University of Connecticut

Events Calendar

Astronomy Seminar

Wednesday, November 4, 2020
10:00am – 11:00am

Storrs Campus

Mohammad Akhshik, Department of Physics, University of Connecticut

REQUIEM-2D: REsolving QUIEscent Magnified galaxies using strong gravitational lensing, 2D grism spectroscopy and multi-band photometry

Despite the tremendous progress that has been made in the last decade in studying massive high redshift (z~2) quiescent galaxies, their formation pathways and quenching mechanisms have not yet been established observationally. In my talk, I will review the REQUIEM^2D galaxy survey of eight strong lensed quiescent galaxies at z=1.6-2.9, our attempt to understand the formation scenarios of quiescent galaxies by analyzing the spatially resolved stellar populations with deep HST grism spectroscopy. After briefly reviewing our methodology, I will discuss the results from our REQUIEM^2D pilot target, MRG-S0851, a gravitationally lensed quintuply imaged massive compact red galaxy at z=1.9. Using our recovered ages and SFHs from the joint spectrophotometric analysis, along with trajectories in the UVJ and FUVVJ color-color diagrams, I show that MRG-S0851 is consistent with an early forming, slow quenched galaxy that is going through a centrally-concentrated rejuvenation phase.

Dr. Daniel Walker, Department of Physics, University of Connecticut

Uncovering the hidden star formation in the Milky Way's Central Molecular Zone

As our nearest "extreme environment", the Central Molecular Zone (CMZ, inner few hundred parsecs of our Galaxy) offers an ideal laboratory in which to study the extent to which the process of star formation is sensitive to differing environmental conditions. At a distance of just 8.1 kpc, we can study this process from Galactic scales all the way down to protostellar scales, something that is not possible in extragalactic analogues. In this talk, I will give an overview of our current understanding of star formation in this region of the Galaxy. I will then present some results from recent and ongoing projects that are transforming our view of the CMZ, and providing insight into key questions concerning the role of galactic environment in the star formation process.

Meeting Link:


Prof. C. Battersby

Physics Department (primary), College of Liberal Arts and Sciences, UConn Master Calendar

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