Δημοσιεύσεις

Δημοσιεύσεις2023-07-31T14:19:06+03:00

Πρόσφατες Δημοσιεύσεις

Discovery of an optical cocoon tail behind the runaway HD 185806

04/07/2022|

Studies on the circumstellar structures around evolved stars provide vital information on the evolution of the parent star and the properties of the local interstellar medium. In this work, we present the discovery and characterization of an optical cocoon tail behind the star HD 185806. The cocoon apex emission is puzzling, as it is detected in the infrared but shows no signal in the optical wavelength.

Deep optical study of the mixed-morphology supernova remnant G 132.7+1.3 (HB3)

17/02/2022|

We present optical ccd images of the large supernova remnant (SNR) G132.7 + 1.3 (HB3) covering its full extent for the first time, in the emission lines of H α+ [N II], [S II] and [O III], where new and known filamentary and diffuse structures are detected. These observations are supplemented by new low-resolution long-slit spectra and higher-resolution images in the same emission lines. Both the flux-calibrated images and spectra confirm that the optical emission originates from shock-heated gas since the [S II]/H α > 0.4.

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