J/MNRAS/444/3517 BCool survey of solar-type stars (Marsden+ 2014)
A BCool magnetic snapshot survey of solar-type stars.
Marsden S.C., Petit P., Jeffers S.V., Morin J., Fares R., Reiners A.,
do Nascimento J.-D Jr, Auriere M., Bouvier J., Carter B.D., Catala C.,
Dintrans B., Donati J.-F., Gastine T., Jardine M., Konstantinova-Antova R.,
Lanoux J., Lignieres F., Morgenthaler A., Ramirez-Velez J.C., Theado S.,
Van Grootel V., (the BCool Collaboration)
<Mon. Not. R. Astron. Soc., 444, 3517-3536 (2014)>
=2014MNRAS.444.3517M 2014MNRAS.444.3517M
ADC_Keywords: Surveys ; Stars, G-type ; Magnetic fields
Keywords: line: profiles - magnetic fields - stars: activity
Abstract:
We present the results of a major high-resolution spectropolarimetric
BCool project magnetic survey of 170 solar-type stars. Surface
magnetic fields were detected on 67 stars, with 21 classified as
mature solar-type stars, a result that increases by a factor of 4 the
number of mature solar-type stars on which magnetic fields have been
observed. In addition, a magnetic field was detected for 3 out of 18
of the subgiant stars surveyed. For the population of K-dwarfs, the
mean value of |Bl| (|Bl|mean) was also found to be higher (5.7G)
than |Bl|mean measured for the G-dwarfs (3.2G) and the F-dwarfs
(3.3G). For the sample as a whole, |Bl|mean increases with rotation
rate and decreases with age, and the upper envelope for |Bl|
correlates well with the observed chromospheric emission. Stars with a
chromospheric S-index greater than about 0.2 show a high magnetic
field detection rate and so offer optimal targets for future studies.
This survey constitutes the most extensive spectropolarimetric survey
of cool stars undertaken to date, and suggests that it is feasible to
pursue magnetic mapping of a wide range of moderately active
solar-type stars to improve our understanding of their surface fields
and dynamos.
Description:
The goal of the BCool spectropolarimetric survey is to observe as many
of the bright (V≲9.0) solar-type stars as possible to further our
understanding of the magnetic activity of cool stars. In this first
paper, we present the spectropolarimetric snapshots of 170 solar-type
stars that we have observed starting in 2006 until 2013 as part of the
BCool survey.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 224 170 The stellar parameters of the BCool solar-type
star sample
table3.dat 129 170 Results from the analysis of the stellar LSD
profiles of the BCool solar-type stars sample
table6.dat 167 170 The chromospheric activity of the BCool sample
(table labelled "table5" in the Supporting
Information of the electronic version of the paper)
tableb1.dat 96 170 Summary of the number of observations of each star
at each observing epoch in the BCool sample
refs.dat 82 29 References
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Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP ? HIPPARCOS number
8- 9 A2 --- SG [SG ] Subgiant flag, SG: subgiant
11 A1 --- Bin [B] Binary flag, B: Binary
13- 16 I4 --- SPOCS [0/1025]? SPOCS ID number
18- 23 I6 --- HD ? HD number
25 A1 --- m_HD HD suffix (i.e. A, B etc.)
27- 35 A9 --- Name Star name
37- 44 A8 --- SpType Spectral type from SIMBAD
46- 49 I4 K Teff [4085/6522]? Effective temperature
51- 53 I3 K E_Teff [11/150]? Positive error in Teff
55- 57 I3 K e_Teff [11/150]? Negative error in Teff
59- 62 F4.2 [cm/s2] logg [3.4/4.7]? Surface gravity
64- 67 F4.2 [cm/s2] E_logg [0.01/0.1]? Positive error in surface gravity
69- 72 F4.2 [cm/s2] e_logg [0.01/0.1]? Negative error in surface gravity
74- 79 F6.3 [Sun] [M/H] [-1.2/0.3]? Metallicity
81 A1 --- f_[M/H] [*] *: Metallicity value from (Fe/H)
83- 86 F4.2 [-] E_[M/H] [0/0.2]? Positive error in metallicity
88- 91 F4.2 [-] e_[M/H] [0/0.2]? Negative error in metallicity
93- 98 F6.3 [Lsun] log(L) [-1.1/1.2]? Luminosity
100-104 F5.3 [Lsun] E_log(L) [0/0.12]? Positive error in luminosity
106-110 F5.3 [Lsun] e_log(L) [0/0.12]? Negative error in luminosity
112-116 F5.2 Gyr Age [0/12.5]? Age
118-121 F4.2 Gyr E_Age [0.02/9.2]? Positive error in age
123-127 F5.2 Gyr e_Age [0/12]? Negative error in age
129-133 F5.3 Msun Mass [0.6/2.6]? Star Mass
135-139 F5.3 Msun E_Mass [0.002/0.64]? Positive error in mass
141-145 F5.3 Msun e_Mass [0.002/0.42]? Negative error in mass
147-152 F6.4 Rsun Rad [0.6/4]? Star Radius
154-159 F6.4 Rsun E_Rad [0/0.2]? Positive error in radius
161-166 F6.4 Rsun e_Rad [0/0.3]? Negative error in radius
168-172 F5.3 Rsun Rcz [0/2]? Radius of convection zone
174-178 F5.3 Rsun E_Rcz [0/0.13]? Positive error in Rcz
180-184 F5.3 Rsun e_Rcz [0/0.13]? Negative error in Rcz
186-189 F4.1 km/s vsini [0/55]? Rotational velocity
191-193 F3.1 km/s E_vsini [0/0.8]? Positive error in vsini
195-197 F3.1 km/s e_vsini [0/0.8]? Negative error in vsini
199-204 F6.3 [-] logRo [-1.12/0.5] log(Rossby number)
206-210 F5.3 [-] E_logRo [0/0.54] Positive error in logRo
212-216 F5.3 [-] e_logRo [0/0.12] Negative error in logRo
218-224 A7 --- Refs References, in refs.dat file
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP ? HIPPARCOS number
8- 16 A9 --- Name Other name
18- 19 A2 --- SG [SG ] Subgiant flag, SG: subgiant
21 A1 --- Bin [B] Binary flag, B: Binary
23- 29 A7 "date" ObsDate Date of observation
31- 32 I2 --- ObsN [1/8] Observation Number
34- 39 F6.1 km/s RV [-113/121] Radial velocity this work
41- 48 F8.3 km/s RV2 [-113/121]? Radial velocity Nidever et al. 2002
(J/ApJS/141/503)
50- 54 F5.3 km/s e_RV2 [0.1/8.9]? Error in RV2
56- 57 A2 --- f_RV2 [VF NS] Radial velocity flag (1)
59- 63 I5 --- SNR [6422/75344] Signal-to-noise of LSD profile (2)
65- 69 I5 --- Nlin [6087/14742] Number of lines used for LSD (2)
71 A1 --- Det? [DMN] Magnetic detection flag: D=definitive,
M=marginal, N=no detection
73 A1 --- u_Det? [Da] Non-reliable detection flag (3)
75- 83 E9.3 --- FAP [0/0.992] False alarm probability
85- 88 I4 --- Vmin [-122/115] Minimum velocity used (Eq.(6))
90- 93 I4 --- Vmax [-103/126] Maximum velocity used (Eq.(6))
95-100 F6.1 10-4T Bl [-289/46] Longitudinal magnetic field
102-105 F4.1 10-4T e_Bl [0.1/17.2] Error in longitudinal magnetic field
107-111 F5.1 10-4T Nl [-17/40] Magnetic field measured from
Null profile
113-116 F4.1 10-4T e_Nl [0.1/18] Error in Null magnetic field
118-120 I3 --- Nobs [1/112] Total number of observations
122-124 I3 --- Ndet [0/101] Number of definite detections
126 I1 --- Nm [0/7] Number of marginal detections
128-129 I2 --- Nn [0/45] Number of non detections
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Note (1): Radial velocity flag as follows:
VF = Radial velocity from Valenti & Fischer
(2005ApJS..159..141V 2005ApJS..159..141V, Cat. J/ApJS/159/141)
NS = Non-radial velocity standard according to Nidever et al.
(2002ApJS..141..503N 2002ApJS..141..503N, Cat. J/ApJS/141/503)
Note (2): LSD = Leat-Squares Deconvolution
Note (3): Magnetic detection flag as follows:
D = The definite detection was unreliable due to noise and a non-detection
was chosen
a = significant signal in null profile
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP ? HIPPARCOS number
8- 16 A9 --- Name Other name
18- 19 A2 --- SG [SG] Subgiant flag, SG: subgiant
21 A1 --- Bin [B] Binary flag, B: Binary
23- 27 F5.3 --- B-V [0.3/1.4] B-V measure from HIPPARCOS
29 A1 --- n_B-V [W] "W" if B-V value from Wright et al. 2004
(J/ApJS/152/261)
31- 35 F5.3 --- S1 [0.1/1.3]? S-index (Ca H&K activity) from
Wright et al. 2004 (J/ApJS/152/261)
37- 42 F6.4 --- S [0.1/1.5] S-index, this work
44- 49 F6.4 --- e_S [0/0.14] Error in the S-index from this work
51- 55 F5.2 [-] logR'HK [-5.3/-4.1] log(R'HK) activity index
from individual observations
57- 60 F4.2 [-] E_logR'HK [0/0.25] Positive error in logR'HK
62- 65 F4.2 [-] e_logR'HK [0/0.62] Negative error in logR'HK
67- 72 F6.3 Gyr Age1 [0/14.3] Age from chromospheric activity
74- 79 F6.3 Gyr E_Age1 [0/22.2] Positive error in Age1
81- 85 F5.3 Gyr e_Age1 [0/4.2] Negative error in Age1
87- 90 F4.1 d Per [0.8/65] Rotational period estimated from
chromospheric activity
92- 95 F4.1 d E_Per [0/59] Positive error in Per
97- 99 F3.1 d e_Per [0/6] Negative error in Per
101-105 F5.2 [-] b_logR'HK [-5.3/-4.1] Minimum log(R'HK) in observations
107-111 F5.2 [-] B_logR'HK [-5.3/-3.7] Maximum log(R'HK) in observations
113-118 F6.4 --- CaT [0.61/1.12] Ca Infra-Red Triplet Index (4)
120-125 F6.4 --- e_CaT [0/0.05] Error in CaT
127-132 F6.4 --- b_CaT [0.61/1.1] Minimum CaT in observations
134-139 F6.4 --- B_CaT [0.61/1.2] Maximum CaT in observations
141-146 F6.4 --- Ha [0.27/0.4] Hα index (4)
148-153 F6.4 --- e_Ha [0/0.015] Error in Hα index
155-160 F6.4 --- b_Ha [0.27/0.40] Minimum Hα index
162-167 F6.4 --- B_Ha [0.27/0.41] Maximum Hα index
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Note (4): The Calcium Triplet (CaT) and Hα indexes are defined from
fluxes in rectangular bandpasses (in Å):
CaT = [F(8498,2)+F(8542,2)+F(8662,2)] / [F(8475.8,5)+F(8704.9,5)]
Hα = F(6562.85,3.6) / [F(6558.85,2.2)+F(6567.30,2.2)]
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Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP ? HIPPARCOS number
8- 16 A9 --- Name Other name
18- 19 A2 --- SG [SG] Subgiant flag, SG: subgiant
21 A1 --- Bin [B] Binary flag, B: Binary
23- 24 I2 --- R01 ? TBL 2006 Nov - Nov observing run (6)
26- 27 I2 --- R02 ? CFH 2006 Nov - Dec observing run (6)
29- 30 I2 --- R03 ? TBL 2007/08 Jun - Feb observing run (6)
32- 33 I2 --- R04 ? TBL 2007 May - May observing run (6)
35- 36 I2 --- R05 ? TBL 2007 Jul - Aug observing run (6)
38- 39 I2 --- R06 ? TBL 2007 Nov - Nov observing run (6)
41- 42 I2 --- R07 ? CFH 2007 Dec - Dec observing run (6)
44- 45 I2 --- R08 ? TBL 2007/08 Dec - Jan observing run (6)
47- 48 I2 --- R09 ? TBL 2008 Jan - Feb observing run (6)
50- 51 I2 --- R10 ? CFH 2008 Mar - Mar observing run (6)
53- 54 I2 --- R11 ? TBL 2008 May - May observing run (6)
56- 57 I2 --- R12 ? CFH 2008 Jun - Jul observing run (6)
59- 60 I2 --- R13 ? TBL 2008 Jul - Aug observing run (6)
62- 63 I2 --- R14 ? TBL 2009 Jan - Jan observing run (6)
65- 66 I2 --- R15 ? TBL 2009 May - Jul observing run (6)
68- 69 I2 --- R16 ? CFH 2009/10 Sep - Jan observing run (6)
71- 72 I2 --- R17 ? TBL 2009/10 Dec - Feb observing run (6)
74- 75 I2 --- R18 ? TBL 2010 Mar - Aug observing run (6)
77- 78 I2 --- R19 ? TBL 2010/11 Sep - Feb observing run (6)
80- 81 I2 --- R20 ? CFH 2011 Feb - Jul observing run (6)
83- 84 I2 --- R21 ? TBL 2011 Mar - Aug observing run (6)
86- 87 I2 --- R22 ? TBL 2011/12 Oct - Feb observing run (6)
89- 90 I2 --- R23 ? TBL 2012 Mar - Aug observing run (6)
92- 93 I2 --- R24 ? TBL 2012/13 Oct - Jan observing run (6)
95- 96 I2 --- R25 ? TBL 2013 Mar - Aug observing run (6)
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Note (6): Telescopes:
TBL = Telescope Bernard Lyot
CFHT = Canada-France-Hawaii Telescope
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 60 A37 --- Aut Author's name
62- 82 A21 --- Com Comments
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History:
* 23-Sep-2015: From electronic version of the journal
* 06-Nov-2015: For HIP 67275, HD 120126 corrected into HD 120136 (table 1)
(End) Patricia Vannier [CDS] 29-Apr-2015