In symbiotic stars, two different physical regimes of circumstellar material exist side by side. Around the donor red giant star, there is a cool and dense...
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CharlaDistribution of the Wind from the Cool Giants in Symbiotic Binary Stars
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PublicaciónDust around R Coronae Borealis Stars. I. Spitzer/Infrared Spectrograph Observations
Spitzer/infrared spectrograph (IRS) spectra from 5 to 37 μm for a complete sample of 31 R Coronae Borealis stars (RCBs) are presented. These spectra are...
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PublicaciónDust Around R Coronae Borealis Stars. II. Infrared Emission Features in an H-poor Environment
Residual Spitzer/Infrared Spectrograph spectra for a sample of 31 R Coronae Borealis (RCB) stars are presented and discussed in terms of narrow emission...
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PublicaciónDust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy
We present the results of a systematic analysis of the solid state features identified in the circumstellar environments of a large sample of evolved stars with...
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PublicaciónDynamics of the circumstellar gas in the Herbig Ae stars BF Orionis, SV Cephei, WW Vulpeculae and XY Persei
We present high resolution (λ/Δ λ = 49 000) échelle spectra of the intermediate mass, pre-main sequence stars BF Ori, SV Cep, WW Wul and XY Per. The spectra...
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PublicaciónEpisodic dust formation by HD 192641 (WR 137) - II
We present new infrared photometry of the WC7-type Wolf-Rayet star HD 192641 (WR137) from 1985 to 1999. These data track the cooling of the dust cloud formed in...
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PublicaciónEX Lupi in quiescence
Aims: EX Lupi is the prototype of EXors, a subclass of low-mass pre-main sequence stars whose episodic eruptions are attributed to temporarily increased...
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PublicaciónExploring the circumstellar environment of the young eruptive star V2492 Cygni
Context. V2492 Cyg is a young eruptive star that went into outburst in 2010. The near-infrared color changes observed since the outburst peak suggest that the...
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PublicaciónEXPORT: Optical photometry and polarimetry of Vega-type and pre-main sequence stars
This paper presents optical UBVRI broadband photo-polarimetry of the EXPORT sample obtained at the 2.5 m Nordic Optical Telescope. The database consists of...