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 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:
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FileName Lrecl Records Explanations
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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)
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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
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Bytes Format Units Label Explanations
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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)
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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
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: tableb2.dat
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Bytes Format Units Label Explanations
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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
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Byte-by-byte Description of file: tableb.dat
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Bytes Format Units Label Explanations
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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
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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 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 2001MNRAS.321...57L, 2002MNRAS.329L..29L 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 1996ApJS..106..489P)
7 = B-V from Platais et al. (2007, Cat. J/A+A/461/509) and V-I from Sp.Type
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 28-Oct-2011