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JWST Imaging of Earendel, the Extremely Magnified Star at Redshift z = 6.2

Welch, Brian and Coe, Dan and Zackrisson, Erik and de Mink, S. E. and Ravindranath, Swara and Anderson, Jay and Brammer, Gabriel and Bradley, Larry and Yoon, Jinmi and Kelly, Patrick and Diego, Jose M. and Windhorst, Rogier and Zitrin, Adi and Dimauro, Paola and Jiménez-Teja, Yolanda and Nonino, Mario and Acebron, Ana and Andrade-Santos, Felipe and Avila, Roberto J. and Bayliss, Matthew B. and Benítez, Alex and Broadhurst, Tom and Bhatawdekar, Rachana and Bradač, Maruša and Caminha, Gabriel B. and Chen, Wenlei and Eldridge, Jan and Farag, Ebraheem and Florian, Michael and Frye, Brenda and Fujimoto, Seiji and Gomez, Sebastian and Henry, Alaina and Hsiao, Tiger Y.-Y and Hutchison, Taylor A. and James, Bethan L. and Joyce, Meridith and Jung, Intae and Khullar, Gourav and Larson, Rebecca L. and Mahler, Guillaume and Mandelker, Nir and McCandliss, Stephan and Morishita, Takahiro and Newshore, Rosa and Norman, Colin and O’Connor, Kyle and Oesch, Pascal A. and Oguri, Masamune and Ouchi, Masami and Postman, Marc and Rigby, Jane R. and Ryan Jr, Russell E. and Sharma, Soniya and Sharon, Keren and Strait, Victoria and Strolger, Louis-Gregory and Timmes, F. X. and Toft, Sune and Trenti, Michele and Vanzella, Eros and Vikaeus, Anton (2022) JWST Imaging of Earendel, the Extremely Magnified Star at Redshift z = 6.2. Astrophysical Journal Letters, 940 (1). Art. No. L1. ISSN 2041-8205. doi:10.3847/2041-8213/ac9d39.

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The gravitationally lensed star WHL 0137–LS, nicknamed Earendel, was identified with a photometric redshift z_phot = 6.2 ± 0.1 based on images taken with the Hubble Space Telescope. Here we present James Webb Space Telescope (JWST) Near Infrared Camera images of Earendel in eight filters spanning 0.8–5.0 μm. 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 μ > 4000 and restricting the source plane radius further to r T_(eff) ≃ 13,000–16,000 K, assuming the light is dominated by a single star. The delensed bolometric luminosity in this case ranges from log(L) = 5.8 to 6.6 L_⊙, 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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Welch, Brian0000-0003-1815-0114
Coe, Dan0000-0001-7410-7669
Zackrisson, Erik0000-0003-1096-2636
de Mink, S. E.0000-0001-9336-2825
Ravindranath, Swara0000-0002-5269-6527
Anderson, Jay0000-0003-2861-3995
Brammer, Gabriel0000-0003-2680-005X
Bradley, Larry0000-0002-7908-9284
Yoon, Jinmi0000-0002-4168-239X
Kelly, Patrick0000-0003-3142-997X
Diego, Jose M.0000-0001-9065-3926
Windhorst, Rogier0000-0001-8156-6281
Zitrin, Adi0000-0002-0350-4488
Dimauro, Paola0000-0001-7399-2854
Jiménez-Teja, Yolanda0000-0002-6090-2853
Nonino, Mario0000-0001-6342-9662
Acebron, Ana0000-0003-3108-9039
Andrade-Santos, Felipe0000-0002-8144-9285
Avila, Roberto J.0000-0001-9364-5577
Bayliss, Matthew B.0000-0003-1074-4807
Benítez, Alex0000-0002-0705-3178
Broadhurst, Tom0000-0002-8785-8979
Bhatawdekar, Rachana0000-0003-0883-2226
Bradač, Maruša0000-0001-5984-0395
Caminha, Gabriel B.0000-0001-6052-3274
Chen, Wenlei0000-0003-1060-0723
Eldridge, Jan0000-0002-1722-6343
Farag, Ebraheem0000-0002-5794-4286
Florian, Michael0000-0001-5097-6755
Frye, Brenda0000-0003-1625-8009
Fujimoto, Seiji0000-0001-7201-5066
Gomez, Sebastian0000-0001-6395-6702
Henry, Alaina0000-0002-6586-4446
Hsiao, Tiger Y.-Y0000-0003-4512-8705
Hutchison, Taylor A.0000-0001-6251-4988
James, Bethan L.0000-0003-4372-2006
Joyce, Meridith0000-0002-8717-127X
Jung, Intae0000-0003-1187-4240
Khullar, Gourav0000-0002-3475-7648
Larson, Rebecca L.0000-0003-2366-8858
Mahler, Guillaume0000-0003-3266-2001
Mandelker, Nir0000-0001-8057-5880
McCandliss, Stephan0000-0003-0503-4667
Morishita, Takahiro0000-0002-8512-1404
Norman, Colin0000-0002-5222-5717
Oesch, Pascal A.0000-0001-5851-6649
Oguri, Masamune0000-0003-3484-399X
Ouchi, Masami0000-0002-1049-6658
Postman, Marc0000-0002-9365-7989
Rigby, Jane R.0000-0002-7627-6551
Ryan Jr, Russell E.0000-0003-0894-1588
Sharma, Soniya0000-0001-9851-8753
Sharon, Keren0000-0002-7559-0864
Strait, Victoria0000-0002-6338-7295
Strolger, Louis-Gregory0000-0002-7756-4440
Timmes, F. X.0000-0002-0474-159X
Toft, Sune0000-0003-3631-7176
Trenti, Michele0000-0001-9391-305X
Vanzella, Eros0000-0002-5057-135X
Vikaeus, Anton0000-0002-4853-1076
Additional Information:This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope (JWST). The data were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute (STScI), which is operated by the Association of Universities for Research in Astronomy (AURA), Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with program JWST GO 2282. E.Z. acknowledges support from the Swedish National Space Board. M.B. acknowledges support from the Slovenian national research agency ARRS through grant N1-0238. A.Z. acknowledges support by grant No. 2020750 from the United States–Israel Binational Science Foundation (BSF) and grant No. 2109066 from the United States National Science Foundation (NSF) and by the Ministry of Science & Technology, Israel. M.T. acknowledges support by the Australian Research Council Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D) through project No. CE170100013. The Cosmic Dawn Center (DAWN) is funded by the Danish National Research Foundation under grant No. 140. J.M.D. acknowledges the support of projects PGC2018-101814-B-100 and MDM-2017-0765. Y.J.-T. acknowledges financial support from the European Union's Horizon 2020 research and innovation program under Marie Skłodowska-Curie grant agreement No. 898633, the MSCA IF Extensions Program of the Spanish National Research Council (CSIC), and the State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award to the Instituto de Astrofísica de Andalucía (SEV-2017-0709). P.A.O. acknowledges support by the Swiss National Science Foundation through project grant 200020_207349.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASANAS 5-03127
Swedish National Space Board (SNSB)UNSPECIFIED
Slovenian Research AgencyN1-0238
Binational Science Foundation (USA-Israel)2020750
Ministry of Science and Technology (Israel)UNSPECIFIED
Australian Research CouncilCE170100013
Danish National Research Foundation140
Ministerio de Ciencia, Innovación y Universidades (MICIU)PGC2018-101814-B-100
Unidad de Excelencia María de MaeztuMDM-2017-0765
Marie Curie Fellowship898633
Severo OchoaSEV-2017-0709
Swiss National Science Foundation (SNSF)200020_207349
Issue or Number:1
Record Number:CaltechAUTHORS:20221206-901635600.8
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:118257
Deposited By: Research Services Depository
Deposited On:06 Jan 2023 21:09
Last Modified:06 Jan 2023 21:09

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