series data obtained by the All Sky Automated Survey (ASAS) and the Wide Angle Search for Planets (SuperWASP) archives. The magnetic activity level was derived from the amplitude of the V light curves. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tables.dat 139 99 Summary of period searches (tables 2-4 of the paper) tableb1.dat 114 78 Summary of period search of 71 targets in Paper I and of seven recently added members with photometry timeseries in the SuperWASP archive tableb2.dat 98 486 Summary of period search based on ASAS/superWASP (SW) photometry tableb.dat 116 99 Summary data from the literature and mass and radius derived from evolutionary tracks (tables B3-B5 of the paper)
See also: II/264 : ASAS Variable Stars in Southern hemisphere (Pojmanski+, 2002-2005) J/A+A/520/A15 : RACE-OC project: YSOs within 100pc (Messina+, 2010) Byte-by-byte Description of file: tables.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Assoc Association name 9- 23 A15 --- Target Target name 25- 37 A13 --- ASAS ASAS name (HHMMSS.ss+DDMM.m, J2000) 39- 44 F6.3 d Per ? Period 45 A1 --- n_Per [bc] Undetected or inconsistent period (1) 47- 51 F5.3 d e_Per ?=- rms uncertainty on Per 53- 61 A9 --- TS ?=- Timeseries sections 63 A1 --- Qual [CLU] Quality for Confirmed, Likely, Undertain 65- 68 F4.2 mag Vamp ?=- V-band maximum peak-to-peak light curve amplitude 70- 73 F4.2 mag Vsig ?=- Photometric precision 75- 79 F5.2 mag Vmin Minimum V-band magnitude 81- 84 F4.2 mag B-V ?=- B-V colour index 85- 86 A2 --- n_B-V [ad Av] Note on B-V (2) 88- 93 A6 --- SpType MK spectral type 96-105 A10 --- Note Note about binarity or period origin (3) 107-115 A9 --- VName Variable name 117-139 A23 --- OName Other name (IC 2391 cluster only)
Note (1): Notes on Period as follows: b = period undetected in the periodogram of the complete time series c = vsini inconsistent with veq=2πR/P Note (2): Notes on B-V as follows: a = ASAS very sparse observations d = from spectral type Av = Vmag and B-V corrected for reddening. Note (3): Notes use the abbreviations: V = visual companion B = binary system Plit = period as given in the literature PACVS = period in ACVS (ASAS Catalog of Variable Stars (see Cat. II/264) SB = binary system
Byte-by-byte Description of file: tableb1.dat
Bytes Format Units Label Explanations
1- 18 A18 --- Assoc Association name 20- 37 A18 --- Target Target name 39- 65 A27 --- OName SuperWASP/ASAS name 66- 72 F7.4 d Per ?=- Period 75- 80 F6.4 d e_Per ?=- rms uncertainty on Per 82- 86 A5 --- Seg Timeserie segment 91-114 A24 --- Note Note on period
Byte-by-byte Description of file: tableb2.dat
Bytes Format Units Label Explanations
1- 18 A18 --- Assoc Association name 21- 35 A15 --- Target Target name 39- 47 F9.4 d JDi Initial Julian date (JD-2450000) 49- 57 F9.4 d JDf Final Julian date (JD-2450000) 59- 65 F7.4 d Per ?=- Period 67- 72 F6.4 d e_Per ?=- rms uncertainty on Per 74- 79 F6.2 --- Npow Normalised power 82- 86 F5.2 --- P99 Power at 99% confidence level 88- 98 A11 --- Note Note
Byte-by-byte Description of file: tableb.dat
Bytes Format Units Label Explanations
1- 7 A7 --- Assoc Association name 9- 23 A15 --- Target Target name 25- 26 I2 h RAh Right ascension (J2000) 28- 29 I2 min RAm Right ascension (J2000) 31- 35 F5.2 s RAs Right ascension (J2000) 37 A1 --- DE- Declination sign (J2000) 38- 39 I2 deg DEd Declination (J2000) 41- 42 I2 arcmin DEm Declination (J2000) 44- 48 F5.2 arcsec DEs Declination (J2000) 50- 54 F5.2 mag Vmag V magnitude 56- 59 F4.2 mag (B-V) ?=- B-V colour index (from literature) 61- 64 F4.2 mag (V-I) ?=- V-I colour index (from literature) 66- 70 F5.2 mag VMAG Absolute V magnitude 72- 76 F5.1 pc Dist Distance 78 A1 --- l_vsini Limit flag on vsini 79- 84 F6.2 km/s vsini ?=- Rotational velocity 86- 88 F3.1 Msun Mass ?=- Mass 90- 93 F4.2 Rsun Rad ?=- Radius 95-101 A7 --- SpT.l MK spectral type from literature 103-109 A7 --- MGR Membership to association (1) 111 A1 --- r_Vmag [ATLP] Reference for Vmag (2) 112 A1 --- --- [/] 113 I1 --- r_(V-I) [0/7] Reference for V-I and B-V (3) 115-116 A2 --- n_Vmag [Av] Av when corrected for extinction
Note (1): The association names are: Arg = Argus (table B5) Oct = Octans (table B4) eps Cha = ε Cha (table B3) eta Cha = η Cha (table B3) Note (2): Reference for Vmag as follows: A = ASAS (Cat. II/264) T = Torres et al. (2006, Cat. J/A+A/460/695) L = Lawson et al. (2002MNRAS.329L..29L) P = Platais et al. (2007, Cat. J/A+A/461/509) Note (3): References for V-I as follows: 0 = V-I form Torres et al. (2006, Cat. J/A+A/460/695) 1 = V-I form Alcala et al. (1995, Cat. J/A+AS/114/109) 2 = V-I form from Sp.Type 3 = V-I form from Lawson et al. (2001MNRAS.321...57L, 2002MNRAS.329L..29L) 4 = B-V and V-I from Torres et al. (2006, Cat. J/A+A/460/695) 5 = B-V from Torres et al. (2006, Cat. J/A+A/460/695) and V-I from Sp.Type 6 = B-V and V-I from Patten & Simon (1996ApJS..106..489P) 7 = B-V from Platais et al. (2007, Cat. J/A+A/461/509) and V-I from Sp.Type
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Oct-2011
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