Department of Physics & Astronomony
- Observational Astronomy
My main research interest is focused on the study of formation and evolution of galaxies using multi-waveband galaxy surveys obtained with 8-10 meter ground-based telescopes (Gemini, VLT, Subaru, Keck) and space facilities (HST, Spitzer, GALEX, Chandra). Using the observational data and stellar synthesis models, I study properties of galaxies as a function of star formation rate, morphology, environment, color, luminosity and redshift. Over the past two years I have been involved in the following studies: developing the Balmer Break technique for identifying very high redshift massive galaxies, using the combined HST and Spitzer data; discovery of an extremely massive and evolved galaxy at z ~ 7 (this has been the subject of extensive press release); study of the density-morphology relation over the largest dynamic range in density, and its evolution with redshift; planning and execution of the new Hubble Ultra Deep Field (HUDF), doubling the area and increasing the depth of the original HUDF; finding candidates for galaxies at z ~ 8 through searches for J-band dropouts in the new HUDF; study of the properties (SFR, mass, extinction) of high redshift galaxies selected through narrow-band Lyman emission (LAE) at z = 5.7 and comparison with Lyman Break Galaxies at the same redshift; developing a photometric redshift code to calculate redshift, spectral types and stellar masses of galaxies. I have been seriously involved in the Great Observatories Origins Deep Survey (GOODS) and The Cosmic Evolution Survey (COSMOS) projects. I have also been leading parts of the new HST treasury project to survey the core and outskirt of the Coma cluster.
Ph.D. 1988, University of Durham, Durham, U.K.
- Mobasher, B.; Jogee, S.; Dahlen, T.; De Mallo, D.; Lucas, R.A.; Conselice, C.; Grogin, N.; Livio, M., Structure and Evolution of Starburst and Normal Galaxies, Ap. J. 2004, 600, 143.
- Mobasher, B., et al., Photometric Redshifts to Galaxies in the Southern GOODS Field, Ap. J. 2004, 600, 167.
- Riess, A.G., Strolger, L., Tonry, J., Casertano, S., Ferguson, H.C., Mobasher, B., Challis, P., Fillipenko, A.V., Saurabh, J., et al., Type Ia Supernovae Discoveries at z > 1 from the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark-Energy Evolution, Ap. J. 2004, 607, 665. (Ranked as the second most cited paper in astrophysics in 2005).
- Dahlen, T., Strolger, L., Riess, A.G., Mobasher, R, Chary, R., et al., High Redshift Supernovae Rates, Ap. J. 2004, 613, 189.
- Dahlen, T., Mobasher, B., Dickinson, M., Ferguson, H., and Giavalisco, M., Evolution of Rest-Frame Optical and Near-Infrared Galaxy Luminosity Functions and Their Type-Dependence, Ap. J. 2005, 631, 126.
- Mobasher, B., et al., Evidence for a Massive Post-Starburst Galaxy at z ~ 6.5, Ap. J 2005, 635, 832. (This was ranked among the top 100 most outstanding science results in 2005, selected by the Science News and Discover magazines).
- Panagia, N., Fall, M., Mobasher, B., Dickinson, M., Ferguson, R., Giavalisco, M., and Wiklind, T., Direct Evidence for an Early Reionization of the Universe?, Ap. J. Lett., 2005, 633, 1.
- Ajiki, M., Mobasher, B., Taniguchi, Y., Shioya, Y. et al., Narrow-band Survey of the GOODS Fields: Search for Lyman α Emitters at z = 5.7, Ap.J. 2006, 638, 596.
- Capak, P., Abraham, R., Ellis, R.S., Mobasher, B., Scoville, N.Z., Sheth, K., The Effects of Environment on Morphological Evolution at 0 < z < 1.2 in the COSMOS Survey, Ap. J. Suppl. 2007, 172, 284.