Poчetna     Да почнемо     To Survive in the Universe    
Inhabited Sky
    News@Sky     Астро Фотографије     Колекција     Форум     Blog New!     FAQ(Често постављана питања     Штампа     Улогуј се  

HD 83945


Садржај

Слике

Уплоадјуј своје слике

DSS Images   Other Images


Везани чланци

Five-colour photometry of early-type stars in the direction of galactic X-ray sources
The results of five-color (Walraven system) photometry of 551 O- andB-type stars located in 17 fields of a few square degrees aroundgalactic X-ray sources are presented. From a comparison ofreddening-free combinations of color indices with theoretical values,calculated for model atmospheres of Kurucz (1979), effective temperatureand surface gravity for these stars are derived. In addition theirabsolute magnitude are determined by combining these parameters with theresults of evolutionary calculations of massive stars. These effectivetemperatures are in good agreement with the temperature scale ofBohm-Vitense (1981) for stars of luminosity classes II to V. For thesupergiants the effective temperatures are about 40 percent higher. Forstars of luminosity classes III to V the absolute magnitudes agree wellwith the results of independent luminosity calibrations of spectraltypes, but for brighter stars they deviate systematically. Thephotometric data are also used to study the interstellar reddening inthe direction of the X-ray sources.

The classification of intrinsic variables.5 The large-amplitude red variables.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1975ApJ...195..661E&db_key=AST

Додај нови чланак


Линкови у сродству са темом

  • - Нема линкова -
Додај нови линк


Чланови следећих група \:


Посматрања и Астрометриски подаци

Сазвежђа:Прамац
Ректацензија:09h39m10.06s
Deклинација:-62°33'16.0"
Apparent магнитуда:7.602
Даљина:305.81 parsecs
Proper motion RA:-18.3
Proper motion Dec:8.6
B-T magnitude:7.595
V-T magnitude:7.602

Каталог и designations:
Proper имена   (Edit)
HD 1989HD 83945
TYCHO-2 2000TYC 8945-863-1
USNO-A2.0USNO-A2 0225-06406061
HIPHIP 47379

→ Захтевај још каталога од VizieR