J/ApJ/822/47 K2 rotation periods for 65 Hyades members (Douglas+, 2016)
K2 rotation periods for low-mass Hyads and the implications for gyrochronology.
Douglas S.T., Agueros M.A., Covey K.R., Cargile P.A., Barclay T., Cody A.,
Howell S.B., Kopytova T.
<Astrophys. J., 822, 47-47 (2016)>
=2016ApJ...822...47D 2016ApJ...822...47D (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Stars, masses ; Clusters, open
Keywords: open clusters and associations: individual: Hyades;
stars: evolution; stars: late-type; stars: low-mass; stars: rotation
Abstract:
As the closest open cluster to the Sun, the Hyades is an important
benchmark for many stellar properties, but its members are also
scattered widely over the sky. Previous studies of stellar rotation in
the Hyades relied on targeted observations of single stars or data
from shallower all-sky variability surveys. The re-purposed Kepler
mission, K2, is the first opportunity to measure rotation periods
(Prot) for many Hyads simultaneously while also being sensitive to
fully convective M dwarf members. We analyze K2 data for 65 Hyads and
present Prot values for 48. Thirty-seven of these are new
measurements, including the first Prot measurements for fully
convective Hyads. For 9 of the 11 stars with Prot in the literature
and this work, the measurements are consistent; we attribute the two
discrepant cases to spot evolution. Nearly all stars with masses
≲0.3M☉ are rapidly rotating, indicating a change in rotation
properties at the boundary to full convection. When confirmed and
candidate binaries are removed from the mass-period plane, only three
rapid rotators with masses ≳0.3M☉ remain. This is in contrast
to previous results showing that the single-valued mass-period
sequence for ∼600Myr old stars ends at ∼0.65M☉ when binaries are
included. We also find that models of rotational evolution predict
faster rotation than is actually observed at ∼600Myr for stars
≲0.9M_☉. The dearth of single rapid rotators more massive than
∼0.3M☉ indicates that magnetic braking is more efficient than
previously thought, and that age-rotation studies must account for
multiplicity.
Description:
We analyze K2 Campaign 4 (2015 Feb 07-2015 Apr 23) light curves data
for 65 Hyades members with Kepler magnitudes Kp>9mag.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 123 75 Confirmed and candidate binary and planetary systems
among the K2 targets and Hyads with measured Prot
table4.dat 306 65 Rotation periods measured from K2 data
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See also:
B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/ApJS/224/2 : K2 EPIC stellar data for 138600 targets (Huber+, 2016)
J/ApJ/821/93 : mid M dwarfs rotation + Galactic kinematics (Newton+, 2016)
J/A+A/585/A7 : Hyades single stars fiducial photometry (Kopytova+, 2016)
J/A+A/559/A43 : Pan-STARRS1 (PS1) obs. of the Hyades (Goldman+, 2013)
J/MNRAS/432/1203 : Rotation periods of M-dwarf stars (McQuillan+, 2013)
J/AJ/144/93 : Close white dwarf+M dwarf binaries (WD+dM) (Morgan+, 2012)
J/ApJ/750/99 : The Pan-STARRS1 photometric system (Tonry+, 2012)
J/A+A/531/A92 : Deep all-sky census of the Hyades (Roeser+, 2011)
J/MNRAS/413/2218 : Stellar rotation in Hyades and Praesepe (Delorme+, 2011)
J/AJ/141/166 : HATNet variability survey of K & M dwarfs (Hartman+, 2011)
J/A+A/498/949 : F-K dwarfs velocities in open clusters (Mermilliod+, 2009)
J/MNRAS/384/1178 : 2MASS, SDSS & BVRI photometry for 825 stars (Bilir+, 2008)
J/AJ/130/873 : BQS objects data in the SDSS DR3 area (Jester+, 2005)
J/AJ/127/3579 : Radial velocities of Hyades stars (Paulson+, 2004)
J/A+A/386/492 : Cat. of High Angular Resolution data (Richichi, 2002)
J/A+A/354/881 : RVs of Praesepe + Hyades Am stars (Debernardi+ 2000)
J/A+A/331/81 : Hyades membership (Perryman+ 1998)
J/A+AS/124/75 : Multiple star catalogue (MSC) (Tokovinin 1997-1999)
J/A+A/310/879 : Hyades binaries (Barrado+, 1996)
J/ApJ/448/683 : Hyades RASS observations (Stern+ 1995)
J/MNRAS/257/257 : Proper motions in the Hyades (Reid 1992)
J/PASP/96/707 : Hyades lower main sequence (Duncan+, 1984)
http://keplerscience.arc.nasa.gov/ : Kepler & K2 science center home page
http://www.sdss3.org/ : SDSS-III home page
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- [RSP2011] ?=-9999 Roser et al. 2011, J/A+A/531/A92,
identifier (1)
7- 11 I5 --- HIP ?=-9999 Hipparcos identifier
13- 28 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
if any (or -9999)
30- 38 I9 --- EPIC ?=-9999 EPIC identifier
40 A1 --- Cand? [NY] Candidate binary?
42 A1 --- Conf? [NY] Confirmed binary?
44- 51 F8.2 d Per [1.8/7022]?=-9999 Orbital period
53-106 A54 --- Ref Reference code(s) (2)
108-123 A16 --- ID Identifier always filled (2MASS and then EPIC);
column added by CDS
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Note (1): The last two entries in the table are planet hosts, not
binary systems.
Note (2): Reference as follows:
barradoynavascues1996 = Barrado y Navascues et al. 1996, J/A+A/310/879
duchene2013 = Duchene et al. 2013A&A...555A.137D 2013A&A...555A.137D
griffin1982 = Griffin et al. 1982A&A...106..221G 1982A&A...106..221G
griffin2012 = Griffin, R. F. 2012JApA...33...29G 2012JApA...33...29G
guenther2005 = Guenther et al. 2005A&A...442.1031G 2005A&A...442.1031G
janson2014 = Janson et al. 2014ApJ...789..102J 2014ApJ...789..102J
kopytova2016 = Kopytova et al. 2016, J/A+A/585/A7
mann2015 = Mann et al. 2016ApJ...818...46M 2016ApJ...818...46M
mason2001 = Mason et al. 2001AJ....122.3466M 2001AJ....122.3466M
mermilliod2009 = Mermilliod et al. 2009, J/A+A/498/949
morzinski2011 = Morzinski, K. M. 2011PhDT.......180M 2011PhDT.......180M
nelson1970 = Nelson & Young 1970PASP...82..699N 1970PASP...82..699N
patience1998 = Patience et al. 1998AJ....115.1972P 1998AJ....115.1972P
paulson2004 = Paulson et al. 2004, J/AJ/127/3579
pourbaix2004 = Pourbaix et al. 2004, V/122; superseded by B/sb9
quinn2014 = Quinn et al. 2014ApJ...787...27Q 2014ApJ...787...27Q
reid1997 = Reid & Gizis 1997AJ....114.1992R 1997AJ....114.1992R
siegler2003 = Siegler et al. 2003ApJ...598.1265S 2003ApJ...598.1265S
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- [RSP2011] ?=-9999 Roser et al. 2011, J/A+A/531/A92,
identifier
7- 11 I5 --- HIP ?=- Hipparcos identifier
13- 14 I2 h RAh [3/4] Hour of Right Ascension (J2000)
16- 17 I2 min RAm Minute of Right Ascension (J2000)
19- 22 F4.1 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- [+] Sign of Declination (J2000)
25- 26 I2 deg DEd [12/26] Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of Declination (J2000)
36- 51 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
if any
53- 61 I9 --- EPIC EPIC identifier
63- 67 F5.2 mag Kpmag [8.7/16.7] Kepler apparent magnitude
69- 76 F8.2 Msun Mass [0.1/1.2]?=-9999 Mass
78 I1 --- Bin [0/2]? Binary status code (1)
80- 82 F3.1 pix Ap [2/6.5] Aperture radius (2)
84- 86 A3 --- lc Initial light curve for analysis (3)
88- 94 F7.4 d IPer [0.15/39.6] Initial orbital period
96-101 F6.4 --- IPw [0.05/0.96] Initial periodogram power
103-108 F6.4 --- I99.9 [0.008/0.03] Initial 99.9-percentile of
maximum peak
110-116 F7.4 d CPer [0.2/70] Corrected orbital period
118-123 F6.4 --- CPw [0.18/0.98] Corrected periodogram power
125-130 F6.4 --- C99.9 [0.008/0.05] Corrected 99.9-percentile of
maximum peak
132-138 F7.4 d SPer [0.1/70] Secondary orbital period
140-145 F6.4 --- SPw [0.01/0.91] Secondary periodogram power
147-152 F6.4 --- S99.9 [0.008/0.04] Secondary 99.9-percentile of
maximum peak
154 I1 --- Q [0/2] Quality flag (0=confident detection or
1=residual noise or confusion in the
periodogram)
156 A1 --- SpE [MNY] Visible spot evolution over several
cycles (M=Maybe, Y=Yes or N=No)
158 A1 --- mPer [MNY] Multiple periods in periodogram
160-163 A4 --- use Light curve selected for final analysis (4)
165-174 F10.4 d K2Per [0.2/49.4]?=-9999 K2 orbital period
176-185 F10.4 --- K2Pw [0.09/0.98]?=-9999 KS periodogram power
187-195 F9.7 --- Amp [0.001/0.4] Amplitude
197 A1 --- Ng [NY] Denotes presence of a visually-identified
neighbor somewhere on chip (5)
199 A1 --- Bl [MNY] A visually-identified neighbor is
blended with the target on the chip (5)
201-289 A89 --- Notes Other notes
291-306 A16 --- ID Identifier always filled (2MASS and
then EPIC); column added by CDS
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Note (1): Binary code as follows:
0 = a single star (to the best of our knowledge);
1 = a photometrically identified candidate binary;
2 = a confirmed binary from the literature.
See Section 2.4 and table 2.
Note (2): Used to extract the light curve. See Sections 4.1-4.2.
Note (3): Either raw (raw) or detrended (det). See Section 4.3.1.
Note (4): Either corrected (corr) or secondary (sec). See Section 4.3.6.
Note (5): See Section 4.2.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 01-Aug-2016