Fourteen candidate RR Lyrae star streams in the inner Galaxy

We apply the GC3 stream-finding method to RR Lyrae stars (RRLS) in the Catalina survey. We find two RRLS stream candidates at $>4\sigma$ confidence and another 12 at $>3.5\sigma$ confidence over the Galactocentric distance range $4 < D/{\rm kpc} < 26$. Of these, only two are associated with known globular clusters (NGC 1261 and Arp2). The remainder are candidate `orphan' streams, consistent with the idea that globular cluster streams are most visible close to dissolution. Our detections are likely a lower bound on the total number of dissolving globulars in the inner galaxy, since many globulars have few RRLS while only the brightest streams are visible over the Galactic RRLS background, particularly given the current lack of kinematical information. We make all of our candidate streams publicly available and provide a new GALSTREAMS Python library for the footprints of all known streams and overdensities in the Milky Way.Comment: 18 pages, 4 figures. Accepted for publication at MNRAS. GALSTREAMS Milky Way Streams Footprint Library are available at https://github.com/cmateu/galstreams . All RRL data and code used in the paper are available at https://cmateu.github.io/Cecilia_Mateu_WebPage/CatalinaGC3_Streams.htm

Estudio palinológico de las especies europeas del género Launeae Cass. (Compositae, Lactuceae)

Se estudian los carac.:teres palinológicos cualita ivos y cuantitativos , a M.O. y M.E. B., así como la estructura de la exina a M. E.B., de las seis especies europeas del género Launaea Cass . : L. a rbo r escens , L. cer vicor nis , L . fragi lis , L. lani f er a , L. nudicaulis y L. pumi la. Todas ellas presentan un tipo polínico común tricolpor orado, equi nolof'ado, con dos zonas polares y quince lagunas , subobl ato , y exina no caveadaQuali tati ve and quantitative palynol ogical characters were studied by L.M. and S. E.M., and exine structure by S . E. r~ . , in t he six european species of Launaea Cass . : L. ar bores cens , L. cervicornis , L. f ragilis , L . l anifer a , L. nudicaulis and L. pumila . A s i ngl e pollen type is common to all the species : tricolpor orate , echinol ophate , wi th fifteen l acunae a nd bolo polar are as , suboblate , wi th caveae absent

El doctor Sardà i Salvany i la Renaixença

El doctor Sardà i Salvany i la Renaixenç