We present the mid-infrared (mid-IR) period–luminosity relations (PLRs) using over 1000 Mira variables in Large Magellanic Cloud, for four Wide-field Infrared Survey Explorer and Spitzer bands. These PLRs cover a mid-IR wavelength range from 3.4–22 ?m are presented separately oxygen-rich (O-rich) carbon-rich (C-rich) Miras. can be used to measure distances individual O-rich and/or C-rich stars ...

The long secondary period (LSP) phenomenon, which is commonly observed in pulsating red giants, has not been detected any Mira yet. goal of this paper to verify, if there a physical reason for or it simply an observational bias. OGLE-III Sample Long Period Variables the Large Magellanic Cloud, containing 1663 Miras, used perform search periodicity these objects and identify candidates stars bas...

We present a new catalog of 11,209 O-rich AGB stars and 7172 C-rich in our Galaxy identifying more the bulge component considering visual carbon stars. For each object, we cross-identify IRAS, AKARI, MSX, WISE, 2MASS, AAVSO counterparts. two parts: one is based on IRAS PSC for brighter or isolated objects; other ALLWISE source less bright objects crowded regions. various infrared two-color diag...

Recent maser surveys have shown that many potential OH/IR stars have no OH masers in their circumstellar envelopes, despite the modest requirements which should be implicitly met by IRAS colour-selected candidates. It has been suggested that these OH/IR colour mimics must have a degenerate companion which dissociates OH molecules and disrupts the masing action, ie. that they are related to symb...

The 222 000 I-band light curves of variable stars detected by the OGLE-II survey in the direction of the Galactic Bulge have been fitted and have also been correlated with the DENIS and 2MASS all-sky release databases and with lists of known objects. Lightcurves, and the results of the lightcurve fitting (periods and amplitudes) and DENIS and 2MASS data are presented for 2691 objects with I-ban...

The defence responses of potato against Phytophthora infestans were studied using the highly resistant Sarpo Mira cultivar. The effects of plant integrity, meristems, and roots on the hypersensitive response (HR), plant resistance, and the regulation of PR genes were analysed. Sarpo Mira shoots and roots grafted with the susceptible Bintje cultivar as well as non-grafted different parts of Sarp...