Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/3296
Title: Physical conditions in high­z CIII absorbers: origin and stability
Authors: Mohapatra, Abhisek
Srianand, R
Khaire, Vikram
Pradhan, Ananta C
Keywords: High­z CIII absorbers
Origin and stability
Issue Date: Jun-2019
Citation: Cosmic Explosions 2019, Cargèse, France, 27 May- 5 June 2019
Abstract: In this talk, I will present detailed photoionization models of well-aligned optically thin doubly ionized carbon (C III) absorption components at 2.1 ≤ z ≤ 3.4. Our inferred density and overdensity (Δ) favor the absorption originating from gas associated with circumgalactic medium and probably not in hydrostatic equilibrium. We discuss statistically significant redshift evolution of our derived parameters. We show L vs. [C/H] can be well reproduced if L is governed by the product of gas cooling time and sound crossing speed as expected in the case of cloud formation under thermal instabilities. As noted in the literature survivability of such cloud over longer time-scale is an issue. Therefore, studying the optically thin C III absorbers over a large z range and probably correlating their z evolution with global star formation rate density evolution can shed light to the physics of circumgalactic medium formation and evolution.
Description: Copyright of this document belongs to proceedings publisher.
URI: http://hdl.handle.net/2080/3296
Appears in Collections:Conference Papers

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