J/MNRAS/430/1433 NGC 2264 members periods with CoRoT (Affer+, 2013)
Rotation in NGC 2264: a study based on CoRoT photometric observations.
Affer L., Micela G., Favata F., Flaccomio E., Bouvier J.
<Mon. Not. R. Astron. Soc., 430, 1433-1446 (2013)>
=2013MNRAS.430.1433A 2013MNRAS.430.1433A
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Stars, variable ;
Photometry
Keywords: stars: pre-main-sequence - stars: rotation
Abstract:
Rotation is one of the key stellar parameters which undergo
substantial evolution during the stellar lifetime, in particular
during the early stages. Stellar rotational periods can be determined
on the basis of the periodic modulation of starlight produced by
non-uniformities on the surface of the stars, due to manifestation of
stellar activity. We present the results of an extensive search for
rotational periods among NGC 2264 cluster members, based on
photometric monitoring using the COnvection ROtation and planetary
Transits (CoRoT) satellite, with particular attention to the
distribution of classical and weak-line T-Tauri stars. NGC 2264 is one
of the nearest and best studied star forming region in the solar
neighbourhood, with an estimated age of 3Myr, and is the object of a
recent simultaneous multiband campaign including a new CoRoT
observation with the aim to assess the physical origin of the observed
variability. We find that the rotational distributions of classical
and weak-line T-Tauri stars are different, suggesting a difference in
the rotational properties of accreting and non-accreting stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 80 304 Catalogue of periods for NGC 2264 members
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See also:
b/corot : CoRoT observation log Release 13 (CoRoT, 2009-2014)
J/AJ/114/2644 : UBVRIHa photometry of NGC2264 (Sung+, 1997)
J/A+A/345/521 : BVRI photometry of NGC 2264 (Flaccomio+, 1999)
J/A+A/355/651 : HRI observations of PMS stars in NGC 2264 (Flaccomio+, 2000)
J/AJ/123/1528 : UBV(RI)C and JHK photometry in NGC 2264 (Rebull+, 2002)
J/AJ/127/1117 : Halpha emission-line stars in NGC2264 (Reipurth+, 2004)
J/AJ/127/2659 : CHANDRA observations of NGC 2264 (Ramirez+, 2004)
J/AJ/128/1684 : NGC 2264: VRIHα photometry (Sung+, 2004)
J/AJ/129/829 : Hα emission stars in NGC 2264 (Dahm+, 2005)
J/A+A/417/557 : Rotation + variability of PMS Stars in NGC 2264 (Lamm, 2004)
J/A+A/430/1005 : VRIHα photometry of NGC 2264 variables (Lamm+, 2005)
J/A+A/455/903 : ACIS-I observations of NGC 2264 (Flaccomio+, 2006)
J/ApJ/648/1090 : Radial velocities of NGC 2264 stars (Furesz+, 2006)
J/AJ/134/999 : X-ray observations of NGC 2264 (Dahm+, 2007)
J/ApJ/671/605 : NGC 2264 and ONC PMS stars in the infrared (Cieza+, 2007)
J/AJ/135/441 : VRIHα photometry in NGC 2264 (Sung+, 2008)
J/AJ/138/963 : Rotation of NGC 2264 members (Baxter+, 2009)
J/AJ/138/1116 : A Spitzer view of NGC 2264 (Sung+, 2009)
J/ApJ/741/35 : NIR photometry and polarization in NGC 2264 (Kwon+, 2011)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [0]
2- 10 I9 --- CoRoT CoRoT number (Cat. B/corot)
11 A1 --- n_CoRoT [I] I indicates irregular variables
13- 18 F6.3 d Per ?=- Period
19- 20 A2 --- n_Per [A ] AA indicates AA-Tau behaviour (3)
22- 27 F6.2 % Amp Short term variability amplitude of the light
curve
29- 34 F6.3 mag Rmag R magnitude
36- 41 F6.3 mag B-V B-V colour index
43- 51 F9.5 deg RAdeg Right ascension (J2000)
53- 60 F8.5 deg DEdeg Declination (J2000)
62- 64 A3 --- Cl [I ] Membership-IR classification (1)
68- 72 F5.1 0.1nm EWHa ? Hα equivalent width from Lamm et al.
(2004, Cat. J/A+A/417/557)
73- 74 A2 --- --- [0 ]
77- 79 F3.1 Msun Mass ? Mass (2)
80 A1 --- --- [0]
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Note (1): (Class II and Class III) of Sung et al. (2009, Cat. J/AJ/138/1116),
considering also other membership criteria listed in Sung et al.
(2008, Cat. J/AJ/135/441).
Note (2): Masses are from the Siess et al. (2000A&A...358..593S 2000A&A...358..593S) tracks.
Stars were placed in the Teff, Lbol diagram converting spectral types to
Teff and I band and (in absence of the I magnitude) V-band bolometric
corrections, using Kenyon & Hartmann (1995, Cat. J/ApJS/101/117).
Note (3): the photometric bahevious or AA Tau consists in a flat maximum
in the light curve interrupted by deep quasi-periodical minima due to
obscuring material with a variable structure located in the inner disk
region, near the corotation radius (Alencar et al. 2010A&A...519A..88A 2010A&A...519A..88A)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Apr-2014