J/A+A/583/A85 Binaries in beta Pic moving group (Alonso-Floriano+, 2015)
Reaching the boundary between stellar kinematic groups and very wide binaries.
III. Sixteen new stars and eight new wide systems in the β Pictoris
moving group.
Alonso-Floriano F.J., Caballero J.A., Cortes-Contreras M., Solano E.,
Montes D.
<Astron. Astrophys., 583, A85-85 (2015)>
=2015A&A...583A..85A 2015A&A...583A..85A (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, double and multiple ; Proper motions ;
Photometry
Keywords: binaries: general - Galaxy: kinematics and dynamics -
open clusters and associations: individual: beta Pictoris -
binaries: visual
Abstract:
We look for common proper motion companions to stars of the nearby
young β Pictoris moving group. First, we compiled a list of 185
β Pictoris members and candidate members from 35 representative
works. Next, we used the Aladin and STILTS virtual observatory tools
and the PPMXL proper motion and Washington Double Star catalogues to
look for companion candidates. The resulting potential companions were
subjects of a dedicated astro-photometric follow-up using public data
from all-sky surveys. After discarding 67 sources by proper motion and
31 by colour-magnitude diagrams, we obtained a final list of 36 common
proper motion systems. The binding energy of two of them is perhaps
too small to be considered physically bound. Of the 36 pairs and
multiple systems, eight are new, 16 have only one stellar component
previously classified as a β Pictoris member, and three have
secondaries at or below the hydrogen-burning limit. Sixteen stars are
reported here for the first time as moving group members. The
unexpected large number of high-order multiple systems, 12 triples and
two quadruples among 36 systems, may suggest a biased list of members
towards close binaries or an increment of the high-order-multiple
fraction for very wide systems.
Description:
We have compiled in Table A.1 a list of 185 β Pictoris members
and member candidates around which we looked for common proper-motion
companions. We gathered them from 35 previous works published in the
past 16 years.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 100 185 Investigated β Pictoris members and
member candidates
tablea2.dat 87 77 Unresolved or unidentified systems
tablea3.dat 156 184 Astrometry measurements
tablea4.dat 159 119 Photometry measurements
tablea5.dat 192 72 Common proper-motion companion candidates
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 26 A26 --- Name Name
28- 29 I2 h RAh Right ascension (J2000)
31- 32 I2 min RAm Right ascension (J2000)
34- 38 F5.2 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 50 F4.1 arcsec DEs Declination (J2000)
52- 58 F7.3 pc Dist Distance
61- 65 F5.2 pc E_Dist ? Error on dist (upper value)
67- 71 F5.2 pc e_Dist ? Error on dist (lower value)
75- 98 A24 --- r_Dist Reference for distance (1)
100 I1 --- Memb [1/3] Membership flag (2)
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Note (1): References as follows:
Binks & Jeffries (2013) = 2014MNRAS.438L..11B 2014MNRAS.438L..11B
Elliott et al. (2014) = 2014A&A...568A..26E 2014A&A...568A..26E, Cat. J/A+A/568/A26
Faherty et al. (2012) = 2012ApJ...752...56F 2012ApJ...752...56F, Cat. J/ApJ/752/56
Gagne et al. (2014) = 2014ApJ...783..121G 2014ApJ...783..121G, Cat. J/ApJ/783/121
Gagne et al. (2015) = 2015ApJ...798...73G 2015ApJ...798...73G, Cat. J/ApJ/798/73
Holmberg et al (2009) = 2009A&A...501..941H 2009A&A...501..941H, Cat. V/130
Kastner et al. (2011) = 2011ApJ...740L..17K 2011ApJ...740L..17K
Lepine & Gaidos (2011) = 2011AJ....142..138L 2011AJ....142..138L, Cat. J/AJ/142/138
Malo et al. (2013) = 2013ApJ...762...88M 2013ApJ...762...88M, Cat. J/ApJ/762/88
Malo et al. (2014a) = 2014ApJ...788...81M 2014ApJ...788...81M, Cat. J/ApJ/788/81
Malo et al. (2014b) = 2014ApJ...792...37M 2014ApJ...792...37M
McCarthy & White (2012) = 2012AJ....143..134M 2012AJ....143..134M, Cat. J/AJ/143/134
Riedel et al. (2014) = 2014AJ....147...85R 2014AJ....147...85R, Cat. J/AJ/147/85
Rodriguez et al. (2014) = 2014A&A...567A..20R 2014A&A...567A..20R
Schlieder et al. (2012a) = 2012AJ....143...80S 2012AJ....143...80S, Cat. J/AJ/143/80
Schlieder et al. (2012b) = 2012AJ....144..109S 2012AJ....144..109S
Shkolnik et al. (2012) = 2012ApJ...758...56S 2012ApJ...758...56S, Cat. J/ApJ/758/56
van Altena et al. (1995) = Yale Trigonometric Parallaxes, Cat. I/238
van Leeuwen (2007) = 2007A&A...474..653V 2007A&A...474..653V, Cat. I/311
Note (2): Membership flag as follows:
1 = Uncontrovertible moving group members for which at least two independent
research groups have declared them to be bonafide moving group members
and whose memberships have not been put in doubt afterwards. In general,
these objects have coherent kinematics (with reliable distance and
radial velocity determination) and youth features (coronal X-ray and
chromospheric Hα emission, lithium in absorption and, in
some cases, debris discs).
2 = Moving-group member candidates for which there is no definitive
confirmation of true membership.
3 = Dubious moving group member candidates that have also been proposed as
belonging to other young moving groups of similar kinematics, or even to
the field. We include them in our work for completeness.
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 25 A25 --- Name Name
27- 51 A25 --- Disc Discovery name or discovery reference (1)
53- 60 A8 --- Status Status
63- 67 F5.2 arcsec rho ?=- Angular separation
68 A1 --- --- [-]
69- 72 F4.1 arcsec rho2 ? Upper value of rho interval
74- 76 I3 deg theta ?=- Position angle
78- 87 A10 --- WDS WDS identifier
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Note (1): References are:
Bowler et al. (2015) = 2015ApJS..216....7B 2015ApJS..216....7B, Cat. J/ApJS/216/7
Delfosse et al. (1999) = 1999A&A...344..897D 1999A&A...344..897D
Elliott et al. (2014) = 2014A&A...568A..26E 2014A&A...568A..26E, Cat. J/A+A/568/A26
Elliott et al. (2015) = 2015A&A...580A..88E 2015A&A...580A..88E, Cat. J/A+A/580/A88
Macintosh et al. (2015) = 2015Sci...350...64M 2015Sci...350...64M, Cat. J/other/Sci/350.64
Nordstrom et al. (2004) = 2004A&A...418..989N 2004A&A...418..989N, Cat. V/117
Schlieder et al. (2012b) = 2012AJ....144..109S 2012AJ....144..109S
Shkolnik et al. (2012) = 2012ApJ...758...56S 2012ApJ...758...56S, Cat. J/ApJ/758/56
Song et al. (2003) = 2003ApJ...599..342S 2003ApJ...599..342S
Strassmeier & Rice (2000) = 2000A&A...360.1019S 2000A&A...360.1019S
Torres et al. (2008) = in Handbook of Star Forming Regions, Volume II, 757
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 39 A39 --- Name Name
41- 42 I2 h RAh Right ascension (J2000)
44- 45 I2 min RAm Right ascension (J2000)
47- 51 F5.2 s RAs Right ascension (J2000)
53 A1 --- DE- Declination sign (J2000)
54- 55 I2 deg DEd Declination (J2000)
57- 58 I2 arcmin DEm Declination (J2000)
60- 63 F4.1 arcsec DEs Declination (J2000)
65- 70 F6.1 mas/yr pmRAP ?=- PPMXL proper motion along RA, pmRA*cosDE
72- 75 F4.1 mas/yr e_pmRAP ? rms uncertainty on pmRAP
77- 82 F6.1 mas/yr pmDEP ?=- PPMXL proper motion along DE
84- 87 F4.1 mas/yr e_pmDEP ? rms uncertainty on pmDEP
89- 96 F8.3 mas/yr pmRA Adopted proper motion along RA, pmRA*cosDE
98-102 F5.3 mas/yr e_pmRA rms uncertainty on pmRA
103-109 F7.2 mas/yr pmDE Adopted proper motion along DE
111-114 F4.2 mas/yr e_pmDE rms uncertainty on pmDE
116-122 F7.3 yr DT ?=- Time baseline, Δt, of the follow-up
124 I1 --- Ndetec ?=- Number of detection
126-134 A9 --- r_pmRA Origin of adopted proper motions
136-156 A21 --- Status Astrometric status
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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1- 26 A26 --- Name Name
28- 29 I2 h RAh Right ascension (J2000)
31- 32 I2 min RAm Right ascension (J2000)
34- 38 F5.2 s RAs Right ascension (J2000)
40 A1 --- DE- Declination sign (J2000)
41- 42 I2 deg DEd Declination (J2000)
44- 45 I2 arcmin DEm Declination (J2000)
47- 50 F4.1 arcsec DEs Declination (J2000)
52- 57 F6.3 mag Bmag B magnitude
58 A1 --- u_Bmag [*] Uncertainty flag on Bmag
60- 64 F5.3 mag e_Bmag ? rms uncertainty on Bmag
66- 71 F6.3 mag Vmag ?=- V magnitude
72 A1 --- u_Vmag [*] Uncertainty flag on Vmag
74- 78 F5.3 mag e_Vmag ? rms uncertainty on Vmag
80- 85 F6.3 mag r'mag ?=- r' magnitude
87- 91 F5.3 mag e_r'mag ? rms uncertainty on r'mag
93- 98 F6.3 mag Ksmag Ks magnitude
100-104 F5.3 mag e_Ksmag ? rms uncertainty on Ksmag
107-111 F5.2 pc Dist ? Distance
113-117 F5.2 pc e_Dist ? rms uncertainty on Dist
119-159 A41 --- Status Photometric status
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Byte-by-byte Description of file: tablea5.dat
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Bytes Format Units Label Explanations
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1 A1 --- Case [P] P for Previously known systems
3- 12 A10 --- WDS WDS designation
14- 23 A10 --- Disc Discovery name or new
25- 50 A26 --- Name Name
52- 53 I2 h RAh Right ascension (J2000)
55- 56 I2 min RAm Right ascension (J2000)
58- 62 F5.2 s RAs Right ascension (J2000)
64 A1 --- DE- Declination sign (J2000)
65- 66 I2 deg DEd Declination (J2000)
68- 69 I2 arcmin DEm Declination (J2000)
71- 74 F4.1 arcsec DEs Declination (J2000)
76- 80 F5.2 pc Dist ? Distance
82- 86 F5.2 pc e_Dist ? rms uncertainty on Dist
89- 93 F5.2 mag JMAG Absolute J magnitude
95- 98 F4.2 mag e_JMAG rms uncertainty on JMAG
101-113 A13 --- SpType MK spectral type
114-121 F8.3 arcsec rho ? Separation angle
125-127 I3 deg theta ? Position angle
132-136 F5.2 10+3AU s ? Maximum projected physical separation
141-144 F4.2 Msun Mass ? Mass of the primary
145 A1 --- --- [+]
146-149 F4.2 Msun Mass2 ? Mass of the secondary
150 A1 --- --- [+]
151-154 F4.2 Msun Mass3 ? Mass of the tertiary
155-161 F7.2 10+33J mUg* ? Opposit of reduced gravitational binding
energy (-Ug*)
164-192 A29 --- Com Comments
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History:
From electronic version of the journal
References:
Caballero, Paper I 2009A&A...507..251C 2009A&A...507..251C
Caballero, Paper II 2010A&A...514A..98C 2010A&A...514A..98C
(End) Patricia Vannier [CDS] 25-Jan-2016