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Start Over Rights http://creativecommons.org/publicdomain/mark/1.0/ Subject astronomy

2. A high resolution study of diffuse interstellar bands

Creator:
Westerlund, B. E. and Krelowski, J.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, interstellar bands, and Doppler splitting
Language:
Czech
Description:
High resolution (0.C5 A) spectra are used for the determlnatlon of the profiles of the diffuse Interstellar bands 5780 and 5797 orlginatlng in single clouds. It is shown that some of the clouds may contain agents of certain diffuse bands whereas others may not. The proflles of diffuse bands observed in dlstant stars contaln contributions from several clouds, differing In optical properties, which share the Doppler displacements observed in interstellar sodium lines. The Doppler splitting inside the diffuse bands´ profiles is, however, efficlently veiled because of the large intrinslc widths of the bands under consideration.
Rights:
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3. A model of galactic evolution

Creator:
Ferrini
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy and galactic evolution
Language:
Czech
Description:
I review our series of works on the galactic evoluton putting emphasis on some fundaments of he models instead that on their detailed structure. I show, with some example how the mathematical formulation is produced from the physical input, how it can be modified as physics is enriched, and which kind of results can be provided.
Rights:
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4. Active extragalactic objects

Creator:
Fosbury, R. A. E.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy and active galactic nuclei (AGN)
Language:
Czech
Description:
I review some aspects of recent studies of active galactic nuclei (AGN) and their environments. My approach is from the hypothesis that a single AGN phenomenon includes the plethora of object classes whose acronyms pervade the literature. Particular attention is given to the mechanisms of interaction between the cetral engine and its environment, both with regard to the ways in which the observed radiation is produced on a range of spatial scales and to the ways in which the activity is related to outside influences.
Rights:
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5. Analysis of nonradial oscillations of rapidly rotating δ Scuti stars

Creator:
Walker, Gordon, Yang, Stephenson, McDowall, Gennen, and Fahlman, Gregory
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy, δ Scuti stars, and nonradial oscillations
Language:
Czech
Description:
We have reported elsewhere the discovery of apparently high-degree nonradial oscillations for the four rapidly rotating (-120 kms^-1) δ Scuti stars: 21 Mon, κ^2 Boo, ν UMa, and o Eri. Here we discuss some of the techniques which we have used to isolate and to analyse the time varying components (-1% continuum) of the line profiles. They are best seen after subtraction of an average, filtered spectrum. For the δ Scuti stars, periodograms of the residual spectra show several peaks, some of which can be identified with the degrees of oscillation found in our preliminary analysis. In the latter, values of |m| were estimated from the sub-feature accelerations and delay in transit of the features. While one mode tends to dominate it is clear that often more than one Is present. The sub-features are not always equally spaced and they can show phase changes and doubling. While nrp provides an adequate, general description of the phenomena, we are probably seeing only part of something more complex. The immediate challenge is to combine the results from many lines plus higher spectral resolution to improve the visibility of the time varying features by at least an order of magnitude.
Rights:
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6. Astronomický den v Akademii

Creator:
Marina Hužvárová
Format:
print
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, Akademie věd České republiky, astronomie, astronomy, 12, and 00
Language:
Czech
Description:
The Czech National Committee for Astronomy under the auspices of head manager ESO Catherine Cesarsky and AS CR President Václav Pačes organized on 8th of June 2007 the Astronomical Day of the European Southern Observatory (in Chile) for Czech industry. and Marina Hužvárová.
Rights:
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7. Astroplate 2016

Creator:
Petr Skala
Format:
print, bez média, and svazek
Type:
article, články, journal articles, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, astronomie, semináře, astronomy, seminars, 12, and 00
Language:
Czech
Description:
Již podruhé se v bubenečské vile Lanně sešli odborníci zabývající se historickými astronomickými deskami. První setkání se konalo před dvěma lety, kdy se diskutovaly problémy desek sužovaných degradací emulze vlivem dlouhého a často nešetrného skladování - letošní akce se zúčastnilo 44 odborníků z 20 zemí od Mexika až po Čínu. and Petr Skala.
Rights:
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8. AXRO 2015: Rentgenové satelity a jejich budoucnost

Creator:
Blažek, Martin
Format:
print, bez média, and svazek
Type:
article, články, journal articles, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, Astronomický ústav (Akademie věd ČR), astronomie, kosmický výzkum, astronomy, space research, workshops, 12, and 00
Language:
Czech
Description:
International Workshop on Astronomical X-Ray-Optics (AXRO) organized by the Institute of Astronomy of the CAS was focused on presentation and discussion of recent and future technologies for future X-ray astronomy missions. One session was aimed on astrophysical aspects of X-ray telescopes/satellites, in which some review talks were given from leading scientists in this field plus some presentations of relevant Czech scientists. The goal of the workshop was to present and to discuss recent and future technologies for X-ray astronomy missions. These missions require development of mostly inovative technologies, and discussed the possibilities, the results obtained so farm and new ideas in detail. It is obvious that the requirements of future large space X-ray optics based on Si wafers, advanced glass forming for precise X-ray optics, but also other possible technologies and alternatives, as well as related advanced metrology, measurements and tests. and Martin Blažek.
Rights:
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9. Calibrated IUE LWR low resolution spectra of G-type stars

Creator:
Malagnini, M. L., Morossi, C., Rossi, L., and Valente, T.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
astronomy and G-type stars
Language:
Czech
Description:
We present here an example of the main features of the Atlas of calibrated IUE LWR low resolution spectra of on-supergiant G-type stars whose preparation is now in progress. The source of references for the relevant astrophysical data is the Set of Identifications, Measurements and Bibliography for Astronomical Data (SIMBAD) available through the C. D. S. (Strasbourg, France).
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public