Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Khaire, Vikram"'
Autor:
Khonde, Dheerajkumar, Udhwani, Purvi, Narayanan, Anand, Muzahid, Sowgat, Khaire, Vikram, Wendt, Martin
We report on the analysis of a multiphase Lyman limit system (LLS) at $z=0.39047$ identified towards the background quasar FBQS J0209-0438. The O VI doublet lines associated with this absorber have a different profile from the low ionization metals a
Externí odkaz:
http://arxiv.org/abs/2409.01645
Autor:
Lokaveer, A, Anjana, Thomas, Yasir, Maliyekkal, Yogahariharan, S, Dewangan, Akash, Mahajan, Saurabh Kishor, Tembhurne, Sakshi Aravind, Gupta, Gunja Subhash, Bhalla, Devashish, Dhruva, Anantha Datta, Kumar, Aloke, Viswanathan, Koushik, Khaire, Vikram, Narayanan, Anand, Hari, Priyadarshnam
The SSPACE Astrobiology Payload (SAP) series, starting with the SAP-1 project is designed to conduct in-situ microbiology experiments in low earth orbit. This payload series aims to understand the behaviour of microbial organisms in space, particular
Externí odkaz:
http://arxiv.org/abs/2407.21183
Autor:
Bhowmick, Ushasi, Khaire, Vikram
We present a versatile transit simulator aimed at generating light curves for arbitrarily shaped objects transiting stars. Utilizing a Monte Carlo algorithm, it accurately models the stellar flux blocked by these objects, producing precise light curv
Externí odkaz:
http://arxiv.org/abs/2406.17259
We introduce FLAME, a machine-learning algorithm designed to fit Voigt profiles to HI Lyman-alpha (Ly$\alpha$) absorption lines using deep convolutional neural networks. FLAME integrates two algorithms: the first determines the number of components r
Externí odkaz:
http://arxiv.org/abs/2403.07498
Autor:
Hu, Teng, Khaire, Vikram, Hennawi, Joseph F., Tripp, Todd M., Oñorbe, Jose, Walther, Michael, Lukic, Zarija
We perform the first measurement of the thermal and ionization state of the intergalactic medium (IGM) across 0.9 < z < 1.5 using 301 \lya absorption lines fitted from 12 HST STIS quasar spectra, with a total pathlength of \Delta z=2.1. We employ the
Externí odkaz:
http://arxiv.org/abs/2311.17895
Autor:
Khaire, Vikram, Hu, Teng, Hennawi, Joseph F., Burchett, Joseph N., Walther, Michael, Davies, Frederick
We explore the potential of using the low-redshift Lyman-$\alpha$ (Ly$\alpha$) forest surrounding luminous red galaxies (LRGs) as a tool to constrain active galactic nuclei (AGN) feedback models. Our analysis is based on snapshots from the Illustris
Externí odkaz:
http://arxiv.org/abs/2311.08470
Autor:
Hu, Teng, Khaire, Vikram, Hennawi, Joseph F., Onorbe, Jose, Walther, Michael, Lukic, Zarija, Davies, Frederick
At $z \lesssim 1$, shock heating caused by large-scale velocity flows and possibly violent feedback from galaxy formation, converts a significant fraction of the cool gas ($T\sim 10^4$ K) in the intergalactic medium (IGM) into warm-hot phase (WHIM) w
Externí odkaz:
http://arxiv.org/abs/2308.14738
We investigate the potential of low-redshift Lyman alpha (Ly$\alpha$) forest for constraining active galactic nuclei (AGN) feedback models by analyzing the Illustris and IllustrisTNG simulation at z=0.1. These simulations are ideal for studying the i
Externí odkaz:
http://arxiv.org/abs/2306.05466
Autor:
Hu, Teng, Khaire, Vikram, Hennawi, Joseph F., Walther, Michael, Hiss, Hector, Alsing, Justin, Oñorbe, Jose, Lukic, Zarija, Davies, Frederick
We present a new approach to measure the power-law temperature density relationship $T=T_0 (\rho / \bar{\rho})^{\gamma -1}$ and the UV background photoionization rate $\Gamma_{\rm HI}$ of the IGM based on the Voigt profile decomposition of the Ly$\al
Externí odkaz:
http://arxiv.org/abs/2207.07151
Autor:
Acharya, Anshuman, Khaire, Vikram
Publikováno v:
MNRAS 509, 4 (2022)
Quantitative estimates of the basic properties of the circumgalactic medium(CGM), such as its density and metallicity, depend on the spectrum of incident UV background radiation. Models of UV background are known to have large variations, mainly beca
Externí odkaz:
http://arxiv.org/abs/2104.01182