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Resource Description:
For a list of all services and tables belonging to this table's resource, see Information on resource 'Delta-mu Binaries'
This table has an associated publication. If you use data from it, it may be appropriate to reference 1999A&A...346..675W (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.
To cite the table as such, we suggest the following BibTeX entry:
@MISC{vo:dmubin_main, year=2009, title={Delta-mu Binaries}, author={Wielen, R. and Dettbarn, C. and Jahrreiß, H. and Lenhardt, H. and Schwan, H.}, url={https://dc.zah.uni-heidelberg.de/tableinfo/dmubin.main}, howpublished={{VO} resource provided by the {GAVO} Data Center} }
A Δμ binary is an object that has a statistcally signifcant difference between instantaneous proper motion (as measured by HIPPARCOS) and a longer-term proper motion as indicated by longer-term observations.
The HIPPARCOS proper motion is taken from the HIPPARCOS catalogue.
The mean proper motion is usually either taken directly from a ground-based astrometric catalogue (after having applied appropriate systematic corrections), or a new mean proper motion (μ0) is calculated from the ground-based position(s) and the HIPPARCOS position. The following catalogues have been used for obtaining mean proper motions:
The basic principles of the method are explained in the paper: Wielen, R., Dettbarn, C., Jahreiß, H., Lenhardt, H., Schwan, H.: Indications on the binary nature of individual stars derived from a comparison of their HIPPARCOS proper motions with ground-based data (see source metadatum).
The stars listed here are those investigated (ca. 90000) with one (or more) F-measures exceeding 3.44.
We list many newly detected binaries, but also ones already known from other data, e.g. visual ones. In many cases of already known binaries, the F values should be considered as qualitative 'flags' for binarity only, since the proper motions compared may not refer to the same 'reference point' (e.g., HIPPARCOS refers to component A, while the FK5 to the center-of-mass).
Sorted by DB column index. [Sort alphabetically]
Name | Table Head | Description | Unit | UCD |
---|---|---|---|---|
hipno | HIP# | Catalog number in Hipparcos catalog | N/A | meta.id;meta.main |
raj2000 | RA(2000) | Right ascension from Hipparcos | deg | pos.eq.ra;meta.main |
dej2000 | Dec(2000) | Declination from Hipparcos | deg | pos.eq.dec;meta.main |
comp | Component | Component for resolved binaries | N/A | meta.code |
mv | m_V | Visual magnitude | mag | phot.mag;em.opt.V |
color | B-V | Color index B-V, Hipparcos V magnitude | mag | phot.color;em.opt.B;em.opt.V |
parallax | Parallax | Parallax from Hipparcos | mas | pos.parallax.trig |
ffh | F_FH | F-Measure for proper motions FK5 vs. Hipparcos [Note F] | N/A | stat.fit.goodness;pos.pm;arith.diff |
f0f | F_0F | F-measure for proper motions from FK5 vs. mu0F [Note F] | N/A | stat.fit.goodness;pos.pm;arith.diff |
f0h | F_0H | F-measure for proper motions from Hipparcos vs. mu0F [Note F] | N/A | stat.fit.goodness;pos.pm;arith.diff |
f0gch | F_0GCH | F-measure for proper motions from Hipparcos vs. mu0G [Note F] | N/A | stat.fit.goodness;pos.pm;arith.diff |
ft2h | F_T2H | F-measure for proper motions from Hipparcos vs. Tycho-2 [Note F] | N/A | stat.fit.goodness;pos.pm;arith.diff |
fmax | F_max | Maximum of F-measures reported [Note F] | N/A | stat.fit.goodness;pos.pm;arith.diff |
FK | FK | FK Part the star was found in | N/A | meta.ref |
GC | GC | Star Identifier in the GC | N/A | meta.id.cross |
T2 | T2 | Object is in Tycho-2 | N/A | meta.code |
HD | HD | Star Identifier in the HD-Catalogue | N/A | meta.id.cross |
HR | HR | Star Identifier in the HR-Catalogue | N/A | meta.id.cross |
CNS4 | CNS4 | Star Identifier in CNS4 | N/A | meta.id.cross |
FKno | FK | Star Identifier in the FK | N/A | meta.id.cross |
star_name | Name | Name of the star | N/A | meta.id |
CCDM | CCDM | Star Identifier in the CCDM-Catalogue | N/A | meta.id.cross |
Columns that are parts of indices are marked like this.
VO nerds may sometimes need VOResource XML for this table.
For the expressions used to obtain the F-measures, see 1999A&A...346..675W ("Source" in the metadata).
mu0F is a proper motion derived from the FK5 and Hipparcos positions, mu0G is a proper motion derived from the GC and Hipparcos positions.