First Look at z > 1 Bars in the Rest-frame Near-infrared with JWST Early CEERS Imaging

Guo, Yuchen; Jogee, Shardha; Finkelstein, Steven L.; Chen, Zilei; Wise, Eden; Bagley, Micaela B.; Barro, Guillermo; Wuyts, Stijn; Kocevski, Dale D.; Kartaltepe, Jeyhan S.; McGrath, Elizabeth J.; Ferguson, Henry C.; Mobasher, Bahram; Giavalisco, Mauro; Lucas, Ray A.; Zavala, Jorge A.; Lotz, Jennifer M.; Grogin, Norman A.; Huertas-Company, Marc; Vega-Ferrero, Jesús; Hathi, Nimish P.; Haro, Pablo Arrabal; Dickinson, Mark; Koekemoer, Anton M.; Papovich, Casey; Pirzkal, Nor; Aaron Yung, L. Y.; Backhaus, Bren E.; Bell, Eric F.; Calabrò, Antonello; Cleri, Nikko J.; Coogan, Rosemary T.; Cooper, M. C.; Costantin, Luca; Croton, Darren; Davis, Kelcey; Dekel, Avishai; Franco, Maximilien; Gardner, Jonathan P.; Holwerda, Benne W.; Hutchison, Taylor A.; Pandya, Viraj; Pérez-González, Pablo G.; Ravindranath, Swara; Rose, Caitlin; Trump, Jonathan R.; de la Vega, Alexander; Wang, Weichen
Referencia bibliográfica

The Astrophysical Journal

Fecha de publicación:
Número de autores
Número de autores del IAC
Número de citas
Número de citas referidas
Stellar bars are key drivers of secular evolution in galaxies and can be effectively studied using rest-frame near-infrared (NIR) images, which trace the underlying stellar mass and are less impacted by dust and star formation than rest-frame UV or optical images. We leverage the power of JWST CEERS NIRCam images to present the first quantitative identification and characterization of stellar bars at z > 1 based on rest-frame NIR F444W images of high resolution (~1.3 kpc at z ~ 1-3). We identify stellar bars in these images using quantitative criteria based on ellipse fits. For this pilot study, we present six examples of robustly identified bars at z > 1 with spectroscopic redshifts, including the two highest-redshift bars at z ~ 2.136 and 2.312 quantitatively identified and characterized to date. The stellar bars at z ~ 1.1-2.3 presented in our study have projected semimajor axes of ~2.9-4.3 kpc and projected ellipticities of ~0.41-0.53 in the rest-frame NIR. The barred host galaxies have stellar masses ~1 × 1010 to 2 × 1011 M ⊙ and star formation rates of ~21-295 M ⊙ yr-1, and several have potential nearby companions. Our finding of bars at z ~ 1.1-2.3 demonstrates the early onset of such instabilities and supports simulations where bars form early in massive dynamically cold disks. It also suggests that if these bars at lookback times of 8-11 Gyr survive out to present epochs, bar-driven secular processes may operate over a long time and have a significant impact on some galaxies by z ~ 0.
Proyectos relacionados
Miembros del grupo
Huellas de la Formación de las Galaxias: Poblaciones estelares, Dinámica y Morfología
Bienvenida a la página web del g rupo de investigación Traces of Galaxy Formation. Somos un grupo de investigación amplio, diverso y muy activo cuyo objetivo principal es entender la formación de galaxias en el Universo de una manera lo más completa posible. Con el estudio detellado de las poblaciones estelares como bandera, estamos constantemente
Martín Navarro