J/ApJ/798/73 BANYAN All-Sky Survey (BASS) catalog. V. Nearby YMGs (Gagne+, 2015)
BANYAN.
V. A systematic all-sky survey for new very late-type low-mass stars and brown
dwarfs in nearby young moving groups.
Gagne J., Lafreniere D., Doyon R., Malo L., Artigau E.
<Astrophys. J., 798, 73 (2015)>
=2015ApJ...798...73G 2015ApJ...798...73G
ADC_Keywords: Stars, late-type ; Spectral types ; Radial velocities ;
Proper motions ; Photometry, infrared ; Surveys ; Stars, masses
Keywords: brown dwarfs; methods: data analysis; proper motions;
stars: kinematics and dynamics; stars: low-mass
Abstract:
We present the BANYAN All-Sky Survey (BASS) catalog, consisting of 228
new late-type (M4-L6) candidate members of nearby young moving groups
(YMGs) with an expected false-positive rate of ∼13%. This sample
includes 79 new candidate young brown dwarfs and 22 planetary-mass
objects. These candidates were identified through the first systematic
all-sky survey for late-type low-mass stars and brown dwarfs in YMGs.
We cross-matched the Two Micron All Sky Survey and AllWISE catalogs
outside of the galactic plane to build a sample of 98970 potential
≥M5 dwarfs in the solar neighborhood and calculated their proper
motions with typical precisions of 5-15mas/yr. We selected highly
probable candidate members of several YMGs from this sample using the
Bayesian Analysis for Nearby Young AssociatioNs II tool (BANYAN II,
see Gagne+, 2014, J/ApJ/783/121). We used the most probable
statistical distances inferred from BANYAN II to estimate the spectral
type and mass of these candidate YMG members. We used this unique
sample to show tentative signs of mass segregation in the AB Doradus
moving group and the Tucana-Horologium and Columba associations. The
BASS sample has already been successful in identifying several new
young brown dwarfs in earlier publications, and will be of great
interest in studying the initial mass function of YMGs and for the
search of exoplanets by direct imaging; the input sample of potential
close-by ≥M5 dwarfs will be useful to study the kinematics of
low-mass stars and brown dwarfs and search for new proper motion
pairs.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 104 275 BASS catalog resulting from an all-sky search for
>M5 candidates in Young Moving Groups (YMGs)
table4.dat 98 35 Known YMG candidate members not recovered in BASS
table5.dat 108 274 The updated BASS sample
table6.dat 116 98970 All-Sky input sample of nearby, potential >M5
objects
table8.dat 108 345 The complete low-priority "LP-BASS" catalog
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See also:
III/272 : RAVE 4th data release (Kordopatis+, 2013)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
J/ApJ/788/81 : BANYAN III. RVel and rotation of low-mass stars (Malo+, 2014)
J/ApJ/783/121 : BANYAN II. Nearby young assoc. cand. members (Gagne+, 2014)
J/AJ/147/146 : Spectroscopy of Tuc-Hor candidate members (Kraus+, 2014)
J/AJ/147/94 : Solar neighborhood. XXXII. L and M dwarfs (Dieterich+, 2014)
J/AJ/147/85 : Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)
J/A+A/564/A55 : 1.1-2.4um spectra of 7 young M & L dwarfs (Manjavacas+, 2014)
J/AJ/147/34 : SpeX library of L-type dwarfs (Schneider+, 2014)
J/A+A/562/A127 : NIR integral field spectra of 15 M-L dwarfs (Bonnefoy+, 2014)
J/AJ/147/20 : Spectroscopy of 447 nearby M dwarfs (Newton+, 2014)
J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)
J/A+A/556/A15 : Effective temperature scale of M dwarfs (Rajpurohit+, 2013)
J/ApJS/205/6 : T dwarf population revealed by WISE (Mace+, 2013)
J/AJ/145/52 : Late K & M dwarf abundances in binary systems (Mann+, 2013)
J/ApJ/762/88 : Young stellar kinematic group candidate members (Malo+, 2013)
J/ApJ/758/56 : Young M dwarfs within 25pc. II. Kinematics (Shkolnik+, 2012)
J/AJ/144/99 : Near-IR spectroscopy of 36 late M dwarfs (Deshpande+, 2012)
J/ApJ/754/44 : The AstraLux Large M-dwarf Survey (Janson+ 2012)
J/ApJ/752/56 : BDKP. III. Parallaxes for 70 ultracool dwarfs (Faherty+, 2012)
J/ApJ/748/93 : K-band spectra for 133 nearby M dwarfs (Rojas-Ayala+, 2012)
J/AJ/143/80 : R Low-mass stars of beta Pic & AB Dor (Schlieder+, 2012)
J/MNRAS/418/1231 : New brown dwarfs in upper Sco (Dawson+, 2011)
J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)
J/AJ/142/103 : Cool evolved stars in SAGE-SMC (Boyer+, 2011)
J/ApJ/723/684 : NIRSPEC ultracool dwarf radial velocity survey (Blake+, 2010)
J/ApJS/190/100 : NIR proper motion survey using 2MASS (Kirkpatrick+, 2010)
J/AJ/140/119 : βPic and AB Dor moving groups members (Schlieder+, 2010)
J/AJ/139/1808 : Colors and kinematics of SDSS L dwarfs (Schmidt+, 2010)
J/A+A/512/A37 : Velocities of 43 nearby L dwarfs (Seifahrt+, 2010)
J/ApJ/705/1416 : Volume-limited sample of M7-M9.5 dwarfs <20pc (Reiners+, 2009)
J/ApJ/699/649 : Young M dwarfs within 25pc. I. (Shkolnik+, 2009)
J/AJ/137/1 : PMs & astrometry of late-type dwarfs (Faherty+, 2009)
J/ApJ/689/1295 : Lithium test implications for BD* (Kirkpatrick+, 2008)
J/AJ/136/1290 : Ultracool dwarfs from the 2MASS (Reid+, 2008)
J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)
J/AJ/133/2258 : Activity and kinematics of ultracool dwarfs (Schmidt+, 2007)
J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)
J/AJ/132/891 : Binaries among nearby L dwarfs (Reid+, 2006)
J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/AJ/131/2722 : New L and T dwarfs from the SDSS (Chiu+, 2006)
J/PASP/118/659 : RI photometry of 2MASS late M and L dwarfs (Liebert+, 2006)
J/A+A/446/515 : Distances of nearby ultracool dwarfs (Phan-Bao+, 2006)
J/AJ/130/1871 : Spectroscopic survey of M dwarfs (Bochanski+, 2005)
J/A+A/430/165 : Radial velocities for 6691 K and M giants (Famaey+, 2005)
J/AJ/127/3553 : JHK photometry & spectroscopy for L & T dwarfs (Knapp+, 2004)
J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)
J/MNRAS/328/45 : Late-type stars members of young groups (Montes+, 2001)
J/AJ/113/806 : M-Subdwarfs (Gizis 1997)
http://www.astro.umontreal.ca/~gagne/banyanII.php : BANYAN II web tool
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Sam Sample class: "High" (contamination probability
<10%), or "Modest"
8- 23 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
25 A1 --- f_W1mag [b] WISE catalog instead of ALLWISE (1)
27- 30 A4 --- SpT Estimated MK spectral type
32- 36 F5.2 mag Jmag [9.2/17] 2MASS J band magnitude
38- 42 F5.2 mag Hmag 2MASS H band magnitude
44- 48 F5.2 mag Ksmag [8.2/15.1] 2MASS Ks band magnitude
50- 54 F5.2 mag W1mag [8/14.4] WISE/W1 3.4 micron band magnitude
56- 60 F5.2 mag W2mag [7.9/14.1] WISE/W2 4.6 micron band magnitude
62- 67 F6.1 mas/yr pmRA [-367/367] Proper motion in Right Ascension
µαcosδ
69- 72 F4.1 mas/yr e_pmRA [0.7/17] Uncertainty in pmRA
74- 79 F6.1 mas/yr pmDE [-624/313] Proper motion in Declination
81- 84 F4.1 mas/yr e_pmDE [5/21] Uncertainty in pmDE
86- 90 A5 --- YMG Most probable membership (G1)
92 A1 --- f_YMG [a] More probable binarity (2)
94- 97 F4.1 % Pmb [0/100] Bayesian membership probability
99 A1 --- l_Pfc Limit flag on Pfc
101-104 F4.1 % Pfc [0/49] Field contamination probability
--------------------------------------------------------------------------------
Note (1):
b = Object from the WISE catalog (II/311) rather than ALLWISE (II/328).
Note (2):
a = The binary hypothesis is more probable than the single hypothesis
(see Section 3).
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
18- 25 A8 --- SpT Measured MK spectral type (1)
27- 39 A13 --- YMG Known candidacy (G1)
41- 43 I3 --- r_YMG [31/105] Reference (2)
45- 98 A54 --- Rej Reason(s) for rejection (3)
--------------------------------------------------------------------------------
Note (1):
a = Measured in the NIR unless symbol otherwise specified.
Note (2): Reference code as follows:
31 = Gagne et al. 2014ApJ...783..121G 2014ApJ...783..121G
53 = Kraus et al. 2014, J/AJ/147/146
62 = Liu et al. 2013ApJ...777L..20L 2013ApJ...777L..20L
67 = Malo et al. 2013, J/ApJ/762/88
69 = Mamajek E.E. 2005ApJ...634.1385M 2005ApJ...634.1385M
90 = Rodriguez et al. 2013ApJ...774..101R 2013ApJ...774..101R
93 = Schlieder et al. 2012AJ....144..109S 2012AJ....144..109S
97 = Schneider et al. 2014, J/AJ/147/34
100 = Shkolnik et al. 2012, J/ApJ/758/56
105 = Bonnefoy et al. 2009A&A...506..799B 2009A&A...506..799B
Note (3): Reasons for rejection (see sections 2-3 for detailed descriptions):
WISE = no entry in the WISE and AllWISE catalogs
b = absolute galactic latitude is too low
B-V = B-V color is too blue
B-J = B-J color is too blue
V-J = V-J color is too blue
J-H = J-H color is too blue
H-KS = H-KS color is too blue
KS-W1 = KS-W1 color is too blue
W1-W2 = W1-W2 color is too blue
χ2W1 = the reduced χ2 from the adjusted profile in the
W1 band is too large.
2MPH = 2MASS photometric quality is too low
2MBL = a blend flag is suspicious in 2MASS
2MCC = a contamination flag is suspicious in 2MASS
2MPROX = a close-by 2MASS source is unresolved in AllWISE
W1SAT = W1 magnitude is saturated
W2SAT = W2 magnitude is saturated
WCC = a contamination flag is suspicious in AllWISE
JKCMD = the object falls to the left of the MW1 versus J-Ks field
sequence using its statistical distance
HW2CMD = the object falls to the left of the MW1 versus H-W2 field
sequence using its statistical distance
USco = the object is too close to Upper Scorpius
2M# = the object has too many immediate neighbors in 2MASS
σµ = the 2MASS-AllWISE proper motion is not precise enough
µ = the proper motion is too low
P = the Bayesian probability is too low
C = the contamination probability is too high
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Byte-by-byte Description of file: table[58].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Sam Sample class: "High" (contamination probability
<10%), or "Modest"
8- 23 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
25- 43 A19 --- SpT BASS MK spectral type (1)
44 A1 --- f_SpT [p] p: estimated SpT from photometry
46- 50 A5 --- YMG Most probable membership (G1)
52 A1 --- l_Pmb Limit flag on PMm
54- 57 F4.1 % Pmb Bayesian membership probability
59 A1 --- l_Pfc Limit flag on Pfc
61- 64 F4.1 % Pfc Field contamination probability
66- 72 F7.1 Mjup Mass [5/404]?=-1047.2 Estimated Mass in Jupiter masses
74- 77 F4.1 Mjup E_Mass ? Upper error bar on Mass
79- 82 F4.1 Mjup e_Mass ? Lower error bar on Mass
84- 87 F4.1 pc Dist [9/82] Statistical distance (2)
89- 92 F4.1 pc E_Dist ? Upper error bar on Dist
94- 97 F4.1 pc e_Dist Lower error bar on Dist
99-103 F5.1 km/s RVel [-21/30] Statistical radial velocity (2)
105-108 F4.1 km/s e_RVel [0.2/15] Uncertainty in RVel
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Note (1): the : and :: symbols mean uncertain spectral types to ±1 and
±2 subtypes respectively; p indicates a peculiar spectrum; β
indicates intermediate gravity and γ indicates very low gravity.
Note (2): Prediction from BANYAN II (see Gagne+, 2014, J/ApJ/783/121).
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Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 A16 --- 2MASS 2MASS identifier (HHMMSSss+DDMMSSs; J2000)
18- 22 F5.2 mag Jmag [9.1/17.4] 2MASS J band magnitude
24- 27 F4.2 mag e_Jmag Uncertainty in Jmag
29- 33 F5.2 mag Hmag 2MASS H band magnitude
35- 38 F4.2 mag e_Hmag Uncertainty in Hmag
40- 44 F5.2 mag Ksmag [8.2/15.9] 2MASS Ks band magnitude
46- 49 F4.2 mag e_Ksmag Uncertainty in Kmag
51- 68 A18 --- AllWISE AllWISE identifier (Cat. II/328;
HHMMSS.ss+DDMMSS.s; J2000)
70- 74 F5.2 mag W1mag [8/15.7] WISE/W1 3.4 micron band magnitude
76- 79 F4.2 mag e_W1mag Uncertainty in W1mag
81- 85 F5.2 mag W2mag [7.8/15.5] WISE/W1 4.6 micron band magnitude
87- 90 F4.2 mag e_W2mag Uncertainty in W2mag
92- 98 F7.1 mas/yr pmRA [-2260/1861] Proper motion in Right Ascension
times cos(DE)
100-103 F4.1 mas/yr e_pmRA [0.1/71] Uncertainty in pmRA
105-111 F7.1 mas/yr pmDE [-2415/2422] Proper motion in Declination
113-116 F4.1 mas/yr e_pmDE [5/88] Uncertainty in pmDE
--------------------------------------------------------------------------------
Global notes:
Note (G1): Young moving groups (YMGs) are:
ARG = Argus (30-50 Myr; Makarov & Urban 2000MNRAS.317..289M 2000MNRAS.317..289M)
COL = Columba (20-40 Myr; Torres et al. 2008hsf2.book..757T 2008hsf2.book..757T)
BPMG = β Pictoris (Zuckerman et al. 2001ApJ...562L..87Z 2001ApJ...562L..87Z; 20-26 Myr;
Mamajek & Bell 2014MNRAS.445.2169M 2014MNRAS.445.2169M; Malo et al. 2014ApJ...792...37M 2014ApJ...792...37M;
Binks & Jeffries 2014MNRAS.438L..11B 2014MNRAS.438L..11B)
ABDMG = AB Doradus (Zuckerman et al. 2004ApJ...613L..65Z 2004ApJ...613L..65Z;
110-130 Myr; Luhman et al. 2005ApJ...628L..69L 2005ApJ...628L..69L;
Barenfeld et al. 2013ApJ...766....6B 2013ApJ...766....6B)
CAR = Carina (20-40 Myr; Torres et al. 2008hsf2.book..757T 2008hsf2.book..757T)
TWA = TW Hydrae association (de La Reza et al. 1989ApJ...343L..61D 1989ApJ...343L..61D;
Kastner et al. 1997Sci...277...67K 1997Sci...277...67K;
Zuckerman & Song 2004, J/other/ARA+A/42.685;
5-15 Myr; Weinberger et al. 2013ApJ...762..118W 2013ApJ...762..118W)
THA = Tucana-Horologium (Torres et al. 2000AJ....120.1410T 2000AJ....120.1410T;
Zuckerman & Webb 2000ApJ...535..959Z 2000ApJ...535..959Z;
20-40 Myr; Kraus et al. 2014, J/AJ/147/146)
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History:
From electronic version of the journal
References:
Malo et al. Paper I. 2013ApJ...762...88M 2013ApJ...762...88M Cat. J/ApJ/762/88
Gagne et al. Paper II. 2014ApJ...783..121G 2014ApJ...783..121G Cat. J/ApJ/783/121
Malo et al. Paper III. 2014ApJ...788...81M 2014ApJ...788...81M Cat. J/ApJ/788/81
Malo et al. Paper IV. 2014ApJ...792...37M 2014ApJ...792...37M
Artigau et al. Paper VI. 2015ApJ...806..254A 2015ApJ...806..254A
Gagne et al. Paper VII. 2015ApJS..219...33G 2015ApJS..219...33G Cat. J/ApJS/219/33
Boucher et al. Paper VIII. 2016ApJ...832...50B 2016ApJ...832...50B
Gagne et al. Paper IX. 2017ApJS..228...18G 2017ApJS..228...18G
Desrochers et al. Paper X. 2018ApJ...852...55D 2018ApJ...852...55D
Gagne et al. Paper XI. 2018ApJ...856...23G 2018ApJ...856...23G Cat. J/ApJ/856/23
Gagne et al. Paper XII. 2018ApJ...860...43G 2018ApJ...860...43G Cat. J/ApJ/860/43
Gagne et al. Paper XIII. 2018ApJ...862..138G 2018ApJ...862..138G
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-May-2015