J/other/JDSO/6.30 New Wide Common Proper Motion Binaries (Benavides+, 2010)
Astrophysical and Dynamical study of New Wide Common Proper Motion Binaries
Benavides R., Rica F., Reina E., Castellanos J., Naves R., Lahuerta L.,
Lahuerta S.
<J. Double Star Obs. 6, 30 (2010)>
=2010JDSO....6...30B 2010JDSO....6...30B
ADC_Keywords: Stars, double and multiple ; Magnitudes, absolute ;
MK spectral classification ; Reddening
Keywords: (Stars:) binaries: visual - Stars: kinematics and dynamics -
Astrometry
Abstract:
In this work we report the discovery of 150 new double stars of
which 142 are wide common proper motion stellar systems. In
addition to this, we report the study of 23 recently catalogued
wide common proper motion binaries discovered by other observers.
Spectral types, photometric distances, kinematics and ages were
determined from data obtained consulting the literature. Several
criteria were used to determine the nature of each double star.
Orbital periods and the semimajor axes were calculated.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 92 173 Binary Stars Studied in this work
table2.dat 113 346 Astrophysical data for the stellar components
notes.dat 175 40 Notes about the Binary Stars
--------------------------------------------------------------------------------
See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2012)
I/121 : Common proper motions stars in AGK3 (Halbwachs, 1986)
J/A+A/521/A4 : CPMDS catalogue (Gavras+, 2010)
J/MNRAS/355/585 : New Northern common proper-motion pairs (Greaves, 2004)
J/MNRAS/422/14 : Radial velocities of wide doubles (Halbwachs+, 2012)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Disc WDS Discoverer Code and Number
8- 12 A5 --- Comp Components when more than 2 (1)
14- 15 I2 h RAh Right Ascension J2000 (Ep=J2000, hours) (2)
16- 17 I2 min RAm Right Ascension J2000 (Ep=J2000, minutes)
18- 19 I2 s RAs Right Ascension J2000 (Ep=J2000, seconds)
20 A1 --- DE- Declination J2000 (Ep=J2000, sign)
21- 22 I2 deg DEd Declination J2000 (Ep=J2000, degrees) (2)
23- 24 I2 arcmin DEm Declination J2000 (Ep=J2000, minutes)
25- 26 I2 arcsec DEs Declination J2000 (Ep=J2000, seconds)
28- 31 F4.2 mag dmag Differential magnitude Δm
33- 37 F5.2 mag Vmag1 V magnitude of the primary component (3)
39- 43 F5.2 mag Vmag2 V magnitude of the secondary component (3)
45- 53 A9 --- SpT1 ? Spectral Type of the Primary
55- 63 A9 --- SpT2 ? Spectral Type of the Secondary
65- 69 F5.2 mag d(m-M) ? Differential distance modulus (4)
71- 75 I5 AU Ea ? Expected semimajor axis (5)
77- 83 I7 yr Period ? Orbital Period Estimate (6)
85- 90 A6 --- Type Nature of the double star (7)
92- 92 A1 --- Note [X] X indicates a note in notes.dat file
--------------------------------------------------------------------------------
Note (1): Components, when the object has more than two. The WDS scheme is
followed.
Note (2): RA and DEC correspond with the position of the primary component,
that is, the brighter component of the binary.
Note (3): The V magnitudes came from Tycho-2 (Cat. I/259) catalog but for
BVD 149 AB where came from Hipparcos catalog (Cat. I/239) (Tycho-2 lists a
erroneous Vmag). So V magnitudes greater than 11th could have a low quality
due to the larger errors in the weak end of the V magnitude.
Note (4): Calculated as (V-Mv) of the secondary star minus (V-Mv) of the
primary star.
Note (5): For wide binaries it is not possible calculate orbital parameters,
but the semimajor axis can be determined from the angular separation.
Fischer & Marcy (1992ApJ...396..178F 1992ApJ...396..178F) determined a statistical relation
between the angular separation and semimajor axe and they calculated the
expected semimajor axis using a Monte Carlo simulation of a visual binary
having all possible combination of orbital parameters. They obtained the
relation Ea=(1.26*rho)*dist, where rho is the angular distance (in arcsec)
and dist is the distance to us (in pc).
Note (6): We estimate the orbital periods assuming circular (eccentricity = 0)
and face-on orbits (inclination = 0). We use the Kepler's third law from the
expected semimajor axis and masses of the stellar components.
Note (7): The nature of the double star is coded as follows:
PHY = Physical
OPT = Optical
CO = Common Origin
CPM = Common Proper Motion
? = unknown
-- = nature not studied
A "?" character at the end, means that the nature listed is the most
probable, but the double star could be of a different type. Often a
combination the two types are indicated separate by a "/" or "="
character. When a double star has approximately the same possibility
to be, for example PHY and CO, then is indicated as "PHY=CO". Other
example: when a double star is surely PHY but we can not rule out the
CO nature, then is indicated as "PHY/CO".
For information about the criteria or test used to determine the
nature of a double star, read the paper.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Disc WDS Discoverer Code and Number
8- 12 A5 --- Comp Components when more than 2 (1)
14- 15 I2 h RAh Right Ascension J2000 (Ep=J2000, hours) (2)
16- 17 I2 min RAm Right Ascension J2000 (Ep=J2000, minutes)
18- 19 I2 s RAs Right Ascension J2000 (Ep=J2000, seconds)
20 A1 --- DE- Declination J2000 (Ep=J2000, sign)
21- 22 I2 deg DEd Declination J2000 (Ep=J2000, degrees) (2)
23- 24 I2 arcmin DEm Declination J2000 (Ep=J2000, minutes)
25- 26 I2 arcsec DEs Declination J2000 (Ep=J2000, seconds)
28- 38 A11 --- GSC GSC identifier
40- 44 F5.2 mag Vmag V magnitude of the star (2)
46- 49 F4.2 mag B-V B-V color index for the star (3)
51- 56 F6.1 mas/yr pmRA Proper motion along RA (3)
58- 63 F6.1 mas/yr pmDE Proper motion along DE (3)
65- 69 F5.2 mag Kmag K magnitude from the 2MASS catalog
71- 74 F4.2 mag J-K J-K color index from the 2MASS catalog
76- 80 F5.2 mag V-K V-K color index
82- 90 A9 --- SpType ? MK spectral type
92- 96 F5.2 mag VMAG ? Absolute V magnitude in V filter
98-102 F5.1 pc Dist ? Photometric distance
104-108 F5.1 km/s Vtan ? Tangential velocity
110-113 F4.2 solMass Mass ? Stellar Mass
--------------------------------------------------------------------------------
Note (1): Components, when the object has more than two. The WDS scheme is
followed.
Note (2): The V magnitudes came from Tycho-2 (Cat. I/259) catalog but for
BVD 149 AB where came from Hipparcos catalog (Cat. I/239) (Tycho-2 lists a
erroneous Vmag). So V magnitudes greater than 11th could have a low quality
due to the larger errors in the weak end of the V magnitude.
Note (3): This data came from Tycho-2 catalog (Cat. I/259).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: notes.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- Disc WDS Discoverer Code and Number
8- 12 A5 --- Comp Components when more than 2 (1)
13-175 A163 --- Note Note description
--------------------------------------------------------------------------------
Note (1): Components, when the object has more than two. The WDS scheme is
followed.
--------------------------------------------------------------------------------
Acknowledgements:
Francisco Rica, frica0(at)gmail.com
(End) Francisco Rica [LIADA] 08-May-2012