Tanveer Karim

Tanveer Karim

Dunlap Postdoctoral Fellow, University of Toronto. Observational cosmologist.

Publications

Measuring σ8 using DESI Legacy Imaging Surveys Emission-Line Galaxies and Planck CMB Lensing and the Impact of Dust on Parameter Inference Permalink

Published in Journal of Cosmology and Astroparticle Physics, 2025

First-author measurement of the growth of structure (σ8) from the cross-correlation of ~20 million DESI Legacy Imaging Emission-Line Galaxies with Planck CMB lensing, showing that the choice of Galactic dust correction model materially shifts the inferred cosmological parameters.

Recommended citation: Tanveer Karim, et al. "Measuring σ8 using DESI Legacy Imaging Surveys Emission-Line Galaxies and Planck CMB Lensing and the Impact of Dust on Parameter Inference." Journal of Cosmology and Astroparticle Physics, 02, 045 (2025).

On the impact of the galaxy window function on cosmological parameter estimation Permalink

Published in Monthly Notices of the Royal Astronomical Society, 2023

This paper identifies a new source of observational systematics in large-scale structure survey analysis stemming from the bias in measuring imaging systematics weights. This paper is the second chapter of my Ph.D. dissertation.

Recommended citation: Tanveer Karim, Mehdi Rezaie, Sukhdeep Singh, Daniel Eisenstein, "On the impact of the galaxy window function on cosmological parameter estimation." Monthly Notices of the Royal Astronomical Society, 2023.

Target Selection and Validation of DESI Emission Line Galaxies Permalink

Published in Astronomical Journal, 2023

This paper describes the official DESI ELG target selection algorithm. This is the third and the final DESI ELG target selection related paper in a series of ELG target selection related papers.

Recommended citation: A. Raichoor, J. Moustakas, Jeffrey Newman, T. Karim, et al. "Target Selection and Validation of DESI Emission Line Galaxies." Astronomical Journal, 2023.

Diverse metallicities of Fermi bubble clouds indicate dual origins in the disk and halo Permalink

Published in Nature Astronomy, 2022

This paper showcases the diversity of metallicity and possibly the heterogeneity of the origins of high-velocity clouds in and around the Fermi Bubbles. This paper is a part of a series of papers trying to understand the Fermi Bubbles using halo high-velocity clouds as tracers.

Recommended citation: Trisha Ashley, Andrew Fox, Frances Cashman, Felix Lockman, et al. "Diverse metallicities of Fermi bubble clouds indicate dual origins in the disk and halo." Nature Astronomy, 2022. https://arxiv.org/pdf/2207.08838.pdf

Preliminary Target Selection for the DESI Emission Line Galaxy (ELG) Sample Permalink

Published in Research Notes of the American Astronomical Society, 2020

This paper describes the preliminary ELG target selection used in the DESI Survey Validation phase, and served as the precursor to the final target selection. This is the second DESI ELG target selection related paper in a series of ELG target selection related papers.

Recommended citation: Anand Raichoor, Daniel Eisenstein, Tanveer Karim, Jeffrey Newman, et al. "Preliminary Target Selection for the DESI Emission Line Galaxy (ELG) Sample." Research Notes of the American Astronomical Society, 2020.

Validation of emission-line galaxies target selection algorithms for the Dark Energy Spectroscopic Instrument using the MMT Binospec Permalink

Published in Monthly Notices of the Royal Astronomical Society, 2020

This is the first chapter of my Ph.D. dissertation and compares different target selection algorithms for DESI ELGs. This is the first DESI ELG target selection related paper in a series of ELG target selection related papers.

Recommended citation: Tanveer Karim, Jae Lee, Daniel Eisenstein, Etienne Burtin, et al. "Validation of emission-line galaxies target selection algorithms for the Dark Energy Spectroscopic Instrument using the MMT Binospec." Monthly Notices of the Royal Astronomical Society, 2020.

Mapping Outflowing Gas in the Fermi Bubbles: A UV Absorption Survey of the Galactic Nuclear Wind

Published in Astrophysical Journal, 2020

This paper paints one of the first comprehensive pictures of the high-velocity clouds population in the Fermi Bubbles using UV absorption spectroscopy. This paper is a part of a series of papers trying to understand the Fermi Bubbles using halo high-velocity clouds as tracers.

Recommended citation: Trisha Ashley, Andrew Fox, Edward Jenkins, Bart Wakker, et al. "Mapping Outflowing Gas in the Fermi Bubbles: A UV Absorption Survey of the Galactic Nuclear Wind." Astrophysical Journal, 2020.

Probing the Southern Fermi Bubble in Ultraviolet Absorption Using Distant AGNs Permalink

Published in Astrophysical Journal, 2018

This paper is the first paper to discuss the kinematics and chemistry of high-velocity clouds inside and around the Southern Fermi Bubble region in the Milky Way. This paper is a part of a series of papers trying to understand the Fermi Bubbles using halo high-velocity clouds as tracers.

Recommended citation: Tanveer Karim, Andrew Fox, Edward Jenkins, Rongmon Bordoloi, et al. "Probing the Southern Fermi Bubble in Ultraviolet Absorption Using Distant AGNs." Astrophysical Journal, 2018.

Revised geometric estimates of the North Galactic Pole and the Sun's height above the Galactic mid-plane Permalink

Published in Monthly Notices of the Royal Astronomical Society, 2017

This paper includes one of the most comprehensive studies of the Solar height and the inferred value of 17 ± 2 parsec is widely cited and accepted in the field.

Recommended citation: T. Karim and Eric Mamajek, "Revised geometric estimates of the North Galactic Pole and the Sun's height above the Galactic mid-plane." mnras, 2017.

The Rotation Period Distributions of 4-10 Myr T Tauri Stars in Orion OB1: New Constraints on Pre-main-sequence Angular Momentum Evolution Permalink

Published in Astronomical Journal, 2016

This paper includes a catalog of 564 T Tauri stars and their measured rotation periods.

Recommended citation: Tanveer Karim, Keivan Stassun, César Briceño, A.Vivas, et al. "The Rotation Period Distributions of 4-10 Myr T Tauri Stars in Orion OB1: New Constraints on Pre-main-sequence Angular Momentum Evolution." Astronomical Journal, 2016.