JWST''s PEARLS: transients in the MACS J0416.1-2403 field

With its unprecedented sensitivity and spatial resolution, the James Webb Space Telescope (JWST) has opened a new window for time-domain discoveries in the infrared. Here we report observations in the only field that has received four epochs (spanning 126 days) of JWST NIRCam observations in Cycle 1...

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Detalles Bibliográficos
Autores: Yan, Haojing, Ma, Zhiyuan, Sun, Bangzheng, Wang, Lifan, Kelly, Patrick, Diego Rodríguez, José María|||0000-0001-9065-3926, Cohen, Seth H., Windhorst, Rogier A., Jansen, Rolf A., Grogin, Norman A., Beacom, John F., Conselice, Christopher J., Driver, Simon P., Frye, Brenda, Coe, Dan, Marshall, Madeline A., Koekemoer, Anton, Willmer, Christopher N. A., Robotham, Aaron, D'Silva, Jordan C. J.
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/31617
Acceso en línea:https://hdl.handle.net/10902/31617
Access Level:acceso abierto
Palabra clave:Transient sources
Infrared sources
Gravitational lensing
Supernovae
Surveys
Descripción
Sumario:With its unprecedented sensitivity and spatial resolution, the James Webb Space Telescope (JWST) has opened a new window for time-domain discoveries in the infrared. Here we report observations in the only field that has received four epochs (spanning 126 days) of JWST NIRCam observations in Cycle 1. This field is toward MACS J0416.1−2403, which is a rich galaxy cluster at redshift z = 0.4 and is one of the Hubble Frontier Fields. We have discovered 14 transients from these data. Twelve of these transients happened in three galaxies (with z = 0.94, 1.01, and 2.091) crossing a lensing caustic of the cluster, and these transients are highly magnified by gravitational lensing. These 12 transients are likely of a similar nature to those previously reported based on the Hubble Space Telescope (HST) data in this field, i.e., individual stars in the highly magnified arcs. However, these 12 could not have been found by HST because they were too red and too faint. The other two transients are associated with background galaxies (z = 2.205 and 0.7093) that are only moderately magnified, and they are likely supernovae. They indicate a demagnified supernova surface density, when monitored at a time cadence of a few months to a ∼3–4 μm survey limit of AB ∼28.5 mag, of ∼0.5 arcmin−2 integrated to z ≈ 2. This survey depth is beyond the capability of HST but can be easily reached by JWST.

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