Oleg Yu. Malkov

Matching and Verification of Multiple Stellar Systems in the Identification List of Binaries

Binary and multiple stellar systems have been observed using various methods and tools. Catalogs of binaries of different observational types are independent and use inherent star identification systems. Catalog rows describing components of stellar systems refer to identifiers of surveys and catalogs of single stars. The problem of cross-identification of stellar objects contained in sky surveys and catalogs of binaries of different observational types requires not only combining lists of existing identifiers of binary stars, but rather matching components and of multiple systems and pairs of components by their astrometric and astrophysical parameters. Existing identifiers are verified for belonging to matched components, pairs and systems. After that, they may be matched to one another. The framework of multiple system cross-matching presented in the paper uses domain knowledge of binaries of different observational types to form sets of matching criteria. The Identification List of Binaries (ILB) has been created after accurate matching of systems, their components and pairs of all observational types. This work continues research of binary and multiple system identification methods.

New distances for a selected set of visual binaries with inconsistent dynamical masses

We have selected a set of 17 visual binaries that demonstrate great inconsistency between the systemic mass obtained through Kepler’s Third Law as compared to that calculated through standard mass-luminosity and mass-spectrum relationships. A careful inspection of orbital data and parallaxes showed that the current orbits of nine binaries (WDS 00155–1608, WDS 00174+0853, WDS 05017+2050, WDS 06410+0954, WDS 16212–2536, WDS 17336–3706, WDS 19217–1557, WDS 20312+1116, and WDS 21118+5959) do not need to be improved, instead we recommend different parallax (distance) value for them. On the other hand, we considered that eight orbits (WDS 02366+1227, WDS 02434–6643, WDS 03244–1539, WDS 08507+1800, WDS 09128–6055, WDS 11532–1540, WDS 17375+2419, and WDS 22408–0333) had to be improved. Due to various reasons mentioned in this paper, their distances should most likely be corrected unless better orbital solutions and/or more precise parallaxes are reported. To obtain consistent mass values, the use of the dynamical parallax is still recommended for 5 out of the 8 improved orbits. For WDS 02434–6643, WDS 09128–6055, and WDS 11532–1540, the improvement itself yields reasonable mass sums while maintaining πHip

DIVISION XII / COMMISSION 5 / WORKING GROUP DESIGNATIONS

\pi_{\mathrm{Hip}}

Binary Star Database (BDB): New Developments and Applications

within a 1–2σ

Time allocation scheme for the WSO-UV mission

1\mbox{--}2\sigma

DIVISION XII / COMMISSION 5 / WORKING GROUP FITS DATA FORMAT

margin. New distance estimates for 16 stars (mainly based on the obtained dynamical parallaxes) and individual comments for all objects are presented and discussed.

DIVISION XII / COMMISSON 5 / WORKING GROUP: FITS

At the 2003 Sydney IAU meeting, Marion Schmitz (Caltech, USA) took over the chair of the Commission 5 Working Group Designations, succeeding Helene Dickel. The Working Group Designations of IAU Commission 5 clarifies existing astronomical nomenclature and helps astronomers avoid potential problems when designating their sources. The most important function of WG Designations during the period 2003-2005 was overseeing the IAU REGISTRY FOR ACRONYMS (for newly discovered astronomical sources of radiation: see the website http://cdsweb.u-strasbg.fr/cgi-bin/DicForm >) which is sponsored by the WG and operated by the Centre de Donnees de Strasbourg (CDS). The Clearing House, a subgroup of the WG, screens the submissions for accuracy and conformity to the IAU Recommendations for Nomenclature ( http://cdsweb.u-strasbg.fr/iau-spec.html >). From its beginning in 1997 through August 2006, there have been 132 submissions and 111 acceptances. Attempts to register asterisms, common star names, and suspected variable stars were rejected. The past three years saw 61 acronyms submitted with 50 of them being accepted. (GIRL - yes; WOMEN - no).

M - L relations for rapid and slow rotators

Binary star DataBase (BDB) is the database of binary/multiple systems of various observational types. BDB contains data on physical and positional parameters of 260,000 components of 120,000 stellar systems of multiplicity 2 to more than 20, taken from a large variety of published catalogues and databases. We describe the new features in organization of the database, integration of new catalogues and implementation of new possibilities available to users. The development of the BDB index-catalogue, Identification List of Binaries (ILB), is discussed. This star catalogue provides cross-referencing between most popular catalogues of binary stars.

COMMISSION 5: DOCUMENTATION AND ASTRONOMICAL DATA

The World Space Observatory — Ultraviolet (WSO-UV) is an int er ational space observatory for observation in UV spectral range 100-350 nm, that is beyond t he reach of ground-based instruments but where most of astrophysical processes can be effici ently studied with unprecedented capability. The WSO-UV project is funded by national space a g ncies of Russia and Spain with participation of Germany, Ukraine and China. The WSO-UV con sists of a 1.7 m aperture telescope (under responsibility of Russia) with instrumentati on designed to carry out high resolution spectroscopy, long-slit low resolution spectroscopy and direct sky imaging. The WSO-UV Ground Segment is under development by Spain and Russia. The y will coordinate the Mission and Science Operations and provide the satellite tracking s tations for the project. The WSO-UV will work as a targeted scientific observatory. Th ree scientific programs will be carried out at the observatory. Core Program of scientific observations, which deserves lar ge mounts of observing time, will be defined by the WSO-UV Science Committee to allow the conduc tion of high impact or legacy scientific projects. Funding Bodies Program is the guarante ed ime granted to each one of the national bodies funding the WSO-UV project. Guest observer program for everyone, or Open Program, consists of astronomical observations obtained w ith the WSO-UV by astronomers who may or may not belong to the WSO-UV international consortium . It is open to excellent scientific projects from the world-wide community and occupies up to 40 % of total observational time. A brief summary of the algorithmic strategies analyzed for s cheduling optimization is also presented in the paper.

THE RUSSIAN VIRTUAL OBSERVATORY: INFORMATION HUB

The Working Group FITS (WG-FITS) is the international control authority for the Flexible Image Transport System (FITS) data format. The WG-FITS was formed in 1988 by a formal resolution of the IAU XX General Assembly in Baltimore (MD, USA), 1988, to maintain the existing FITS standards and to approve future extensions to FITS.