User talk:Tiakortman/sandbox: Difference between revisions
Content deleted Content added
Tiakortman (talk | contribs) ←Created page with 'Discoveries of Helium stars- "GALEX J184559.8−413827 (or J1845−4138 for short), was initially classified as a faint helium-rich "hot subdwarf," but new spect...' |
Tiakortman (talk | contribs) ←Blanked the page Tag: Blanking |
||
| Line 1: | Line 1: | ||
Discoveries of Helium stars- "GALEX J184559.8−413827 (or J1845−4138 for short), was initially classified as a faint helium-rich "hot subdwarf," but new spectroscopic observations reveal that this star is more hydrogen-deficient than previously thought."[1] This was in 2011 and was labeled a "hot subdwarf." This means that GALEX J184559.8-413827 is characterized with being hotter and larger than the sun, while also being completely devoid of hydrogen. From these classifications, this hot subdwarf is considered to be a extreme helium star. In South Africa, the Southern Africa Large Telescope (SALT) has been monitoring this massive helium star's high-resolution spectrum. |
|||
A Hypervelocity star (HVSs) called US 708, HVS 2 has been labeled a helium star. Being the most fast rotator, it is thought to be a remnant of a thermonuclear supernova.[2] |
|||
Origin of Helium stars After a binary mass transfer, a helium star is formed.[3] |
|||
Turning into a supernova The star will begin to grow in radius and evolve upon exploding into a supernova.[4] |
|||
Merging with a helium star |
|||
Often when a supernova dies, long gamma ray bursts are emitted. In 2010 it was observed that the aftermath of a supernova death caused a helium star to merge with a neuron star. This led to the merger going through a common envelope phase (losing it's hydrogen) and emitting gamma ray bursts. [5] |
|||
Jump up |
|||
^ https://phys.org/news/2017-06-rare-extreme-helium-star-astronomers.html. Missing or empty |title= (help) |
|||
Jump up |
|||
^ http://science.sciencemag.org.ezproxy.pvc.maricopa.edu/content/347/6226/1126. Missing or empty |title= (help) |
|||
Jump up |
|||
^ http://ic.galegroup.com.ezproxy.pvc.maricopa.edu/ic/scic/AcademicJournalsDetailsPage/AcademicJournalsDetailsWindow?disableHighlighting=&displayGroupName=Journals&docIndex=&source=&prodId=&mode=view&limiter=&display-query=&contentModules=&action=e&sortBy=&windowstate=normal&currPage=&dviSelectedPage=&scanId=&query=&search_within_results=&p=SCIC&catId=&u=mcc_pv&displayGroups=&documentId=GALE%7CA377862230&activityType=BasicSearch&failOverType=&commentary=. Missing or empty |title= (help) |
|||
Jump up |
|||
^ http://ic.galegroup.com.ezproxy.pvc.maricopa.edu/ic/scic/AcademicJournalsDetailsPage/AcademicJournalsDetailsWindow?disableHighlighting=&displayGroupName=Journals&docIndex=&source=&prodId=&mode=view&limiter=&display-query=&contentModules=&action=e&sortBy=&windowstate=normal&currPage=&dviSelectedPage=&scanId=&query=&search_within_results=&p=SCIC&catId=&u=mcc_pv&displayGroups=&documentId=GALE%7CA377862230&activityType=BasicSearch&failOverType=&commentary=. Missing or empty |title= (help) |
|||
Jump up |
|||
^ http://ky5ry5jk2j.search.serialssolutions.com/?ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fsummon.serialssolutions.com&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+unusual+%CE%B3-ray+burst+GRB+101225A+from+a+helium+star%2Fneutron+star+merger+at+redshift+0.33&rft.jtitle=Nature&rft.au=Th%C3%B6ne%2C+C.+C&rft.au=de+Ugarte+Postigo%2C+A&rft.au=Fryer%2C+C.+L&rft.au=Page%2C+K.+L&rft.date=2011-11-30&rft.issn=0028-0836&rft.eissn=1476-4687&rft.volume=480&rft.issue=7375&rft.spage=72&rft.epage=74&rft_id=info:doi/10.1038%2Fnature10611&rft.externalDBID=n%2Fa&rft.externalDocID=10_1038_nature10611¶mdict=en-US. Missing or empty |title= (help) |
|||