astronomy   42641

« earlier    

LIGO and distance
Gravity wave detection gives us a new way to measure cosmic distances
distance  astronomy  ligo 
14 hours ago by nelson
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 
yesterday 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.
yesterday 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 
yesterday 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: