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Astronomers snap first-ever image of supermassive black hole Sagittarius A*（图）
超大质量黑洞 人马座A* 银河系
2023/6/9
Black holes are invisible by nature. Their pull is inescapable, forever trapping any light that falls into their gravitational abyss. But just beyond a black hole’s point of no return, light persists,...
Zoom media briefing:The Event Horizon Telescope, a year after capturing the image of a black hole（图）
Zoom media briefing Event Horizon Telescope year after capturing the image black hole
2020/4/10
Media are invited to join an April 10 Zoom media briefing with Sheperd S. Doeleman, founding director of the Event Horizon Telescope (EHT), and astrophysicist Michael Johnson to discuss the one-year a...
New Caltech Instrument Poised to Image the Cosmic Web
New Caltech Instrument Poised Image Cosmic Web
2017/2/16
An instrument designed to image the vast web of gas that connects galaxies in the universe shipped early this morning, Jan. 12, from Los Angeles to Hawaii, where it will be integrated into the W. M. K...
A fast 2D image reconstruction algorithm from 1D data for the Gaia mission
methods data analysis
2011/8/24
A fast 2-dimensional image reconstruction method is presented, which takes as input 1-dimensional data acquired from scans across a central source in different orientations. The resultant reconstructe...
Adaptive image ray-tracing for astrophysical simulations
Adaptive image ray-tracing astrophysical simulations
2011/1/11
A technique is presented for producing synthetic images from numerical simulations whereby the image resolution is adapted around prominent features. In so doing, adaptive image ray-tracing (AIR) impr...
The image jets modeling of gravitationally lensed sources
jets gravitational lensing Hubble constant B0218+357
2010/11/11
The jets image modelling of gravitationally lensed sources have been performed. Several basic
models of the lens mass distribution were considered, in particular, a singular isothermal ellip-soid, an...
The final candidate from the JVAS/CLASS search for 6 arcsec to 15 arcsec image separation lensing
gravitational lensing strong - galaxies clusters general - dark matter
2010/11/9
A search for 6 arcsec to 15 arcsec image separation lensing in the Jodrell Bank–Very Large
Array Astrometric Survey (JVAS) and the Cosmic Lens All-Sky Survey (CLASS) by Phillips
et al. found thirtee...
Understanding micro-image configurations in quasar microlensing
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/22
The micro-arcsecond scale structure of the seemingly point-like images in lensed quasars, though unobservable, is nevertheless much studied theoretically, because it affects the observable (or macro) ...