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TYC 3709-595-1


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A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun
Traditionally, runaway stars are O- and B-type stars with large peculiarvelocities. We would like to extend this definition to young stars (upto ?50 Myr) of any spectral type and to identify those present in theHipparcos catalogue by applying different selection criteria, such aspeculiar space velocities or peculiar one-dimensional velocities.Runaway stars are important for studying the evolution of multiple starsystems or star clusters, as well as for identifying the origins ofneutron stars. We compile the distances, proper motions, spectral types,luminosity classes, V magnitudes and B-V colours, and we utilizeevolutionary models from different authors to obtain star ages. We studya sample of 7663 young Hipparcos stars within 3 kpc from the Sun. Theradial velocities are obtained from the literature. We investigate thedistributions of the peculiar spatial velocity and the peculiar radialvelocity as well as the peculiar tangential velocity and itsone-dimensional components and we obtain runaway star probabilities foreach star in the sample. In addition, we look for stars that aresituated outside any OB association or OB cluster and the Galactic planeas well as stars for which the velocity vector points away from themedian velocity vector of neighbouring stars or the surrounding local OBassociation/cluster (although the absolute velocity might be small). Wefind a total of 2547 runaway star candidates (with a contamination ofnormal Population I stars of 20 per cent at most). Thus, aftersubtracting these 20 per cent, the runaway frequency among young starsis about 27 per cent. We compile a catalogue of runaway stars, which isavailable via VizieR.

Micrometer observations of double stars and new pairs. XII
Measurements of 2132 pairs and 103 double stars, obtained in both theNorthern and Southern Hemispheres in the period June 1982 to September1984, are listed in a table. The observations were carried out using theSwarthmore College 61-cm refractor, and the 100 and 91 cm telescopes ofthe Cerro Tololo Inter-American Observatory. Corrections to the IDScatalog (1961 version) are given for some of the fainter stars in thesurvey.

A spectrophotometric survey of stars along the Milky Way. IV
In the present paper a catalogue of spectrophotometric quantities,spectral types, monochromatic magnitudes and colour equivalents is givenfor all stars brighter than the magnitude m4400 = 10.5 in aregion of the Milky Way in Perseus. No absorption is found for starscloser than about r = 100 pc. The absorbing clouds are situated atdistances closer than 1 kpc and at about 2.5 kpc in the local arm andthe Perseus arm, respectively. The space between the two arms is freefrom absorption. It is also concluded that the Perseus arm continuesbeyond l = 140 deg, containing not only hydrogen gas but also dust to atleast l = 150 deg), while the content of OB stars decreases abruptly atl = 140 deg.

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Observation and Astrometry data

Constellation:Perseus
Right ascension:03h00m41.95s
Declination:+56°59'42.8"
Apparent magnitude:9.392
Proper motion RA:9.3
Proper motion Dec:-2
B-T magnitude:9.87
V-T magnitude:9.432

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 3709-595-1
USNO-A2.0USNO-A2 1425-04053463
HIPHIP 14032

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