... HS2253+8023 is a helium-rich white dwarf with traces of metals and hydrogen, which was recently discovered in the Hamburg Quasar Survey. We have derived temperatures and element abundances from optical and UV spectra by comparison with synthetic line profiles. In addition UV (HST, IUE) and optical spectra of the well-known white dwarf GD 40 with very similar atmospheric parameters were analysed and element abundances determined. ...

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• Armagh Observatory
• Atomic data for Stellar Atmospheres: lte_lines
• Armagh Observatory Preprint No. 306

... Programme . ... Abstract: Planetary nebulae constitute a unique source of light element abundances for individual stars in a distant stellar population. Multi-slit spectra of 50 planetary nebulae (PN) in NGC 5128 have been observed with the ESO VLT and FORS1 spectrometer. The planetary nebulae were observed in three fields covering a range of galactic radii from 2 to 19 kpc. The emission line spectra have been analysed for light element abundances (He, O, N, Ne, S, Ar). ...

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... Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Thesis Topic: Constraining Stellar Interiors and Mixing via Depletion Sequences of Light Elements . ... Observing with ESO Telescopes . ... ESO-MIDAS . ... ESO Data . ... ESO HST Image Galleries . ... ESO Data Access Policy . ... ESO Science Newsletter . ... Lithium (Li), beryllium (Be) and boron (B), usually referred to as "the light elements", represent a powerful diagnostic for studying stellar interiors and stellar mixing. ...

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• ESO - Thesis Topic: Planetary Nebulae and HII regions in the Elliptical Galaxy
• ESO - Thesis Topic: Testing the non-universality of the low-mass end of the
• ESO - Thesis Topic: How much can a supermassive black hole consume?

Next: Boron in the Up: The Interstellar Medium Previous: GHRS Observations of . ... The Goddard High Resolution Spectrograph (GHRS) of the Hubble Space Telescope (HST) has been used to obtain a spectrum of the boron 2500? region of BD-13^o 3442. ... We used the line list of Duncan et al. (1996a), which consists almost entirely of laboratory-measured lines, and which fits both the Hyades giants and metal-poor stars. ... It is clear that BD-13^o 3442 is the most metal-poor star of the three. ...

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• Boron in the Galactic Halo and Disk
• GOODS: The Great Observatories Origins Deep Survey
• JWST Design

... Current APO Weather . ... Search Site . ... Information for New Users . ... Technical Staff pages . Night Logs and Mailing Lists (maintained by APO) . ... Technical Documents and Database Search . ... Observer's Documentation and Procedures . ... Problem Reporting and APO Technical Documents Database Search . ... APO Drawing/Document Management Procedures . ... APO Technical Documents Database Search . Home Astrophysical Research Consortium . ... Mail Lists (maintained by APO) . ...

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• Primary mirror support

... Connecting the planned observations and the actual status of the Chandra X-ray Observatory is the observation interval determination pipeline ( OBIDET ). This collection of tools allows the Chandra X-Ray Center Data System automated processing to process the data through the necessary pipelines based on what was actually observed. ... In the case of the Chandra X-ray Observatory, the observation interval determination pipeline ( OBIDET ) is used for this task. ...

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• The PROS Big Picture: A High-Level Representation of a Software System
• ADASS 2002 Conference Proceedings
• ADASS 2003 Conference Proceedings

... A correlation between metal abundance and orbital elements (the eccentricity and angular momentum) has been found for three semples of disk stars of our Galaxy with abundance derived from detailed analysis. The correlation indicates that metal abundance in the Galaxy kept increasing after the birth of old disk stars and that the Galaxy kept collapsing during the formation of its disk subsystems. ...

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... A method to detect non-radial pulsations of CP stars is suggested. ... The opportunity is noted to get an information on spatial structure of non-radial oscillations from the analysis of radial velocities of chemical element lines, concentrated in the spots. To detect and identify the modes of non-radial oscillations of average grades it is suggested to use the methods of line profile analysis applying thee to the lines observed in the local spots on the stellar surface. ...

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• http://mavr.sao.ru/hq/lizm/conferences/pdf/1987/1987_p62-p63.pdf
• http://mavr.sao.ru/hq/lizm/conferences/pdf/1987/1987_p76-p76.pdf
• The peculiar post-AGB supergiant IRAS04296+3429: optical spectroscopy and its

. " The Arecibo Observatory is sponsored by the National Science Foundation. Any opinions, findings and conclusions or recommendations . expressed in this publication are those of the author(s) and do not necessarily reflect the views of the National Science Foundation."

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• Astronomy at Arecibo Observatory

. Pulkovo Observatory of Russian Academy of Sciences is situated . near Saint-Petersburg. It was founded in 1839. 196140, Saint-Petersburg, Pulkovskoye chaussee 65/1 . English version . Russian version . This page has been accessed times since May 1, 1999.

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• Pulkovo NEO Page: Ephemeris Support
• Pulkovo VLBI Analysis Center

... Дни открытых дверей к юбилею САО РАН (12-14 апреля 2016 г.) . Международная конференция "Dark Ages and White Nights (Spectroscopy of the CMB)" (20-24 июня 2016 г.) . ... Международная конференция MULTI-SPIN GALAXIES - 2016 (26-30 сентября 2016 г.) . Международная астрономическая конференция "Физика звезд: от коллапса до коллапса" (3-7 октября 2016 г.) Архив . ... Подробнее.. ... 10.02.16 . ... БТА в реальном времени . ... Цейсс-1000 в реальном времени . ... Последнее обновление: 22/03/2016 ...

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13. DIGITAL WDC EXCHANGE FORMAT FOR OBSERVATORY 1.0 MINUTE VALUES