JWST Imaging of Earendel, the Extremely Magnified Star at Redshift z=6.2
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JWST Imaging of Earendel, the Extremely Magnified Star at Redshift z=6.2. / 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 B.; 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; Ouchi, Masami; Postman, Marc; Rigby, Jane R.; Ryan, Russell E.; Sharma, Soniya; Sharon, Keren; Strait, Victoria; Strolger, Louis-Gregory; Timmes, F. X.; Toft, Sune; Trenti, Michele; Vanzella, Eros; Vikaeus, Anton.
In: Astrophysical Journal Letters, Vol. 940, No. 1, 1, 01.11.2022.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - JWST Imaging of Earendel, the Extremely Magnified Star at Redshift z=6.2
AU - Welch, Brian
AU - Coe, Dan
AU - Zackrisson, Erik
AU - de Mink, S. E.
AU - Ravindranath, Swara
AU - Anderson, Jay
AU - Brammer, Gabriel
AU - Bradley, Larry
AU - Yoon, Jinmi
AU - Kelly, Patrick
AU - Diego, Jose M.
AU - Windhorst, Rogier
AU - Zitrin, Adi
AU - Dimauro, Paola
AU - Jimenez-Teja, Yolanda
AU - Abdurro'uf, null
AU - Nonino, Mario
AU - Acebron, Ana
AU - Andrade-Santos, Felipe
AU - Avila, Roberto J.
AU - Bayliss, Matthew B.
AU - Benitez, Alex
AU - Broadhurst, Tom
AU - Bhatawdekar, Rachana
AU - Bradac, Marusa
AU - Caminha, Gabriel B.
AU - Chen, Wenlei
AU - Eldridge, Jan
AU - Farag, Ebraheem
AU - Florian, Michael
AU - Frye, Brenda
AU - Fujimoto, Seiji
AU - Gomez, Sebastian
AU - Henry, Alaina
AU - Hsiao, Tiger Y-Y
AU - Hutchison, Taylor A.
AU - James, Bethan L.
AU - Joyce, Meridith
AU - Jung, Intae
AU - Khullar, Gourav
AU - Larson, Rebecca L.
AU - Mahler, Guillaume
AU - Mandelker, Nir
AU - McCandliss, Stephan
AU - Morishita, Takahiro
AU - Newshore, Rosa
AU - Norman, Colin
AU - O'Connor, Kyle
AU - Oesch, Pascal A.
AU - Oguri, Masamune
AU - Ouchi, Masami
AU - Postman, Marc
AU - Rigby, Jane R.
AU - Ryan, Russell E.
AU - Sharma, Soniya
AU - Sharon, Keren
AU - Strait, Victoria
AU - Strolger, Louis-Gregory
AU - Timmes, F. X.
AU - Toft, Sune
AU - Trenti, Michele
AU - Vanzella, Eros
AU - Vikaeus, Anton
PY - 2022/11/1
Y1 - 2022/11/1
N2 - 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 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 similar to 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 (eff) similar to 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 L-theta, 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.
AB - 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 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 similar to 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 (eff) similar to 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 L-theta, 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.
KW - PHYSICAL-PROPERTIES
KW - MODEL ATMOSPHERES
KW - LENSING ANALYSIS
KW - NEARBY GALAXIES
KW - LUMINOUS STARS
KW - O-STARS
KW - MASS
KW - EVOLUTION
KW - UNCERTAINTIES
KW - PROPAGATION
U2 - 10.3847/2041-8213/ac9d39
DO - 10.3847/2041-8213/ac9d39
M3 - Journal article
VL - 940
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 1
M1 - 1
ER -
ID: 327935808