Projects per year
Personal profile
Research interests
I am post-doctoral research associate in the Department of Physics. As a high-energy astrophysicist, I study stellar explosions and their environment, focusing on the most energetic explosions in the Universe: γ-ray bursts. These events are some of the furthest observable phenomena in our Universe, shining brighter than the combined light from entire galaxies of a billion stars for a few minutes! We understand these bursts are formed in the deaths of massive stars and also in mergers involving neutron stars; however, the mechanism that releases their tremendous energy is not known. I am interested in learning why, when, and where these events occur, how they are related to other classes of explosions, and what they tell us about fundamental physics operating in regimes variously combining high energy, relativistic motion, dense plasmas, and strong gravity.
With the help of these incredibly powerful explosions, I study the nature of high-energy plasmas and relativistic shocks, physical conditions that are inaccessible in Earth-based laboratories. I also use these phenomenally powerful flashes to investigate the evolution of gas and the assembly of galaxies in the our Universe, back to the time of the formation of the first stars. To address these questions, I use ground- and space-based telescopes across the electromagnetic spectrum, combined with theoretical modeling in robust stastiscal frameworks.
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Projects
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Mapping emission and absorption line metallicities onto the same universal scale
Schady, P., Arabsalmani, M., Bowdery, W., Chen, H., Christensen, L., D'Elia, V., De Cia, A., De Pasquale, M., Easeman, B., Fruchter, A., Fynbo, J., Garcia-Benito, R., Gompertz, B., Graham, J., Greiner, J., Hartmann, D., Heintz, K., Jakobsson, P., Japelj, J., Konstantopoulou, C., Kouveliotou, C., Laskar, T., Levan, A., Malesani, D., Milvang-Jensen, B., Mundell, C., Palazzi, E., Perley, D., Piranomonte, S., Pugliese, G., Ramburuth-Hurt, T., Rossi, A., Salvaterra, R., Savaglio, S., Sbarufatti, B., Stanway, E., Starling, R., Tagliaferri, G., Tanvir, N., Thoene, C., Vergani, S., Watson, D., Wiersema, K., Wiseman, P., Yates, R. & de Ugarte Postigo, A.
1/05/22 → 30/04/23
Project: Other
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Probing the Nature of Gamma-ray Burst Jets with VISTA
Laskar, T., Schady, P., Van Eerten, H., Ayache, E. & Mundell, C.
1/04/20 → 30/09/20
Project: Other
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Probing the First Gamma-ray Bursts with Chandra (NASA/CXO 21200285)
Laskar, T., Van Eerten, H., Schady, P. & Mundell, C.
1/01/20 → 31/12/20
Project: Other
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Constraining the progenitors and environments of Gamma-ray Bursts with uGMRT
Laskar, T., Van Eerten, H., Schady, P., Mundell, C. & Ayache, E.
1/10/19 → 25/03/20
Project: Other
Research output
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Probing Kilonova Ejecta Properties Using a Catalog of Short Gamma-Ray Burst Observations
Rastinejad, J. C., Fong, W., Kilpatrick, C. D., Paterson, K., Tanvir, N. R., Levan, A. J., Metzger, B. D., Berger, E., Chornock, R., Cobb, B. E., Laskar, T., Milne, P., Nugent, A. E. & Smith, N., 8 Jan 2021, (Acceptance date) In: Astrophysical Journal.Research output: Contribution to journal › Article
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The Broad-band Counterpart of the Short GRB 200522A at $z=0.5536$: A Luminous Kilonova or a Collimated Outflow with a Reverse Shock?
Fong, W., Laskar, T., Rastinejad, J., Escorial, A. R., Schroeder, G., Barnes, J., Kilpatrick, C. D., Paterson, K., Berger, E., Metzger, B. D., Dong, Y., Nugent, A. E., Strausbaugh, R., Blanchard, P. K., Goyal, A., Cucchiara, A., Terreran, G., Alexander, K. D., Eftekhari, T., Fryer, C. & 3 others, , 10 Jan 2021, In: Astrophysical Journal. 906, 2, 127.Research output: Contribution to journal › Article › peer-review
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A late-time radio survey of short gamma-ray bursts at z < 0.5: New constraints on the remnants of neutron-star mergers
Schroeder, G., Margalit, B., Fong, W. F., Metzger, B. D., Williams, P. K. G., Paterson, K., Alexander, K. D., Laskar, T., Goyal, A. V. & Berger, E., 10 Oct 2020, In: Astrophysical Journal. 902, 1, 82.Research output: Contribution to journal › Review article › peer-review
Open Access6 Citations (Scopus) -
A Mildly Relativistic Outflow from the Energetic, Fast-rising Blue Optical Transient CSS161010 in a Dwarf Galaxy
Coppejans, D. L., Margutti, R., Terreran, G., Nayana, A. J., Coughlin, E. R., Laskar, T., Alexander, K. D., Bietenholz, M., Caprioli, D., Chandra, P., Drout, M. R., Frederiks, D., Frohmaier, C., Hurley, K. H., Kochanek, C. S., MacLeod, M., Meisner, A., Nugent, P. E., Ridnaia, A., Sand, D. J. & 18 others, , 20 May 2020, In: Astrophysical Journal Letters. 895, 1, L23.Research output: Contribution to journal › Article › peer-review
Open AccessFile9 Citations (Scopus)10 Downloads (Pure) -
Discovery of the Optical Afterglow and Host Galaxy of Short GRB 181123B at z = 1.754: Implications for Delay Time Distributions
Paterson, K., Fong, W., Nugent, A., Escorial, A. R., Leja, J., Laskar, T., Chornock, R., Miller, A. A., Scharw chter, J., Cenko, S. B., Perley, D., Tanvir, N. R., Levan, A., Cucchiara, A., Cobb, B. E., De, K., Berger, E., Terreran, G., Alexander, K. D., Nicholl, M. & 2 others, , 1 Aug 2020, In: Astrophysical Journal Letters. 898, 2, L32.Research output: Contribution to journal › Article › peer-review
Open Access3 Citations (Scopus)