A5108029523- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
University of Portsmouth
2018-2019
We analyse publicly available, individual spectra of four, massive ($M>10^{11}M_{\odot}$) early-type galaxies with redshifts in the range 1.4 < z 2 to determine their stellar content, extending our previous work up z~2. The wide wavelength VLT/X-Shooter spectroscopic data UV-Optical-NIR arms along availability spectro-photometry allows us explore different techniques obtain population properties, namely through age/metallicity sensitive spectral indices, full fitting and broad-band...
Using stellar population models, we predicted that the Dark Energy Survey (DES) - due to its special combination of area (5000 deg. sq.) and depth ($i = 24.3$) would be in position detect massive ($\gtrsim 10^{11}$ M$_{\odot}$) galaxies at $z \sim 4$. We confront those theoretical calculations with first $\sim 150$ sq. DES data reaching nominal depth. From a catalogue containing 5$ million sources, $\sim26000$ were found have observed-frame $g-r$ vs $r-i$ colours within locus for 4$...
We present images taken using the Gemini South Adaptive Optics Imager (GSAOI) with Multiconjugate System (GeMS) in three 2 arcmin$^2$ fields Spitzer Extragalactic Representative Volume Survey. These GeMS/GSAOI observations are among first $\approx 0.1^{''}$ resolution data near-infrared spanning extragalactic exceeding $1.5^{\prime}$ size. use these to estimate galaxy sizes, obtaining results similar those from studies Hubble Space Telescope, though we find a higher fraction of compact star...