astronomy   42640

« earlier    

LIGO and distance
Gravity wave detection gives us a new way to measure cosmic distances
distance  astronomy  ligo 
yesterday by nelson
`MAGNETARS', SOFT GAMMA REPEATERS & VERY STRONG MAGNETIC FIELDS Robert C. Duncan, University of Texas at Austin
Soft gamma repeaters ("SGRs") are X-ray stars that emit bright, repeating flashes of soft (i.e. low-energy) gamma rays. The physical nature of these stars was a mystery for many years. In 1992, it was proposed that SGRs are magnetically-powered neutron stars, or magnetars. Subsequent observational studies lent support to this hypothesis. Astronomers now think that all emissions detected from SGRs and from a related class of stars known as anomalous X-ray pulsars ("AXPs") are powered by magnetic field decay. Here I will explain how these strange, physically-extreme stars form, and why they emit steadily pulsating X-rays with sporadic, bright outbursts. I will also tell the story of their discovery and of the theoretical efforts which helped to reveal their bizarre nature.
astronomy  science 
2 days ago by rmohns
First observations of merging neutron stars mark a new era in astronomy: Event linked to the detection of gravitational waves -- ScienceDaily
Their analysis indicates, for example, that the merger triggered a relativistic jet (material moving at near the speed of light) that generated the gamma-ray burst, while matter torn from the merger system and ejected at lower speeds drove the r-process and the kilonova emissions at ultraviolet, optical, and infrared wavelengths.
Astronomy 
2 days ago by zephyr777
Neutron-Star Collision Shakes Space-Time and Lights Up the Sky | Quanta Magazine
Astronomers have for the first time matched a gravitational-wave signal to a kilonova’s burst of light, observations that will “go down in the history of
astronomy  astrophysics 
2 days ago by geetarista

« earlier    

related tags

201710  agriculture  aliens  alma  amateur  analysis  apod  aquarium  architecture  art  articles  astrobiology  astronomerscancluckalltheywantbuttheyrenotthebossoflanguage  astrophography  astrophysics  audio  australia  baryons  beautiful  biology  blackhole  blue  cartography  cassini  church  citizen-science  comet  concerts  cosmology  cosmos  critical  darkmatter  darkmatterisbogus  deeplearning  design  diigo  discovery  distance  dogpiling  dot  eclipse  ecology  electron  elements  energy  environment  environmental-studies  equipment  events  fav_tweet  feedly  galaxy  gender  generalrelativity  geoengineering  geography  google  googlemaps  gravity  gravitywaves  health  history  howto  hpc  ifttt  images  jupiter  learning  ligo  london  make  maps  maths  matt-taylor  media  medicine  mlibrary  moon  museum  music  nasa  nature  neutronstars  news  nuclear  oceanography  outer-space  pale  photographer  photography  photos  physics  planetarium  planets  policy  politics  pope  portal  presentation  prize  prizes  race  racism  radio  read-later  religion  research  saturn  sci-fi  science  sciencefiction  sculpture  sex  sexism  shirt  shirtgate  shopping  simulation  software  solar  space  spacetime  spain  star_tracker  stars  state  tech  telescope  telescopes  television  total-solar-eclipse  travel  tuesdaythoughts  twitter  universe  valencia  videos  visualization  washingtonpost  wave  weather 

Copy this bookmark:



description:


tags: