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How dark the sky: the JWST backgrounds
Jane R. Rigby, Paul A. Lightsey, Macarena García Marín +17
We describe the sources of stray light and thermal background that affect JWST observations, report actual backgrounds as measured from commissioning and early-science observations…
What Are Those Tiny Things? A First Study of Compact Star Clusters in the SMACS0723 Field with JWST
Andreas L. Faisst, Ranga Ram Chary, Gabriel Brammer +1
We use the unprecedented resolution and depth of the JWST NIRCam Early Release Observations at 1-5 m to study the stellar mass, age, and metallicity of compact star clusters in…
Insights into physical conditions and magnetic fields from high redshift quasars
Bomee Lee, Ranga-Ram Chary
We use archival WISE and Spitzer photometry to derive optical line fluxes for a sample of distant quasars at z ~6. We find evidence for exceptionally high equivalent width [OIII] e…
Tentative Evidence for Transit Timing Variations of WASP-161b
Fan Yang, Ranga-Ram Chary
We report on the detection of transit timing variations (TTV) of WASP-161b by using the combination of TESS data and archival data. The midpoint of the transits in TESS data are of…
Joint Survey Processing II: Stellar Proper Motions in the COSMOS Field, from Hubble Space Telescope ACS and Subaru Telescope HSC Observations
Sergio B. Fajardo-Acosta, Andreas Faisst, Carl J. Grillmair +4
We analyze stellar proper motions in the COSMOS field to assess the presence of bulk motions. At bright magnitudes (G-band 18.5--20.76 AB), we use the proper motions of 1,010 stars…
GOODS-ALMA 2.0: Starbursts in the main sequence reveal compact star formation regulating galaxy evolution prequenching
C. Gómez-Guijarro, D. Elbaz, M. Xiao +38
Compact star formation appears to be generally common in dusty star-forming galaxies (SFGs). However, its role in the framework set by the scaling relations in galaxy evolution rem…