Low-Mass Pre-Main Sequence Stars and Their X-ray Emission
To investigate the formation and early evolution of stars, astronomers study the x-ray emission of T Tauri stars, which are young, solar-mass stars called pre-main sequence stars. Two Earth-orbiting x-ray satellites, the Röntgen X-ray Satellite (ROSAT) and the Advanced Satellite for Cosmology and As...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 1997-05, Vol.276 (5317), p.1363-1370 |
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| description | To investigate the formation and early evolution of stars, astronomers study the x-ray emission of T Tauri stars, which are young, solar-mass stars called pre-main sequence stars. Two Earth-orbiting x-ray satellites, the Röntgen X-ray Satellite (ROSAT) and the Advanced Satellite for Cosmology and Astrophysics (ASCA), have discovered x-ray emission from young protostars, called Class I objects. Many T Tauri stars were detected as x-ray sources by ROSAT. X-ray luminosity functions and correlations with other stellar parameters can be studied and used to investigate the x-ray emission mechanism. From the ROSAT data hundreds of T Tauri stars have been discovered, some of which are located outside regions of ongoing star formation. Stellar x-rays also irradiate circumstellar disks, regions where planets may form, so x-ray emission data from T Tauri stars may also be used to investigate the formation of planets. |
| doi_str_mv | 10.1126/science.276.5317.1363 |
| format | Article |
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Two Earth-orbiting x-ray satellites, the Röntgen X-ray Satellite (ROSAT) and the Advanced Satellite for Cosmology and Astrophysics (ASCA), have discovered x-ray emission from young protostars, called Class I objects. Many T Tauri stars were detected as x-ray sources by ROSAT. X-ray luminosity functions and correlations with other stellar parameters can be studied and used to investigate the x-ray emission mechanism. From the ROSAT data hundreds of T Tauri stars have been discovered, some of which are located outside regions of ongoing star formation. 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| identifier | ISSN: 0036-8075 |
| ispartof | Science (American Association for the Advancement of Science), 1997-05, Vol.276 (5317), p.1363-1370 |
| issn | 0036-8075 1095-9203 |
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| source | Science Magazine; Jstor Complete Legacy |
| subjects | Astronomical objects Astronomy Climate Cloud computing Energy Low mass stars Molecular clouds Motion Novas Observations Protostars Scientific Concepts Star formation Stars Stars & galaxies Stars, New Stellar Birth and Death Stellar classification Stellar spectra T Tauri stars X-ray astronomy X-rays |
| title | Low-Mass Pre-Main Sequence Stars and Their X-ray Emission |
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