74 citations · 430 across the 13 of their papers we have counts for
13 papers
REQUIEM-2D: A diversity of formation pathways in a sample of spatially-resolved massive quiescent galaxies at z~2
Mohammad Akhshik, Katherine E. Whitaker, Joel Leja +16
REQUIEM-2D (REsolving QUIEscent Magnified galaxies with 2D grism spectroscopy) is comprised of a sample of 8 massive () strongly lensed quiescent galaxies…
Diagnosing DASH: A Catalog of Structural Properties for the COSMOS-DASH Survey
Sam E. Cutler, Katherine E. Whitaker, Lamiya A. Mowla +16
We present the morphological catalogs for the COSMOS-DASH survey, the largest area near-IR survey using HST-WFC3 to date. Utilizing the "Drift And SHift" observing techni…
High Molecular-Gas to Dust Mass Ratios Predicted in Most Quiescent Galaxies
Katherine E. Whitaker, Desika Narayanan, Christina C. Williams +15
Observations of cold molecular gas reservoirs are critical for understanding the shutdown of star formation in massive galaxies. While dust continuum is an efficient and affordable…
Quenching of star formation from a lack of inflowing gas to galaxies
Katherine E. Whitaker, Christina C. Williams, Lamiya Mowla +16
Star formation in half of massive galaxies was quenched by the time the Universe was three billion years old. Very low amounts of molecular gas appear responsible for this, at leas…
A Gravitationally Lensed Supernova with an Observable Two-Decade Time Delay
Steven A. Rodney, Gabriel B. Brammer, Justin D. R. Pierel +5
When the light from a distant object passes very near to a foreground galaxy or cluster, gravitational lensing can cause it to appear as multiple images on the sky. If the source i…
Early Science with the Large Millimeter Telescope: Constraining the Gas Fraction of a Compact Quiescent Galaxy at z=1.883
Joyce N. Caliendo, Katherine E. Whitaker, Mohammad Akhshik +14
We present constraints on the dust continuum flux and inferred gas content of a gravitationally lensed massive quiescent galaxy at =1.8830.001 using AzTEC 1.1mm imaging wit…
Recent Star-formation in a Massive Slowly-Quenched Lensed Quiescent Galaxy at z=1.88
Mohammad Akhshik, Katherine E. Whitaker, Joel Leja +10
In this letter, we reconstruct the formation pathway of MRG-S0851, a massive, , strongly lensed, red, galaxy at . While the global p…
REQUIEM-2D: Spatially Resolved Stellar Populations from HST 2D Grism Spectroscopy
Mohammad Akhshik, Katherine E. Whitaker, Gabriel Brammer +13
We present a novel Bayesian methodology to jointly model photometry and deep Hubble Space Telescope (HST) 2d grism spectroscopy of high-redshift galaxies. Our requiem2d code measur…
Strong Lens Models for 37 Clusters of Galaxies from the SDSS Giant Arcs Survey
Keren Sharon, Matthew B. Bayliss, Håkon Dahle +12
We present strong gravitational lensing models for 37 galaxy clusters from the SDSS Giant Arcs Survey. We combine data from multi-band Hubble Space Telescope WFC3imaging, with grou…
Primordial Statistical Anisotropies: The Effective Field Theory Approach
Ali Akbar Abolhasani, Mohammad Akhshik, Razieh Emami +1
In this work we present the effective field theory of primordial statistical anisotropies generated during anisotropic inflation involving a background gauge field. Besides…
Effective Field Theory of non-Attractor Inflation
Mohammad Akhshik, Hassan Firouzjahi, Sadra Jazayeri
We present the model-independent studies of non attractor inflation in the context of effective field theory (EFT) of inflation. Within the EFT approach two independent branches of…
Clustering Fossils in Solid Inflation
Mohammad Akhshik
In solid inflation the single field non-Gaussianity consistency condition is violated. As a result, the long tensor perturbation induces observable clustering fossils in the form o…
Statistical Anisotropies in Gravitational Waves in Solid Inflation
Mohammad Akhshik, Razieh Emami, Hassan Firouzjahi +1
Solid inflation can support a long period of anisotropic inflation. We calculate the statistical anisotropies in the scalar and tensor power spectra and their cross-correlation in…