JWST Imaging of Earendel, the Extremely Magnified Star at Redshift \(z=6.2\)
The gravitationally lensed star WHL0137-LS, nicknamed Earendel, was identified with a photometric redshift \(z_{phot} = 6.2 \pm 0.1\) based on images taken with the Hubble Space Telescope. Here we present James Webb Space Telescope (JWST) Near Infrared Camera (NIRCam) images of Earendel in 8 filters...
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| creator | Welch, Brian Coe, Dan Zackrisson, Erik de Mink, S E Ravindranath, Swara Anderson, Jay Brammer, Gabriel Bradley, Larry Yoon, Jinmi Kelly, Patrick Diego, Jose M Windhorst, Rogier Zitrin, Adi Dimauro, Paola Jimenez-Teja, Yolanda Abdurro'uf Nonino, Mario Acebron, Ana Andrade-Santos, Felipe Avila, Roberto J Bayliss, Matthew B Benitez, Alex Broadhurst, Tom Bhatawdekar, Rachana Bradac, Marusa Caminha, Gabriel Chen, Wenlei Eldridge, Jan Farag, Ebraheem Florian, Michael Frye, Brenda Fujimoto, Seiji Gomez, Sebastian Henry, Alaina Hsiao, Tiger Y -Y Hutchison, Taylor A James, Bethan L Joyce, Meridith Jung, Intae Khullar, Gourav Larson, Rebecca L Mahler, Guillaume Mandelker, Nir McCandliss, Stephan Morishita, Takahiro Newshore, Rosa Norman, Colin O'Connor, Kyle Oesch, Pascal A Oguri, Masamune Ouichi, Masami Postman, Marc Rigby, Jane R Ryan, Russell E Sharma, Soniya Keren, Sharon Strait, Victoria Louis-Gregory Strolger Timmes, F X Toft, Sune Trenti, Michele Vanzella, Eros Vikaeus, Anton |
| description | The gravitationally lensed star WHL0137-LS, nicknamed Earendel, was identified with a photometric redshift \(z_{phot} = 6.2 \pm 0.1\) based on images taken with the Hubble Space Telescope. Here we present James Webb Space Telescope (JWST) Near Infrared Camera (NIRCam) images of Earendel in 8 filters spanning 0.8--5.0\(\mu\)m. In these higher resolution images, Earendel remains a single unresolved point source on the lensing critical curve, increasing the lower limit on the lensing magnification to \(\mu > 4000\) and restricting the source plane radius further to \(r < 0.02\) pc, or \(\sim 4000\) AU. These new observations strengthen the conclusion that Earendel is best explained by an individual star or multiple star system, and support the previous photometric redshift estimate. Fitting grids of stellar spectra to our photometry yields a stellar temperature of \(T_{\mathrm{eff}} \simeq 13000\)--16000 K assuming the light is dominated by a single star. The delensed bolometric luminosity in this case ranges from \(\log(L) = 5.8\)--6.6 \(L_{\odot}\), which is in the range where one expects luminous blue variable stars. Follow-up observations, including JWST NIRSpec scheduled for late 2022, are needed to further unravel the nature of this object, which presents a unique opportunity to study massive stars in the first billion years of the universe. |
| doi_str_mv | 10.48550/arxiv.2208.09007 |
| format | Article |
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Here we present James Webb Space Telescope (JWST) Near Infrared Camera (NIRCam) images of Earendel in 8 filters spanning 0.8--5.0\(\mu\)m. In these higher resolution images, Earendel remains a single unresolved point source on the lensing critical curve, increasing the lower limit on the lensing magnification to \(\mu > 4000\) and restricting the source plane radius further to \(r < 0.02\) pc, or \(\sim 4000\) AU. These new observations strengthen the conclusion that Earendel is best explained by an individual star or multiple star system, and support the previous photometric redshift estimate. Fitting grids of stellar spectra to our photometry yields a stellar temperature of \(T_{\mathrm{eff}} \simeq 13000\)--16000 K assuming the light is dominated by a single star. The delensed bolometric luminosity in this case ranges from \(\log(L) = 5.8\)--6.6 \(L_{\odot}\), which is in the range where one expects luminous blue variable stars. Follow-up observations, including JWST NIRSpec scheduled for late 2022, are needed to further unravel the nature of this object, which presents a unique opportunity to study massive stars in the first billion years of the universe.</description><identifier>EISSN: 2331-8422</identifier><identifier>DOI: 10.48550/arxiv.2208.09007</identifier><language>eng</language><publisher>Ithaca: Cornell University Library, arXiv.org</publisher><subject>Hubble Space Telescope ; Infrared cameras ; Infrared imagery ; Infrared telescopes ; James Webb Space Telescope ; Luminosity ; Massive stars ; Photometry ; Red shift ; Space telescopes ; Stellar spectra ; Stellar temperature ; Universe ; Variable stars</subject><ispartof>arXiv.org, 2022-11</ispartof><rights>2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). 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Follow-up observations, including JWST NIRSpec scheduled for late 2022, are needed to further unravel the nature of this object, which presents a unique opportunity to study massive stars in the first billion years of the universe.</description><subject>Hubble Space Telescope</subject><subject>Infrared cameras</subject><subject>Infrared imagery</subject><subject>Infrared telescopes</subject><subject>James Webb Space Telescope</subject><subject>Luminosity</subject><subject>Massive stars</subject><subject>Photometry</subject><subject>Red shift</subject><subject>Space telescopes</subject><subject>Stellar spectra</subject><subject>Stellar temperature</subject><subject>Universe</subject><subject>Variable 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Felipe</au><au>Avila, Roberto J</au><au>Bayliss, Matthew B</au><au>Benitez, Alex</au><au>Broadhurst, Tom</au><au>Bhatawdekar, Rachana</au><au>Bradac, Marusa</au><au>Caminha, Gabriel</au><au>Chen, Wenlei</au><au>Eldridge, Jan</au><au>Farag, Ebraheem</au><au>Florian, Michael</au><au>Frye, Brenda</au><au>Fujimoto, Seiji</au><au>Gomez, Sebastian</au><au>Henry, Alaina</au><au>Hsiao, Tiger Y -Y</au><au>Hutchison, Taylor A</au><au>James, Bethan L</au><au>Joyce, Meridith</au><au>Jung, Intae</au><au>Khullar, Gourav</au><au>Larson, Rebecca L</au><au>Mahler, Guillaume</au><au>Mandelker, Nir</au><au>McCandliss, Stephan</au><au>Morishita, Takahiro</au><au>Newshore, Rosa</au><au>Norman, Colin</au><au>O'Connor, Kyle</au><au>Oesch, Pascal A</au><au>Oguri, Masamune</au><au>Ouichi, Masami</au><au>Postman, Marc</au><au>Rigby, Jane R</au><au>Ryan, Russell E</au><au>Sharma, Soniya</au><au>Keren, Sharon</au><au>Strait, Victoria</au><au>Louis-Gregory Strolger</au><au>Timmes, F X</au><au>Toft, Sune</au><au>Trenti, Michele</au><au>Vanzella, Eros</au><au>Vikaeus, Anton</au><format>book</format><genre>document</genre><ristype>GEN</ristype><atitle>JWST Imaging of Earendel, the Extremely Magnified Star at Redshift \(z=6.2\)</atitle><jtitle>arXiv.org</jtitle><date>2022-11-09</date><risdate>2022</risdate><eissn>2331-8422</eissn><abstract>The gravitationally lensed star WHL0137-LS, nicknamed Earendel, was identified with a photometric redshift \(z_{phot} = 6.2 \pm 0.1\) based on images taken with the Hubble Space Telescope. Here we present James Webb Space Telescope (JWST) Near Infrared Camera (NIRCam) images of Earendel in 8 filters spanning 0.8--5.0\(\mu\)m. In these higher resolution images, Earendel remains a single unresolved point source on the lensing critical curve, increasing the lower limit on the lensing magnification to \(\mu > 4000\) and restricting the source plane radius further to \(r < 0.02\) pc, or \(\sim 4000\) AU. These new observations strengthen the conclusion that Earendel is best explained by an individual star or multiple star system, and support the previous photometric redshift estimate. Fitting grids of stellar spectra to our photometry yields a stellar temperature of \(T_{\mathrm{eff}} \simeq 13000\)--16000 K assuming the light is dominated by a single star. The delensed bolometric luminosity in this case ranges from \(\log(L) = 5.8\)--6.6 \(L_{\odot}\), which is in the range where one expects luminous blue variable stars. Follow-up observations, including JWST NIRSpec scheduled for late 2022, are needed to further unravel the nature of this object, which presents a unique opportunity to study massive stars in the first billion years of the universe.</abstract><cop>Ithaca</cop><pub>Cornell University Library, arXiv.org</pub><doi>10.48550/arxiv.2208.09007</doi><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | EISSN: 2331-8422 |
| ispartof | arXiv.org, 2022-11 |
| issn | 2331-8422 |
| language | eng |
| recordid | cdi_proquest_journals_2705198453 |
| source | Freely Accessible Journals |
| subjects | Hubble Space Telescope Infrared cameras Infrared imagery Infrared telescopes James Webb Space Telescope Luminosity Massive stars Photometry Red shift Space telescopes Stellar spectra Stellar temperature Universe Variable stars |
| title | JWST Imaging of Earendel, the Extremely Magnified Star at Redshift \(z=6.2\) |
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