Templates for Fitting Photometry of Ultra-high-redshift Galaxies

Research output: Contribution to journal › Letter › Research › peer-review

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Templates for Fitting Photometry of Ultra-high-redshift Galaxies. / Steinhardt, Charles L.; Kokorev, Vasily; Rusakov, Vadim; Garcia, Ethan; Sneppen, Albert.

In: Astrophysical Journal Letters, Vol. 951, No. 2, L40, 12.07.2023.

Research output: Contribution to journal › Letter › Research › peer-review

Harvard

Steinhardt, CL, Kokorev, V, Rusakov, V, Garcia, E & Sneppen, A 2023, 'Templates for Fitting Photometry of Ultra-high-redshift Galaxies', Astrophysical Journal Letters, vol. 951, no. 2, L40. https://doi.org/10.3847/2041-8213/acdef6

APA

Steinhardt, C. L., Kokorev, V., Rusakov, V., Garcia, E., & Sneppen, A. (2023). Templates for Fitting Photometry of Ultra-high-redshift Galaxies. Astrophysical Journal Letters, 951(2), [L40]. https://doi.org/10.3847/2041-8213/acdef6

Vancouver

Steinhardt CL, Kokorev V, Rusakov V, Garcia E, Sneppen A. Templates for Fitting Photometry of Ultra-high-redshift Galaxies. Astrophysical Journal Letters. 2023 Jul 12;951(2). L40. https://doi.org/10.3847/2041-8213/acdef6

Author

Steinhardt, Charles L. ; Kokorev, Vasily ; Rusakov, Vadim ; Garcia, Ethan ; Sneppen, Albert. / Templates for Fitting Photometry of Ultra-high-redshift Galaxies. In: Astrophysical Journal Letters. 2023 ; Vol. 951, No. 2.

Bibtex

@article{b942d9090bd0416fa8664add0e0d7ddb,

title = "Templates for Fitting Photometry of Ultra-high-redshift Galaxies",

abstract = "Recent data from the James Webb Space Telescope allow a first glimpse of galaxies at z ≳ 11. The most successful tool for identifying ultra-high-redshift candidates and inferring their properties is photometric template fitting. However, current methods rely on templates derived from much lower-redshift conditions, including stellar populations older than the age of the Universe at z > 12, a stellar initial mass function that is physically disallowed at z > 6, and weaker emission lines than currently observed at z > 7.5. Here, two sets of synthetic templates, optimized for the expected astrophysics of galaxies at 8 < z < 12 and z > 12, are developed and used to fit three galaxies at z > 12 from the SMACS0723 field. Using these improved templates, quantitative estimates are produced of the bias in inferred properties from JWST observations at z > 8 due to these effects. The best-fit redshifts are similar to those found with previous template sets, but the inferred stellar masses drop by as much as 1-1.6 dex, such that stellar masses are no longer seemingly inconsistent with ΛCDM. The two new template sets are released in formats compatible with EAZY and LePhare.",

author = "Steinhardt, {Charles L.} and Vasily Kokorev and Vadim Rusakov and Ethan Garcia and Albert Sneppen",

note = "Publisher Copyright: {\textcopyright} 2023. The Author(s). Published by the American Astronomical Society.",

year = "2023",

month = jul,

day = "12",

doi = "10.3847/2041-8213/acdef6",

language = "English",

volume = "951",

journal = "The Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing",

number = "2",

}

RIS

TY - JOUR

T1 - Templates for Fitting Photometry of Ultra-high-redshift Galaxies

AU - Steinhardt, Charles L.

AU - Kokorev, Vasily

AU - Rusakov, Vadim

AU - Garcia, Ethan

AU - Sneppen, Albert

PY - 2023/7/12

Y1 - 2023/7/12

N2 - Recent data from the James Webb Space Telescope allow a first glimpse of galaxies at z ≳ 11. The most successful tool for identifying ultra-high-redshift candidates and inferring their properties is photometric template fitting. However, current methods rely on templates derived from much lower-redshift conditions, including stellar populations older than the age of the Universe at z > 12, a stellar initial mass function that is physically disallowed at z > 6, and weaker emission lines than currently observed at z > 7.5. Here, two sets of synthetic templates, optimized for the expected astrophysics of galaxies at 8 < z < 12 and z > 12, are developed and used to fit three galaxies at z > 12 from the SMACS0723 field. Using these improved templates, quantitative estimates are produced of the bias in inferred properties from JWST observations at z > 8 due to these effects. The best-fit redshifts are similar to those found with previous template sets, but the inferred stellar masses drop by as much as 1-1.6 dex, such that stellar masses are no longer seemingly inconsistent with ΛCDM. The two new template sets are released in formats compatible with EAZY and LePhare.

AB - Recent data from the James Webb Space Telescope allow a first glimpse of galaxies at z ≳ 11. The most successful tool for identifying ultra-high-redshift candidates and inferring their properties is photometric template fitting. However, current methods rely on templates derived from much lower-redshift conditions, including stellar populations older than the age of the Universe at z > 12, a stellar initial mass function that is physically disallowed at z > 6, and weaker emission lines than currently observed at z > 7.5. Here, two sets of synthetic templates, optimized for the expected astrophysics of galaxies at 8 < z < 12 and z > 12, are developed and used to fit three galaxies at z > 12 from the SMACS0723 field. Using these improved templates, quantitative estimates are produced of the bias in inferred properties from JWST observations at z > 8 due to these effects. The best-fit redshifts are similar to those found with previous template sets, but the inferred stellar masses drop by as much as 1-1.6 dex, such that stellar masses are no longer seemingly inconsistent with ΛCDM. The two new template sets are released in formats compatible with EAZY and LePhare.

U2 - 10.3847/2041-8213/acdef6

DO - 10.3847/2041-8213/acdef6

M3 - Letter

AN - SCOPUS:85165169993

VL - 951

JO - The Astrophysical Journal Letters

JF - The Astrophysical Journal Letters

SN - 2041-8205

IS - 2

M1 - L40

ER -

ID: 360815904

DAWN