J/A+A/560/A13 Stellar rotation in h Per (Moraux+, 2013)
The Monitor Project: stellar rotation at 13 Myr.
I. A photometric monitoring survey of the young open cluster h Per.
Moraux E., Artemenko S., Bouvier J., Irwin J., Ibrahimov M., Magakian T.,
Grankin K., Nikogossian E., Cardoso C., Hodgkin S., Aigrain S.,
Movsessian T.A.
<Astron. Astrophys. 560, A13 (2013)>
=2013A&A...560A..13M 2013A&A...560A..13M
ADC_Keywords: Clusters, open ; Photometry
Keywords: stars: rotation - stars: low-mass -
open clusters and associations: individual: h Per
Abstract:
We aim at constraining the angular momentum evolution of low mass
stars by measuring their rotation rates when they begin to evolve
freely towards the ZAMS, i.e. after the disk accretion phase has
stopped. We conducted a multi-site photometric monitoring of the young
open cluster h Persei that has an age of ∼13Myr. The observations
were done in the I-band using 4 different telescopes and the
variability study is sensitive to periods from less than 0.2 day to
20-days. Rotation periods are derived for 586 candidate cluster
members over the mass range 0.4≤M/M☉≤1.4. The rotation period
distribution indicates a slightly higher fraction of fast rotators
for the lower mass objects, although the lower and upper envelopes of
the rotation period distribution, located respectively at ∼0.2-0.3d
and ∼10d, are remarkably flat over the whole mass range. We combine
this period distribution with previous results obtained in younger and
older clusters to model the angular momentum evolution of low mass
stars during the PMS. The h Per cluster provides the first
statistically robust estimate of the rotational period distribution of
solar-type and lower mass stars at the end of the PMS accretion phase
(≥10Myr). The results are consistent with models that assume
significant core-envelope decoupling during the angular momentum
evolution to the ZAMS.
Description:
List of periodic objects ordered by periodogram peak power. The binary
flag is set to 2 if the object has been identified as a binary in the
i'CFHT, i'CFHT-K CMD and to 1 otherwise. The V and IC magnitudes
as well as the membership flag (column before last) are from Currie et
al. (2010, Cat. J/ApJS/186/191). The near infrared photometry has been
obtained with WIRCam at CFHT and is from Cardoso et al. (in prep.).
The last column indicates whether the object has been detected in
Hα (Currie et al., 2007, Cat. J/ApJ/659/599) and/or in X-rays
(Currie et al., 2009, Cat. J/AJ/137/3210; C. Argiroffi, priv. com).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 105 586 Period and photometric parameter for the 586
periodic objects in h Per
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See also:
J/ApJ/659/599 : IRAC and JHKs photometry of h and chi Persei (Currie+, 2007)
J/AJ/137/3210 : Chandra observations of h Persei (Currie+, 2009)
J/ApJS/186/191 : VI photometry and spectroscopy in h+χ Per (Currie+, 2010)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Seq [1/586] hPer sequential number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 33 F5.2 mag i'mag [15.6/20.7] CFHT/Megacam i'magnitude
35- 41 F7.4 d Per Period observed
43- 47 F5.1 -- Power Periodogram peak power
49 A1 --- l_FAP Limit flag on FAP
50- 54 F5.3 --- FAP [0/0.05] False alarm probability
56- 61 F6.4 mag Amp Amplitude
63- 66 F4.2 Msun Mass Estimated mass
68 I1 -- bin [1/2] Binary flag (1)
70- 74 F5.2 mag Vmag ?=- V magnitude
76- 80 F5.2 mag Icmag ?=- Ic magnitude
82- 86 F5.2 mag Jmag CFHT/WIRCAM J magnitude
88- 92 F5.2 mag Hmag CFHT/WIRCAM H magnitude
94- 98 F5.2 mag Kmag CFHT/WIRCAM K magnitude
100 I1 -- Mmb [0/3]?=- Membership flag, 0=non-member (2)
102-105 A4 -- XH [X Ha] Detected in X-rays (X)
and/or Hα (Ha)
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Note (1): Binary flag as follows:
1 = located on the single sequence in the (i'_CFHT, i'_CFHT-K) CMD
2 = located on the binary sequence in the (i'_CFHT, i'_CFHT-K) CMD
Note (2): Membership flag from Currie et al. (2010, Cat. J/ApJS/186/191):
1 = spectroscopic members
2 = photometric members
3 = spectroscopic and photometric member
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Acknowledgements:
Estelle Moraux, estelle.moraux(at)obs.ujf-grenoble.fr
(End) Estelle Moraux [IPAG, France], Patricia Vannier [CDS] 09-Oct-2013