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A subdwarf O star (sdO) is a type of hot, but low-mass star. O-type subdwarfs are much dimmer than regular O-type main-sequence stars, but with a brightness about 10 to 100 times that of the Sun, and have a mass approximately half that of the Sun. Their temperature ranges from 40,000 to 100,000 K. Ionized helium is prominent in their spectra. Gravity acceleration is expressed by log g between 4.0 and 6.5. Many sdO stars are moving at high velocity through the Milky Way and are found at high galactic latitudes.

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rdf:type
rdfs:label
  • Subdwarf O star (en)
  • Étoile sous-naine de type O (fr)
  • Estrela subanã O (pt)
  • Субкарлик спектрального класса O (ru)
  • O型次矮星 (zh)
rdfs:comment
  • Une étoile sous-naine de type O (sdO - subdwarf O) est une étoile chaude, mais de faible masse. Les étoiles sous-naines de type O sont beaucoup moins lumineuses que les étoiles bleues de la séquence principale normales, mais leur luminosité est environ 10 à 100 fois supérieure à celle du Soleil et leur masse est environ deux fois moins importante que celle du Soleil. Leur température est comprise entre 40 000 et 100 000 K. L'hélium ionisé est bien visible sur leur spectre. L'accélération gravitationnelle, exprimée en log « g », est comprise entre 4,0 et 6,5. Beaucoup d'étoiles sdO se déplacent à grande vitesse à travers la Voie lactée et sont identifiées à des latitudes galactiques élevées. (fr)
  • A subdwarf O star (sdO) is a type of hot, but low-mass star. O-type subdwarfs are much dimmer than regular O-type main-sequence stars, but with a brightness about 10 to 100 times that of the Sun, and have a mass approximately half that of the Sun. Their temperature ranges from 40,000 to 100,000 K. Ionized helium is prominent in their spectra. Gravity acceleration is expressed by log g between 4.0 and 6.5. Many sdO stars are moving at high velocity through the Milky Way and are found at high galactic latitudes. (en)
  • Uma Estrela subanã O (sdO) é uma estrela quente, mas de baixa massa. Subanãs do tipo O são muito mais escuras do que estrelas regulares de classe O da sequência principal, mas com um brilho de cerca de 10 a 100 vezes ao do Sol, e tem uma massa de cerca de metade da do Sol. Suas faixas de temperatura variam de 40.000 a 100.000 K. Hélio ionizado é proeminente em seus espectros. A aceleração da gravidade é expressa por log g entre 4,0 e 6,5. Muitas estrelas sdO estão se movendo em alta velocidade através da Via Láctea e são encontradas em altas latitudes galácticas. (pt)
  • Субкарлик спектрального класса O (англ. subdwarf O star, sdO) — подкласс горячих маломассивных звёзд. Субкарлики спектрального класса O более слабые, чем обычные O-звёзды главной последовательности, но всё же их светимость превышает солнечную в 10-100 раз, а масса составляет около половины массы Солнца. Температура варьируется от 40 000 K до 100 000 K. В спектре заметен ионизованный гелий. lg g составляет от 4,0 до 6,5. Многие sdO-звёзды двигаются в Млечном Пути с высокими скоростями и обнаруживаются на высоких галактических широтах. (ru)
  • O型次矮星(Subdwarf O stars,縮寫:sdO)是一種低質量高溫恆星。這種恆星的光度遠低於典型的O型主序星,但仍有太陽的10到100倍,雖然質量只有大約太陽的一半。O型次矮星的表面溫度大約是40,000到100,000 K,在光譜中有明顯的離子氦譜線。它的表面重力加速度對數值(log g)大約是4.0到6.5。大多數的O型次矮星在銀河系中的移動速度相當高,並且多發現在高銀緯處。 (zh)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/A_Fleeting_Moment_in_Time_-_Planetary_Nebula_ESO_577-24.jpg
  • http://commons.wikimedia.org/wiki/Special:FilePath/Subdwarf_O_star_schematic_cross_section.png
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  • Une étoile sous-naine de type O (sdO - subdwarf O) est une étoile chaude, mais de faible masse. Les étoiles sous-naines de type O sont beaucoup moins lumineuses que les étoiles bleues de la séquence principale normales, mais leur luminosité est environ 10 à 100 fois supérieure à celle du Soleil et leur masse est environ deux fois moins importante que celle du Soleil. Leur température est comprise entre 40 000 et 100 000 K. L'hélium ionisé est bien visible sur leur spectre. L'accélération gravitationnelle, exprimée en log « g », est comprise entre 4,0 et 6,5. Beaucoup d'étoiles sdO se déplacent à grande vitesse à travers la Voie lactée et sont identifiées à des latitudes galactiques élevées. (fr)
  • A subdwarf O star (sdO) is a type of hot, but low-mass star. O-type subdwarfs are much dimmer than regular O-type main-sequence stars, but with a brightness about 10 to 100 times that of the Sun, and have a mass approximately half that of the Sun. Their temperature ranges from 40,000 to 100,000 K. Ionized helium is prominent in their spectra. Gravity acceleration is expressed by log g between 4.0 and 6.5. Many sdO stars are moving at high velocity through the Milky Way and are found at high galactic latitudes. (en)
  • Uma Estrela subanã O (sdO) é uma estrela quente, mas de baixa massa. Subanãs do tipo O são muito mais escuras do que estrelas regulares de classe O da sequência principal, mas com um brilho de cerca de 10 a 100 vezes ao do Sol, e tem uma massa de cerca de metade da do Sol. Suas faixas de temperatura variam de 40.000 a 100.000 K. Hélio ionizado é proeminente em seus espectros. A aceleração da gravidade é expressa por log g entre 4,0 e 6,5. Muitas estrelas sdO estão se movendo em alta velocidade através da Via Láctea e são encontradas em altas latitudes galácticas. (pt)
  • Субкарлик спектрального класса O (англ. subdwarf O star, sdO) — подкласс горячих маломассивных звёзд. Субкарлики спектрального класса O более слабые, чем обычные O-звёзды главной последовательности, но всё же их светимость превышает солнечную в 10-100 раз, а масса составляет около половины массы Солнца. Температура варьируется от 40 000 K до 100 000 K. В спектре заметен ионизованный гелий. lg g составляет от 4,0 до 6,5. Многие sdO-звёзды двигаются в Млечном Пути с высокими скоростями и обнаруживаются на высоких галактических широтах. (ru)
  • O型次矮星(Subdwarf O stars,縮寫:sdO)是一種低質量高溫恆星。這種恆星的光度遠低於典型的O型主序星,但仍有太陽的10到100倍,雖然質量只有大約太陽的一半。O型次矮星的表面溫度大約是40,000到100,000 K,在光譜中有明顯的離子氦譜線。它的表面重力加速度對數值(log g)大約是4.0到6.5。大多數的O型次矮星在銀河系中的移動速度相當高,並且多發現在高銀緯處。 (zh)
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