Extreme magnification by lensing galaxy clusters allows the detection of high-luminosity stars during cluster caustic transient events at cosmological distances. The Dragon Arc at z=0.725 is a frontier target for identifying transient events due to its high frequency of microlensing events, and so far>100 of these events have been detected. The high frequency of events and high cadence of observations allow for the measurement of minimal flux variation between epochs, and therefore the magnification evolution as a source approaches or recedes from a microcaustic can be measured from light curves. In this work, we model the light curves of 10 transient events in the Dragon Arc across eight epochs from two JWST/NIRCam medium-band filters taken over four days. Injected synthetic observations demonstrate that with additional observations, individual transient light curves allow the of apparent degeneracies between stellar characteristics and properties of motion.
Understanding the properties of the first generation of galaxies is an ongoing challenge in observational astrophysics. James Webb Space Telescope deep-field observations have led to the identification of large numbers of galaxies within the Epoch of Reionization (EoR); however, it remains observationally challenging t...
Joshua Roberson, M. Bayliss, M. Gladders et al.· Astrophysical Journal· 0 citations
Population III (Pop III) stars are hypothetical zero-metallicity stellar structures formed from primordial hydrogen and helium. They are theorized to span a wide mass range, extending to several 100 solar masses, and may have played important roles in nucleosynthesis and reionization. Their expected fluxes are far belo...
Jakob Perivolotis, P. Bergamini, R. Windhorst et al.· 1 citation
The extreme brightness of high-z strongly lensed galaxies detected by Planck surveys, thanks to their exceptionally large gravitational magnifications, offers a unique opportunity to investigate their structure and kinematics during their active star formation phase in extraordinary detail. As a step in this direction,...
L. Trobbiani, M. Bonato, I. Baronchelli et al.· Astronomy & Astrophysics· 0 citations
Supermassive black hole binaries (SMBHB) are expected at the center of galaxies as a result of galaxy mergers. The dynamics and evolution of SMBHBs shed light on the evolution and formation of galaxies, the gravitational wave background and the nature of gravity. Many methods have been proposed to identify sub-parsec S...
Han-Xi Wang, B. Kocsis, Miguel Zumalacárregui· 0 citations
A growing number of white dwarfs (WDs) have been observed to exhibit broadband photometric variability indicative of transiting material from the remnants of their planetary systems. The transits typically arise from comet-like bodies, asymmetric disks, or other non-solid structures and exhibit temporally varying morph...
J. Korth, A. Mustill, H. Parviainen· Research Notes of the AAS· 0 citations
Recent James Webb Space Telescope spectroscopic surveys reveal an abundance of rapidly assembled early galaxies in the first billion years. Cosmological simulations struggle to reproduce this population because models require a rapid, highly efficient conversion of baryons into stars followed by an abrupt cessation of...
R. Pan, D. Marchesini, J. Allingham et al.· 0 citations
We use cookies to run the site and, with your consent, for analytics and to show ads.
See our Cookie Policy.
