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- Young_stellar_object abstract "Young stellar object (YSO) denotes a star in its early stage of evolution.This class consists of two groups of objects: protostars and pre–main sequence stars. Sometimes they are divided by mass – massive YSO (MYSO), intermediate mass YSO and brown dwarfs.YSO are usually classified using criteria based on the slope of their SED, introduced by Lada C.J. in 1987. He proposed three classes (I, II and III), based on the values of intervals of spectral index .Here is wavelength, and is flux density.The is calculated in the wavelength interval of 2.2–20 (near- and mid- infrared region).Later Greene et al. in 1994 added a fourth class of "flat spectrum" class sources. In 1993 Andre et al. discovered class 0—objects with strong submillimeter emission, but very faint at .Class 0 sources – undetectable at Class I sources have Flat spectrum sources have Class II sources have Class III sources have This classification schema roughly reflects evolutionary sequence. It is believed that most deeply embedded Class 0 sources evolve towards Class I stage dissipating their circumstellar envelopes. Eventually they become optically visible on the stellar birthline as pre–main sequence stars.YSO are also associated with early star evolution phenomena: jets and bipolar outflows, masers, Herbig–Haro objects, protoplanetary disks (circumstellar disks or proplyds).".
- Young_stellar_object wikiPageID "7205947".
- Young_stellar_object wikiPageRevisionID "605054651".
- Young_stellar_object hasPhotoCollection Young_stellar_object.
- Young_stellar_object subject Category:Star_formation.
- Young_stellar_object subject Category:Star_types.
- Young_stellar_object type CelestialBody.
- Young_stellar_object type Star.
- Young_stellar_object type PhysicalBody.
- Young_stellar_object comment "Young stellar object (YSO) denotes a star in its early stage of evolution.This class consists of two groups of objects: protostars and pre–main sequence stars. Sometimes they are divided by mass – massive YSO (MYSO), intermediate mass YSO and brown dwarfs.YSO are usually classified using criteria based on the slope of their SED, introduced by Lada C.J. in 1987.".
- Young_stellar_object label "Jong stellair object".
- Young_stellar_object label "Objeto estelar jovem".
- Young_stellar_object label "Objeto estelar joven".
- Young_stellar_object label "Oggetto stellare giovane".
- Young_stellar_object label "Young stellar object".
- Young_stellar_object label "初期恆星體".
- Young_stellar_object label "若い星状天体".
- Young_stellar_object sameAs Objeto_estelar_joven.
- Young_stellar_object sameAs Oggetto_stellare_giovane.
- Young_stellar_object sameAs 若い星状天体.
- Young_stellar_object sameAs 젊은_항성체.
- Young_stellar_object sameAs Jong_stellair_object.
- Young_stellar_object sameAs Objeto_estelar_jovem.
- Young_stellar_object sameAs m.025w26l.
- Young_stellar_object sameAs Q497654.
- Young_stellar_object sameAs Q497654.
- Young_stellar_object wasDerivedFrom Young_stellar_object?oldid=605054651.
- Young_stellar_object isPrimaryTopicOf Young_stellar_object.