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  A highly magnified star at redshift 6.2

Brian, W., Coe, D., Diego, J. M., Zitrin, A., Zackrisson, E., Dimauro, P., et al. (2022). A highly magnified star at redshift 6.2. Nature, 603, 815-818. doi:10.1038/s41586-022-04449-y.

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 Creators:
Brian , Welch, Author
Coe, Dan, Author
Diego, Jose M., Author
Zitrin, Adi, Author
Zackrisson, Erik, Author
Dimauro, Paola, Author
Jiménez-Teja, Yolanda, Author
Kelly, Patrick, Author
Mahler, Guillaume, Author
Oguri, Masamune, Author
Timmes, F. X., Author
Windhorst, Rogier, Author
Florian, Michael, Author
de Mink, S. E.1, Author           
Avila, Roberto J., Author
Anderson, Jay, Author
Bradley, Larry, Author
Sharon, Keren, Author
Vikaeus, Anton, Author
McCandliss, Stephan, Author
Bradač, Maruša, AuthorRigby, Jane, AuthorFrye, Brenda, AuthorToft, Sune, AuthorStrait, Victoria, AuthorTrenti, Michele, AuthorSharma, Soniya, AuthorAndrade-Santos, Felipe, AuthorBroadhurst, Tom, Author more..
Affiliations:
1MPI for Astrophysics, Max Planck Society, ou_159875              

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 Abstract: Galaxy clusters magnify background objects through strong gravitational lensing. Typical magnifications for lensed galaxies are factors of a few but can also be as high as tens or hundreds, stretching galaxies into giant arcs. Individual stars can attain even higher magnifications given fortuitous alignment with the lensing cluster. Recently, several individual stars at redshifts between approximately 1 and 1.5 have been discovered, magnified by factors of thousands, temporarily boosted by microlensing. Here we report observations of a more distant and persistent magnified star at a redshift of 6.2 ± 0.1, 900 million years after the Big Bang. This star is magnified by a factor of thousands by the foreground galaxy cluster lens WHL0137–08 (redshift 0.566), as estimated by four independent lens models. Unlike previous lensed stars, the magnification and observed brightness (AB magnitude, 27.2) have remained roughly constant over 3.5 years of imaging and follow-up. The delensed absolute UV magnitude, −10 ± 2, is consistent with a star of mass greater than 50 times the mass of the Sun. Confirmation and spectral classification are forthcoming from approved observations with the James Webb Space Telescope.

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Language(s): eng - English
 Dates: 2022-03-30
 Publication Status: Published online
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 Identifiers: DOI: 10.1038/s41586-022-04449-y
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Title: Nature
  Abbreviation : Nature
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 603 Sequence Number: - Start / End Page: 815 - 818 Identifier: ISSN: 0028-0836
CoNE: https://pure.mpg.de/cone/journals/resource/954925427238