MACS J1149 Lensed Star 1

Detection of MACS J1149 Lensed Star 1
A galactic cluster (left) magnifies a distant star (now called Icarus ) more than 2,000 times, making it visible from Earth in 2016 (bottom right), 9 billion light years away - although it was in 2016 was visible, the star was not visible in 2011 (top right).

MACS J1149 Lensed Star 1 is a blue supergiant . The star has a redshift of z = 1.49, which corresponds approximately to a distance of 9 billion light years . The supergiant is only visible thanks to an extreme gravitational lensing effect of the MACS J1149 galaxy cluster in combination with another compact object with about three solar masses . These objects, which are in front of the star, amplify its light about 2000 times.

MACS J1149 Lensed Star 1 was discovered by chance on April 29, 2016 on an infrared image taken by the Hubble Space Telescope . The actual goal was to research the Refsdal Supernova .

Web links

Commons : MACS J1149 Lensed Star 1 - collection of images, videos and audio files

Lars Fischer: Gravitational lens reveals the most distant star. In: Spektrum.de . Spektrum der Wissenschaft Verlagsgesellschaft mbH, April 3, 2018 .; accessed on June 20, 2020

Individual evidence

↑ ^a ^b Patrick L. Kelly, Jose M. Diego, Steven Rodney, Nick Kaiser, Tom Broadhurst, Adi Citrine, Tommaso Treu, Pablo G. Pérez-González, Takahiro Morishita, Mathilde Jauzac, Jonatan Selsing, Masamune Oguri, Laurent Pueyo, Timothy W. Ross, Alexei V. Filippenko, Nathan Smith, Jens Hjorth, S. Bradley Cenko, Xin Wang, D. Andrew Howell, Johan Richard, Brenda L. Frye, Saurabh W. Jha, Ryan J. Foley, Colin Norman, Marusa Bradac, Weikang Zheng, Gabriel Brammer, Alberto Molino Benito, Antonio Cava, Lise Christensen, Selma E. de Mink, Or Graur, Claudio Grillo, Ryota Kawamata, Jean-Paul Kneib, Thomas Matheson, Curtis McCully, Mario Nonino, Ismael Pérez -Fournon, Adam G. Riess, Piero Rosati, Kasper Borello Schmidt, Keren Sharon & Benjamin J. Weiner: Extreme magnification of an individual star at redshift 1.5 by a galaxy-cluster lens . In: Nature Astronomy . No. 2 , April 2, 2018, p. 334–342 , doi : 10.1038 / s41550-018-0430-3 , arxiv : 1706.10279 , bibcode : 2018NatAs ... 2..334K .

[Kelly18-1] Patrick L. Kelly, Jose M. Diego, Steven Rodney, Nick Kaiser, Tom Broadhurst, Adi Citrine, Tommaso Treu, Pablo G. Pérez-González, Takahiro Morishita, Mathilde Jauzac, Jonatan Selsing, Masamune Oguri, Laurent Pueyo, Timothy W. Ross, Alexei V. Filippenko, Nathan Smith, Jens Hjorth, S. Bradley Cenko, Xin Wang, D. Andrew Howell, Johan Richard, Brenda L. Frye, Saurabh W. Jha, Ryan J. Foley, Colin Norman, Marusa Bradac, Weikang Zheng, Gabriel Brammer, Alberto Molino Benito, Antonio Cava, Lise Christensen, Selma E. de Mink, Or Graur, Claudio Grillo, Ryota Kawamata, Jean-Paul Kneib, Thomas Matheson, Curtis McCully, Mario Nonino, Ismael Pérez -Fournon, Adam G. Riess, Piero Rosati, Kasper Borello Schmidt, Keren Sharon & Benjamin J. Weiner: Extreme magnification of an individual star at redshift 1.5 by a galaxy-cluster lens . In: Nature Astronomy . No. 2 , April 2, 2018, p. 334–342 , doi : 10.1038 / s41550-018-0430-3 , arxiv : 1706.10279 , bibcode : 2018NatAs ... 2..334K .