E-BOSS: An Extensive stellar BOw Shock Survey. II. Catalogue second release

C. S. PERI; P. BENAGLIA; N.ISEQUILLA

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Lugar: Paris; Año: 2015 p. 1 - 18

0004-6361

Context. Stellar bow shocks have been studied not only observationally but also theoretically since the late ?80s. Only a few catalogues of them exist. The bow shocks show emission along all the electromagnetic spectrum but they are detected more easily in infrared wavelengths. The release of new and high quality infrared data eases the discovery and subsequent study of new objects. Aims. We search stellar bow-shock candidates associated with nearby runaway stars, and gather them together with those found elsewhere, to enlarge the list of Peri et al. (2012), E-BOSS first release. We aim to characterize the bow-shock candidates and provide a database usable for statistic studies. We investigate the low frequency radio emission at the position of the bow-shock features, that can contribute to further studies of high energy emission from these objects. Methods. We considered samples from different literature sources and searched for bow-shaped structures associated with stars in the Wide-field Infrared Survey Explorer (WISE) images. We sought each bow-shock candidate on centimeter radio surveys. Results. We reunited 45 bow-shock candidates and generated composed WISE images to show the emission in different infrared bands. Among them there are new sources, already studied objects, and bow shocks found serendipitously. Five bow shocks show evidence of radio emission. Conclusions. Stellar bow shocks constitute an active field with open questions and enormous amount of data to be analyzed. Future research at all wavelengths databases, and use of instruments like Gaia, will provide a more complete picture of these objects. For instance, confection of infrared spectral energy distributions can give information about physical parameters of the bow shock matter. Also, dedicated high sensitivity radio observations can help to understand the radio-γ connection.