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J/ApJ/695/679            Stellar rotation in M35                 (Meibom+, 2009)

Stellar rotation in M35: mass-period relations, spin-down rates, and gyrochronology. Meibom S., Mathieu R.D., Stassun K.G. <Astrophys. J., 695, 679-694 (2009)> =2009ApJ...695..679M
ADC_Keywords: Stars, late-type ; Radial velocities ; Photometry, UBVRI ; Stars, variable ; Clusters, open Keywords: open clusters and associations: individual (M35) - stars: evolution - stars: late-type - stars: rotation Abstract: We present the results of a five month photometric time-series survey for stellar rotation over a 40'x40' field centered on the 150Myr open cluster M35 (=NGC 2168). We report rotation periods for 441 stars within this field and determine their cluster membership and binarity based on a decade-long radial velocity survey, proper-motion measurements, and multiband photometric observations. We find that 310 of the stars with measured rotation periods are late-type members of M35. The distribution of rotation periods for cluster members span more than 2 orders of magnitude from ∼0.1 to 15 days, not constrained by the sampling frequency and the timespan of the survey. With an age between the zero-age main sequence and the Hyades, and with ∼6 times more rotation periods than measured in the Pleiades, M35 permit detailed studies of early rotational evolution of late-type stars. Nearly 80% of the 310 rotators lie on two distinct sequences in the color-period plane, and define clear relations between stellar rotation period and color (mass). The M35 color-period diagram enables us to determine timescales for the transition between the two rotational states, of ∼60Myr and ∼140Myr for G and K dwarfs, respectively. Description: We photometrically surveyed stars in a region approximately 40'x40' centered on the open cluster M35 over a timespan of 143 days. The photometric data were obtained in the Johnson V band with the WIYN5 0.9m telescope on Kitt Peak equipped with a 2kx2k CCD camera. The complete data set presented is composed of images from high-frequency (approximately once per hour for 5-6 hours per night) time-series photometric observations over 16 full nights during 2002 December 2-17, complemented with a queue-scheduled observing program over 143 nights from 2002 October 22 to 2003 March 11, obtaining one image per night interrupted only by bad weather and scheduled instrument changes. All spectroscopic data were obtained using the WIYN 3.5m telescope equipped with a multiobject fiber optic positioner (Hydra) feeding a bench mounted spectrograph. Observations were done at central wavelengths of 5130Å or 6385Å with a wavelength range of ∼200Å providing many narrow absorption lines. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 86 441 Data for the 441 stars with measured rotation periods in the field of M35
See also: III/244 : Catalog of Stellar Rotational Velocities (Glebocki+ 2005) J/ApJ/546/1006 : VRI photometry of M35 (Barrado y Navascues+, 2001) J/MNRAS/306/361 : UBVI CCD photometry of M35 (NGC 2168) (Sung+ 1999) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Running identification number (1) 5 I1 h RAh Hour of Right Ascension (J2000) 7- 8 I2 min RAm Minute of Right Ascension (J2000) 10- 15 F6.3 s RAs Second of Right Ascension (J2000) 17- 18 I2 deg DEd Degree of Declination (J2000) 20- 21 I2 arcmin DEm Arcminute of Declination (J2000) 23- 28 F6.3 arcsec DEs Arcsecond of Declination (J2000) 30- 35 F6.3 d Prot Rotation period 37- 41 F5.2 mag V0mag Intrinsic apparent V band magnitude 43- 47 F5.2 mag (B-V)0 ? Intrinsic (B-V) color index 49- 52 F4.2 mag (V-I)0 Intrinsic (V-I) color index 54- 55 I2 --- o_RV ? Number of measurements in RV 57- 61 F5.1 km/s RV ? Average Radial Velocity 63- 67 F5.1 km/s e_RV ? The 1σ error in RV 69- 70 I2 % Mrv ? Membership probability from RV measurement 72- 73 I2 % Mpm Membership probability from proper motion 75- 79 A5 --- Mmb Cluster membership status (2) 81- 84 F4.2 --- W Weight when fitting the rotational isochrones 86 A1 --- State [icg-] Rotational state (3)
Note (1): Assigned to 310 rotators after sorting by rotation period. <Cl* NGC 2168 MMS NNN> in Simbad. Note (2): Membership code as follows: PM = Photometric Member (described in Section 2.5); PNM = Photometric Non-Member; PSM = Photometric and Spectroscopic Member; PPM = Photometric and Proper-motion Member; PMSNM = Photometric Member but Spectroscopic Non-Member. Note (3): State in evolution as defined in Barnes (2003ApJ...586..464B): i = I (radiative/convective interface) sequence; c = C (fully convective) sequence; g = gap; - = location in the color-period diagram does not correspond to either of the sequences or the gap.
History: From electronic version of the journal References: von Hippel et al., Pap I 1998AJ....116.1789V Sarajedini, et al., Pap II 1999AJ....118.2894S Sarajedini, Pap III 1999AJ....118.2321S Sarajedini et al., Pap IV 1999AJ....118.2894S Barrado et al., Pap V 2001ApJ...549..452B Sills & Deliyannis, Pap VI 2000ApJ...544..944S Platais et al., Pap VII 2001AJ....122.1486P, Cat. J/AJ/122/1486 Platais et al., Pap VIII 2002AJ....124..601P, Cat. J/AJ/124/601 Stassun et al., Pap IX 2002A&A...382..899S, Cat. J/A+A/382/899 Grocholski & Sarajedini, Pap X 2002AJ....123.1603G von Hippel et al., Pap XI 2002AJ....124.1555V Deliyannis et al., Pap XII 2002ApJ...577L..39D Barnes Pap XIII 2003ApJ...586..464B Barnes Pap XIV 2003ApJ...586L.145B Kafka & Honeycutt, Pap XV 2003AJ....126..276K Grocholski & Sarajedini, Pap XVI 2003MNRAS.345.1015G Platais et al., Pap XVII 2003AJ....126.2922P, Cat. J/AJ/126/2922 Mathieu et al., Pap XVIII 2004ApJ...602L.121M Sarajedini, et al., Pap XIX 2004AJ....127..991S Kafka et al., Pap XX 2004AJ....127.1622K Steinhauer & Deliyannis, Pap XXI 2004ApJ...614L..65S Meibom & Mathieu, Pap XXII 2005ApJ...620..970M von Hippel et al., Pap XXIII 2006ApJ...645.1436V Hole et al. Pap XXIV 2009AJ....138..159H, Cat. J/AJ/138/159 James et al., Pap XXV Platais et al., Pap XXVI 2007A&A...461..509P, Cat. J/A+A/461/509 Kafka et al., Pap XXVII Giampapa et al., Pap XXVIII 2006ApJ...651..444G Meibom et al., Pap XXIX 2006ApJ...653..621M Jeffery et al., Pap XXX 2007ApJ...658..391J Meibom et al., Pap XXXI 2007ApJ...665L.155M Geller et al., Pap XXXII 2008AJ....135.2264G, Cat. J/AJ/135/2264 Yadav et al., Pap XXXIII 2008A&A...484..609Y, Cat. J/A+A/484/609 Platais et al., Pap XXXV 2008MNRAS.391.1482P, Cat. J/MNRAS/391/1482 Geller et al., Pap XXXVI 2009AJ....137.3743G, Cat. J/AJ/137/3743 Meibom et al., Pap XXXVII 2009AJ....137.5086M, Cat. J/AJ/137/5086 Geller et al., Pap XXXVIII 2010AJ....139.1383G, Cat. J/AJ/139/1383 Anthony-Twarog et al., Pap XXXIX 2010AJ....139.2034A, Cat. J/AJ/139/2034 Sarajedini et al., Pap XL 2009ApJ...698.1872S Chumak et al., Pap XLI 2010MNRAS.402.1841C Casetti-Dinescu et al., Pap XLII 2010AJ....139.1889C James et al., Pap XLIII 2010A&A...515A.100J, Cat. J/A+A/515/A100 Platais et al., Pap XLIV 2011MNRAS.413.1024P, Cat. J/MNRAS/413/1024 Meibom et al., Pap XLV 2011ApJ...733..115M, Cat. J/ApJ/733/115 Platais et al., Pap XLVI 2011ApJ...733L...1P Gosnell et al., Pap XLVII 2012ApJ...745...57G Geller & Mathieu , Pap XLVIII 2012AJ....144...54G Platais et al., Pap XLIX 2012ApJ...751L...8P Cummings et al., Pap L 2012AJ....144..137C Geller et al., Pap LI 2013AJ....145....8G Yang et al., Pap LII 2013ApJ...762....3Y Sandquist et al., Pap LIII 2013ApJ...762...58S Anthony-Twarog, Pap LIV 2013ApJ...767L..19A Platais et al., Pap LV 2013AJ....146...43P, Cat. J/AJ/146/43 Pap LVI Maderak et al., Pap LVII 2013AJ....146..143M Pap LVIII Tofflemire et al., Pap LIX 2014AJ....148...61T, Cat. J/AJ/148/61 Milliman et al., Pap LX 2014AJ....148...38M, Cat. J/AJ/148/38 Anthony-Twarog et al., Pap LXI 2014AJ....148...51A, Cat. J/AJ/148/51 Thompson et al., Pap LXII 2014AJ....148...85T, Cat. J/AJ/148/85 Maderak et al., Pap LXIII 2015AJ....149..141M Pap LXIV Lee-Brown et al., Pap LXV 2015AJ....149..121L, Cat. J/AJ/149/121
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 29-Apr-2011
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