Pre main sequence stars as UV sources for the World Space Observatory-UV mission

Castro, Ana Inés Gómez de; Ламзин, С. А.

doi:10.1007/s10509-011-0649-2

Cited by 2 publications

(1 citation statement)

References 52 publications

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“…The UV line fluxes contain information about all the physical components of the star-its photosphere, magnetosphere, outflows (winds analogous to the solar wind), jets, accretion flows, inner disk, and remnants of gas in the young planetary system. Only analyses of highresolution spectra at various phases of the source variability can enable separation of the contributions of the individual components [180].…”

Section: Accretion and Activitymentioning

confidence: 99%

Scientific problems addressed by the Spektr-UV space project (world space Observatory—Ultraviolet)

et al. 2016

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Abstract-The article presents a review of scientific problems and methods of ultraviolet astronomy, focusing on perspective scientific problems (directions) whose solution requires UV space observatories. These include reionization and the history of star formation in the Universe, searches for dark baryonic matter, physical and chemical processes in the interstellar medium and protoplanetary disks, the physics of accretion and outflows in astrophysical objects, from Active Galactic Nuclei to close binary stars, stellar activity (for both low-mass and high-mass stars), and processes occurring in the atmospheres of both planets in the solar system and exoplanets. Technological progress in UV astronomy achieved in recent years is also considered. The well advanced, international, Russian-led Spektr-UV (World Space Observatory-Ultraviolet) project is described in more detail. This project is directed at creating a major space observatory operational in the ultraviolet (115-310 nm). This observatory will provide an effective, and possibly the only, powerful means of observing in this spectral range over the next ten years, and will be an powerful tool for resolving many topical scientific problems.

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Section: Accretion and Activitymentioning

confidence: 99%

Scientific problems addressed by the Spektr-UV space project (world space Observatory—Ultraviolet)

et al. 2016

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Effect of the UV dose on the formation of complex organic molecules in astrophysical ices: irradiation of methanol ices at 20 K and 80 K

Tenelanda-Osorio

Bouquet

Javelle

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Methanol is an ubiquitous complex organic molecule (COM) in the interstellar medium, thought to be a precursor of larger COMs when it is submitted to different energetic processes, that can trigger chemical reactions in solid and gas phases. Using laboratory experiments, we report the characterization of the evolution of photo-products generated by the UV irradiation of methanol ice at different UV doses and temperatures (20 and 80 K). We used gas chromatography coupled to mass spectrometry (GC-MS) to analyze the volatile organic compounds (VOCs) recovered during the warming of the photo-processed methanol ice. We identified 21 molecules (with up to 5 carbon atoms, including alcohols, aldehydes, ketones, ester and ethers) and followed their abundance as a function of the UV fluence and ice temperatures. With increasing UV fluence, an increase in the production of heavier COMs is observed, while species with 1 or 2 carbon atoms are depleted or do not increase. Species within a same chemical family show the same pattern of evolution, with heavier molecules present in smaller quantities. Ketones and esters are the chemical families that lead to more complex molecules and start forming at the earliest stages of irradiation. Their formation pathways are driven by radical recombinations with CO as the main building blocks. Aldehydes are formed before their alcohol counterparts, implying they do not form through alcohol deshydrogenation, but via radical recombination around HCO. Ethers seem to be the precursors of a large set of COMs, and alcohols present a steady profile throughout irradiation.

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Pre main sequence stars as UV sources for the World Space Observatory-UV mission

Cited by 2 publications

References 52 publications

Scientific problems addressed by the Spektr-UV space project (world space Observatory—Ultraviolet)

Scientific problems addressed by the Spektr-UV space project (world space Observatory—Ultraviolet)

Effect of the UV dose on the formation of complex organic molecules in astrophysical ices: irradiation of methanol ices at 20 K and 80 K

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