Seminario de Astrofísica en el IFIS. El próximo martes 26 de mayo a las 14:30 hrs, el Dr. Eduardo Ibar, académico de la Universidad de Valparaíso, presentará en el Instituto de Física el seminario:
“The JWST Emission Line Survey (JELS)”.
La presentación se realizará en la Sala 208 del Instituto de Física (IFIS), 2° piso, Edificio de Ciencias, Campus Curauma, PUCV.
Revisa el abstract de la presentación:
The H-alpha (Ha) emission is the best-calibrated star-formation rate (SFR) tracer. Previous to JWST, surveys mapped the evolution of Ha emitters out to the peak of the Cosmic SFR Density (CSFRD) at z~2.5. Beyond this redshift, samples of star-forming galaxies and estimates of the CSFRD were almost ubiquitously based on rest-frame UV observations with HST. In this talk, we describe new JWST NIRCam’s narrow-band filters to observe a 65 arcmin^2 in COSMOS to identify several 100s of line-emitting galaxies. We consider difference imaging between closely-spaced narrow and broad band filters, to find line-emitting galaxies to provide the first clean and robust sample of homogeneously selected star-forming galaxies into the Epoch of Reionization (at z~6.2 and 8.2). We measure the ionised gas structures of these galaxies at sub-kpc resolution, determine how the relationship between UV and ionised gas varies with host galaxy properties, and tackle the physical processes driving the star formation activity at different reshifts. We describe also the properties of a newly discovered population of Paschen emitters at Cosmic Noon (Pa-alpha@z~1.5, Pa-beta@z~2.6) including their SED properties, their contribution to the CSFRD, and upcoming future follow-up campaigns.
Extendemos la invitación a la comunidad PUCV y al público interesado.
