Constraints on the population of Galactic objects in the JWST UNCOVER survey catalogue

The paper assesses the potential galactic nature of small distant objects (also known as ``little red dots'') in the SUPER galaxy catalogue of the James Webb Space Telescope (JWST) UNCOVER survey. The estimate is based on the assumption that these objects could be brown dwarfs or similar objects with temperatures of a few hundred degrees – if the radiation from the low-temperature bodies was interpreted as the photometric redshift of a typical galaxy. The hypothetical number density of these objects in our galaxy is calculated, such as to match the observed number of ``little red dots'' in the survey. The physical possibility of having this number density in our Galaxy is discarded as contradictory to the dynamical constraints based on the halo mass of our Galaxy estimated elsewhere.

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Published
2024-12-27
DOI
https://doi.org/10.26119/vak2024.031
Primary Topic
Stellar, planetary, and galactic studies
Type
article
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article

Constraints on the population of Galactic objects in the JWST UNCOVER survey catalogue

A. A. Raikov, N. Yu. Lovyagin, V. N. Yershov
Stellar, planetary, and galactic studies
article

Constraints on the population of Galactic objects in the JWST UNCOVER survey catalogue

A. A. Raikov, N. Yu. Lovyagin, V. N. Yershov
article en

Abstract

The paper assesses the potential galactic nature of small distant objects (also known as ``little red dots'') in the SUPER galaxy catalogue of the James Webb Space Telescope (JWST) UNCOVER survey. The estimate is based on the assumption that these objects could be brown dwarfs or similar objects with temperatures of a few hundred degrees – if the radiation from the low-temperature bodies was interpreted as the photometric redshift of a typical galaxy. The hypothetical number density of these objects in our galaxy is calculated, such as to match the observed number of ``little red dots'' in the survey. The physical possibility of having this number density in our Galaxy is discarded as contradictory to the dynamical constraints based on the halo mass of our Galaxy estimated elsewhere.

Saint Petersburg State University of Aerospace and Instrumentation (RU), St Petersburg University (RU), Special Astrophysical Observatory (RU)
Openalex Percentile: Top 82%
Stellar, planetary, and galactic studies
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