Weighing the Local Interstellar Medium Using Gamma Rays and Dust
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Weighing the Local Interstellar Medium Using Gamma Rays and Dust. / Widmark, Axel; Korsmeier, Michael; Linden, Tim.
In: Physical Review Letters, Vol. 13, No. 16, 161002, 2023.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Weighing the Local Interstellar Medium Using Gamma Rays and Dust
AU - Widmark, Axel
AU - Korsmeier, Michael
AU - Linden, Tim
N1 - Publisher Copyright: © 2023 American Physical Society.
PY - 2023
Y1 - 2023
N2 - Cold gas forms a significant mass fraction of the Milky Way disk, but is its most uncertain baryonic component. The density and distribution of cold gas is of critical importance for Milky Way dynamics, as well as models of stellar and galactic evolution. Previous studies have used correlations between gas and dust to obtain high-resolution measurements of cold gas, but with large normalization uncertainties. We present a novel approach that uses Fermi-LAT γ-ray data to measure the total gas density, achieving a similar precision as previous works, but with independent systematic uncertainties. Notably, our results have sufficient precision to probe the range of results obtained by current world-leading experiments.
AB - Cold gas forms a significant mass fraction of the Milky Way disk, but is its most uncertain baryonic component. The density and distribution of cold gas is of critical importance for Milky Way dynamics, as well as models of stellar and galactic evolution. Previous studies have used correlations between gas and dust to obtain high-resolution measurements of cold gas, but with large normalization uncertainties. We present a novel approach that uses Fermi-LAT γ-ray data to measure the total gas density, achieving a similar precision as previous works, but with independent systematic uncertainties. Notably, our results have sufficient precision to probe the range of results obtained by current world-leading experiments.
U2 - 10.1103/PhysRevLett.130.161002
DO - 10.1103/PhysRevLett.130.161002
M3 - Journal article
C2 - 37154658
AN - SCOPUS:85153877679
VL - 13
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 16
M1 - 161002
ER -
ID: 372821526