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Mapping the Northern Galactic Disk Warp with Classical Cepheids
Soszyński, I.; Udalski, A.; Szymański, M. K. +11 more
We present an updated three dimensional map of the Milky Way based on a sample of 2431 classical Cepheid variable stars, supplemented with about 200 newly detected classical Cepheids from the OGLE survey. The new objects were discovered as a result of a dedicated observing campaign of the ≈280 square degree extension of the OGLE footprint of the G…
K2-295 b and K2-237 b: Two Transiting Hot Jupiters
Kuzuhara, M.; Alonso, R.; Deeg, H. +32 more
We report the discovery from K2 of two transiting hot Jupiter systems. K2-295 (observed in Campaign 8) is a K5 dwarf which hosts a planet slightly smaller than Jupiter, orbiting with a period of 4.0 d. We have made an independent discovery of K2-237 b (Campaign 11), which orbits an F9 dwarf every 2.2 d and has an inflated radius 60-70% larger than…
On the Relation between Interstellar Spectral Features and Reddening
Krełowski, J.; Bondar, A.; Galazutdinov, G. +1 more
It is well known that interstellar spectral features correlate with color excess E(B-V). This suggests that measuring intensities of these features allows one to estimate reddening of stars. The aim of this paper is to check how tight intensities of interstellar diffuse bands (DIBs) are related to the amount of extinction, measured using E(B-V). <…
Hen 3-160 - the First Symbiotic Binary with Mira Variable S Star
Gromadzki, M.; Mikołajewska, J.; Iłkiewicz, K. +3 more
Hen 3-160 is reported in Belczyński et al. catalog as a symbiotic binary system with M7 giant donor. Using V- and I-band photometry collected over 20 years we have found that the giant is a Mira variable pulsating with 242.5-day period. The period-luminosity relation locates Hen 3-160 at the distance of about 9.4 kpc, and its Galactic coordinates …
CoRoT-18 b: Analysis of High-Precision Transit Light Curves with Starspot Features
Heras, A. M.; Gondoin, P.; Schmidt, T. O. B. +4 more
When a planet occults a spotty area on a stellar surface, the flux increases and a characteristic feature in a light curve - a bump - is observed. Among the planets detected by the CoRoT-mission CoRoT-18 is especially interesting as it exhibited spot crossings that we have analyzed in detail. We used four ground-based observations obtained at a 1.…
Central Wavelengths and Profile Shapes of Diffuse Interstellar Bands versus Physical Parameters of Intervening Clouds
Krełowski, J.; Galazutdinov, G. A.; Marić, T. +2 more
We investigate whether there are variations of the central wavelengths or the profile shapes of diffuse interstellar bands and whether these variations are caused by different physical parameters of translucent clouds. For this purpose we used spectra of two stars seen through two different single clouds: HD 34078 (AE Aur) and HD 73882. The wavele…