J/AJ/154/124 M dwarfs-long-term photometric variability (Clements+, 2017)
The solar neighborhood.
XLI. A study of the wide main sequence for M dwarfs-long-term photometric
variability.
Clements T.D., Henry T.J., Hosey A.D., Jao W.-C., Silverstein M.L.,
Winters J.G., Dieterich S.B., Riedel A.R.
<Astron. J., 154, 124-124 (2017)>
=2017AJ....154..124C 2017AJ....154..124C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, dwarfs ; Stars, M-type ; Photometry, VRI ;
Photometry, infrared ; Stars, distances
Keywords: stars: activity - stars: low-mass
Abstract:
We report findings from a long-term photometric variability study of
M dwarfs carried out at the SMARTS 0.9 m telescope at the Cerro Tololo
Inter-American Observatory. As part of a multi-faceted effort to
investigate the range of luminosities of M dwarfs of a given color on
the Hertzsprung-Russell Diagram, 76 M dwarfs have been observed for
3-17 years in the Johnson-Kron-Cousins V band. We find that stars elevated
above the center of the main sequence distribution tend to have higher
levels of variability, likely caused by magnetic activity, than their
fainter counterparts below the center. This study provides insight
into how the long-term magnetic activity of these stars may be affecting
their sizes, luminosities, and thus positions on the H-R Diagram.
Description:
Long-term photometric variability is the focus of this paper. Here we
use data sets on 76 M dwarfs spanning up to 17 years that have been
acquired at the CTIO/SMARTS 0.9 m telescope as part of the RECONS
astrometry/photometry program.
The V magnitudes were obtained from our own work and various carefully
vetted sources, primarily from Bessel (1990A&AS...83..357B 1990A&AS...83..357B), Weis
(1994AJ....107.1135W 1994AJ....107.1135W, 1996AJ....112.2300W 1996AJ....112.2300W), and Koen et al. (2010,
J/MNRAS/403/1949). The K magnitudes are Ks (hereafter, simply K) from
2MASS (Skrutskie et al. 2006, Cat. VII/233). Distances are calculated
using the weighted mean trigonometric parallaxes from the CTIOPI
(Cerro Tololo Inter-American Observatory Parallax Investigation)
project and additional references listed in Table 1.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 116 76 Properties of the Target Stars
--------------------------------------------------------------------------------
See also:
I/174 : Yale Trigonometric Parallaxes Preliminary (van Altena+ 1991)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
J/AJ/129/413 : New high proper motion stars (-90<DE< -47) (Subasavage+, 2005)
J/AJ/130/1658 : New high proper motion stars (-47<δ<00)
(Subasavage+, 2005)
J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/AJ/133/2898 : New proper-motion stars (-90<DE< -47) (Finch+, 2007)
J/AJ/134/252 : New nearby white dwarf systems (Subasavage+, 2007)
J/AJ/136/452 : Astrometric studies of GAT stars (Gatewood, 2008)
J/AJ/141/21 : CCD distance estimates of SCR targets (Winters+, 2011)
J/AJ/142/10 : New proper motion stars 0.40"/yr>pm≥0.18"/yr (Boyd+, 2011)
J/AJ/142/92 : New proper motion stars with pm≥0.18"/yr (Boyd+, 2011)
J/AJ/144/64 : Solar neighborhood. XXVIII. Substellar companions
(Dieterich+, 2012)
J/ApJ/748/93 : K-band spectra for 133 nearby M dwarfs (Rojas-Ayala+, 2012)
J/ApJ/758/56 : Young M dwarfs within 25pc. II. Kinematics (Shkolnik+, 2012)
J/AJ/147/85 : Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)
J/AJ/147/94 : Solar neighborhood. XXXII. L and M dwarfs (Dieterich+, 2014)
J/AJ/149/5 : Solar neighborhood. XXXV. Distances to M dwarfs
(Winters+, 2015)
J/AJ/150/6 : Solar neighborhood. XXXVI. VRI variability of M dwarfs
(Hosey+, 2015)
J/AJ/152/141 : Solar neighborhood. XXXVII. RVs for M dwarfs (Benedict+, 2016)
J/AJ/153/14 : Solar neighborhood XXXVIII. Nearby M dwarf systems
(Winters+, 2017)
J/AJ/154/32 : Solar neighborhood. XXXIX. Nearby white dwarfs
(Subasavage+, 2017)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 A13 --- Name Target star name
15- 16 I2 h RAh Hour of Right Ascension (J2000)
18- 19 I2 min RAm Minute of Right Ascension (J2000)
21- 22 I2 s RAs Second of Right Ascension (J2000)
24 A1 --- DE- Sign of the Declination (J2000)
25- 26 I2 deg DEd Degree of Declination (J2000)
28- 29 I2 arcmin DEm Arcminute of Declination (J2000)
31- 32 I2 arcsec DEs Arcsecond of Declination (J2000)
34- 38 F5.2 mag Vmag [9.85/15.22] Johnson V band magnitude
40- 44 F5.2 mag Imag [7.17/11.76]? Cousins I band magnitude
46- 49 F4.2 mag V-Ks [3.92/6.23] V-Ks color index
51- 54 F4.1 pc Dist [3/47.1] Distance
56- 60 A5 --- r_Dist Reference for Dist (1)
62- 66 F5.2 mag VMag [8.87/14.73] Absolute V band magnitude
68- 72 F5.2 mag e_VMag [-2.94/2.22] Uncertainty in VMag
74- 84 A11 "date" Date1 First date of observation
86- 96 A11 "date" Date2 Last date of observation
98-102 F5.2 yr Dur [2.26/17] Duration of observation
104-106 I3 --- Nfr [33/406] Number of frames
108-112 F5.1 mmag Var [6.3/124.1] Magnitude of the variability (2)
114-116 A3 --- n_Name Note on Name (3)
--------------------------------------------------------------------------------
Note (1): Reference as follows:
Cos05 = Costa et al. (2005AJ....130..337C 2005AJ....130..337C);
Cos06 = Costa et al. (2006AJ....132.1234C 2006AJ....132.1234C);
Dav15 = Davison et al. (2015AJ....149..106D 2015AJ....149..106D);
Gat08 = Gatewood (2008, J/AJ/136/452);
Hen06 = Henry et al. (2006AJ....132.2360H 2006AJ....132.2360H);
Jao05 = Jao et al. (2005AJ....129.1954J 2005AJ....129.1954J);
Jao11 = Jao et al. (2011AJ....141..117J 2011AJ....141..117J);
Lur14 = Lurie et al. (2014AJ....148...91L 2014AJ....148...91L);
Rie10 = Riedel et al. (2010AJ....140..897R 2010AJ....140..897R);
Rie11 = Riedel et al. (2011AJ....142..104R 2011AJ....142..104R);
Rie14 = Riedel et al. (2014, J/AJ/147/85);
Shk12 = Shkolnik et al. (2012, J/ApJ/758/56);
vLe07 = van Leeuwen (2007, Cat. I/311);
YPC95 = van Altena et al. (1995, Cat. I/174).
Note (2): For this study we define photometric variability as the standard
deviation in the flux of a target star, in milli-magnitudes (mmag),
when compared to a set of reference stars in the same field.
Note (3): Note as follows:
Y = Known young star;
S = Known subdwarf star;
(S) = Suspected, but unconfirmed subdwarf star.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Henry et al., Paper I 1994AJ....108.1437H 1994AJ....108.1437H
Kirkpatrick et al., Paper II 1995AJ....109..797K 1995AJ....109..797K
Simons et al., Paper III 1996AJ....112.2238S 1996AJ....112.2238S
Henry et al., Paper IV 1997AJ....114..388H 1997AJ....114..388H
Patterson et al., Paper V 1998AJ....115.1648P 1998AJ....115.1648P
Henry et al., Paper VI 2002AJ....123.2002H 2002AJ....123.2002H
Jao et al., Paper VII 2003AJ....125..332J 2003AJ....125..332J
Hambly et al., Paper VIII 2004AJ....128..437H 2004AJ....128..437H
Golimowski et al., Paper IX 2004AJ....128.1733G 2004AJ....128.1733G
Henry et al., Paper X 2004AJ....128.2460H 2004AJ....128.2460H
Deacon et al., Paper XI 2005AJ....129..409D 2005AJ....129..409D
Subasavage et al., Paper XII 2005AJ....129..413S 2005AJ....129..413S, Cat. J/AJ/129/413
Jao et al., Paper XIII 2005AJ....129.1954J 2005AJ....129.1954J
Costa et al., Paper XIV 2005AJ....130..337C 2005AJ....130..337C
Subasavage et al., Paper XV 2005AJ....130.1658S 2005AJ....130.1658S, Cat. J/AJ/130/1658
Costa et al., Paper XVI 2006AJ....132.1234C 2006AJ....132.1234C
Henry et al., Paper XVII 2006AJ....132.2360H 2006AJ....132.2360H
Finch et al., Paper XVIII 2007AJ....133.2898F 2007AJ....133.2898F, Cat. J/AJ/133/2898
Subasavage et al., Paper XIX 2007AJ....134..252S 2007AJ....134..252S, Cat. J/AJ/134/252
Subasavage et al., Paper XX 2008AJ....136..899S 2008AJ....136..899S
Subasavage et al., Paper XXI 2009AJ....137.4547S 2009AJ....137.4547S
Riedel et al., Paper XXII 2010AJ....140..897R 2010AJ....140..897R
Winters et al., Paper XXIII 2011AJ....141...21W 2011AJ....141...21W, Cat. J/AJ/141/21
Jao et al., Paper XXIV 2011AJ....141..117J 2011AJ....141..117J
Boyd et al., Paper XXV 2011AJ....142...10B 2011AJ....142...10B, Cat. J/AJ/142/10
Riedel et al., Paper XXVI 2011AJ....142..104R 2011AJ....142..104R
Boyd et al., Paper XXVII 2011AJ....142...92B 2011AJ....142...92B, Cat. J/AJ/142/92
Dieterich et al., Paper XXVIII 2012AJ....144...64D 2012AJ....144...64D, Cat. J/AJ/144/64
Cantrell et al., Paper XXIX 2013AJ....146...99C 2013AJ....146...99C
Mamajek et al., Paper XXX 2013AJ....146..154M 2013AJ....146..154M
Jao et al., Paper XXXI 2014AJ....147...21J 2014AJ....147...21J
Dieterich et al., Paper XXXII 2014AJ....147...94D 2014AJ....147...94D, Cat. J/AJ/147/94
Riedel et al., Paper XXXIII 2014AJ....147...85R 2014AJ....147...85R, Cat. J/AJ/147/85
Lurie et al., Paper XXXIV 2014AJ....148...91L 2014AJ....148...91L
Winters et al., Paper XXXV 2015AJ....149....5W 2015AJ....149....5W, Cat. J/AJ/149/5
Hosey et al., Paper XXXVI 2015AJ....150....6H 2015AJ....150....6H, Cat. J/AJ/150/6
Benedict et al., Paper XXXVII 2016AJ....152..141B 2016AJ....152..141B, Cat. J/AJ/152/141
Winters et al., Paper XXXVIII 2017AJ....153...14W 2017AJ....153...14W, Cat. J/AJ/153/14
Subasavage et al., Paper XXXIX 2017AJ....154...32S 2017AJ....154...32S, Cat. J/AJ/154/32
Bartlett et al., Paper XXXX 2017AJ....154..151B 2017AJ....154..151B, Cat. J/AJ/154/151
Clements et al., Paper XLI 2017AJ....154..124C 2017AJ....154..124C, This catalog
Jao et al., Paper XLII 2017AJ....154..191J 2017AJ....154..191J, Cat. J/AJ/154/191
Riedel et al., Paper XLIII 2018AJ....156...49R 2018AJ....156...49R, Cat. J/AJ/156/49
Henry et al., Paper XLIV 2018AJ....155..265H 2018AJ....155..265H, Cat. J/AJ/155/265
Winters et al., Paper XLV 2019AJ....157..216W 2019AJ....157..216W, Cat. J/AJ/157/216
Vrijmoet et al., Paper XLVI 2020AJ....160..215V 2020AJ....160..215V, Cat. J/AJ/160/215
Dieterich et al., Paper XLVII 2021AJ....161..172D 2021AJ....161..172D, Cat. J/AJ/161/172
Paredes et al., Paper XLVIII 2021AJ....162..176P 2021AJ....162..176P, Cat. J/AJ/162/176
Vrijmoet et al., Paper XLIX 2022AJ....163..178V 2022AJ....163..178V, Cat. J/AJ/163/178
Hubbard-James et al., Paper L 2022AJ....164..174H 2022AJ....164..174H
Kar et al., Paper LI 2024AJ....167..196K 2024AJ....167..196K, Cat. J/AJ/167/196
(End) Tiphaine Pouvreau [CDS] 08-Jun-2018