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Recent JWST Science Highlights


The effect of baryonic streaming motions on the formation of the first supermassive black holes.

Why JWST is important:-Baryonic streaming (the relative motion of baryons against dark matter) can suppress the formation Population III stars at high redshifts. This effect may also suppress the number density of luminous quasars at z~11, which could be detected by JWST. (click here for the abstract)

Reference: Takamitsu L. Tanaka, Max Planck Institute for Astrophysics, Co-authors:-Miao Li, Zoltan Haiman, 2013MNRAS.435.3559T

Tanaka Fig4
Figure 4. 2013MNRAS.435.3559T
Simulating the assembly of galaxies at redshifts z = 6 - 12

Why JWST is important:- We find that at redshifts z= 6-9, galaxies that are expected to be detected by the JWST contain about 1.5 times more stellar mass as compared to the larger and more luminous galaxies that have been observed as of date; the JWST will be instrumental in shedding light on the properties of such faint galaxies, in which most of the stellar mass is locked up at these high-redshifts. We also show that the JWST will be instrumental in pinning down the faint end slope of the UV LFs, shedding light on the physics driving star formation in these objects, as well as clarifying their contribution to the process of cosmic reionization.
(click here for the abstract)

Reference: Pratika Dayal,Institute for Astronomy, University of Edinburgh U.K., Co-authors:-James S. Dunlop, Umberto Maio & Benedetta Ciardi, 2013MNRAS.434.1486D

Dayal Fig1
Figure 1. 2013MNRAS.434.1486D
Improving dark energy constraints with high-redshift Type Ia supernovae from CANDELS and CLASH

Why JWST is important:-We simulated a set of high redshift supernovae with the JWST redshift distribution and used them: (I) to study how they improve the constraints on dark energy parameters; (II) to check how they can help in disentangling peculiar intrinsic evolutionary supernovae features from cosmological (dark energy) ones.
(click here for the abstract)

Reference: Vincenzo Salzano, University of the Basque Country, Co-authors-Steven A. Rodney, Irene Sendra, Ruth Lazkoz, Adam G. Riess, Marc Postman, Tom Broadhurst, Dan Coe. 2013A&A.557A.64S

Salzano Fig6
Figure 6. 2013A&A.557A.64S