Source:http://linkedlifedata.com/resource/pubmed/id/15269761
Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6998
|
| pubmed:dateCreated |
2004-7-22
|
| pubmed:abstractText |
Young, low-mass stars are luminous X-ray sources whose powerful X-ray flares may exert a profound influence over the process of planet formation. The origin of the X-ray emission is uncertain. Although many (or perhaps most) recently formed, low-mass stars emit X-rays as a consequence of solar-like coronal activity, it has also been suggested that X-ray emission may be a direct result of mass accretion onto the forming star. Here we report X-ray imaging spectroscopy observations which reveal a factor approximately 50 increase in the X-ray flux from a young star that is at present undergoing a spectacular optical/infrared outburst (this star illuminates McNeil's nebula). The outburst seems to be due to the sudden onset of a phase of rapid accretion. The coincidence of a surge in X-ray brightness with the optical/infrared eruption demonstrates that strongly enhanced high-energy emission from young stars can occur as a consequence of high accretion rates. We suggest that such accretion-enhanced X-ray emission from erupting young stars may be short-lived, because intense star-disk magnetospheric interactions are quenched rapidly by the subsequent flood of new material onto the star.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
|
| pubmed:month |
Jul
|
| pubmed:issn |
1476-4687
|
| pubmed:author | |
| pubmed:issnType |
Electronic
|
| pubmed:day |
22
|
| pubmed:volume |
430
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
429-31
|
| pubmed:year |
2004
|
| pubmed:articleTitle |
An X-ray outburst from the rapidly accreting young star that illuminates McNeil's nebula.
|
| pubmed:affiliation |
Rochester Institute of Technology, Rochester, New York 14623-5604, USA. jhk@cis.rit.edu
|
| pubmed:publicationType |
Journal Article
|