how ubiquitous is the hot component? · anjali gupta columbus state community college email:...
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How Ubiquitous Is the Hot Component?
Anjali GuptaColumbus State Community College
Email: [email protected]
Collaborators Joshua Kingsbury
Smita MathurSanskriti DasYair Krongold
Image Credit: European Space Agency (ESA)/XMM-Newton/Das et al 2019
Image Credit: Ann Finkbeiner 2012, Nature, 490, 7418
The Milky Way’s Warm-Hot Gas Halo
Temperature ≈ 2 Million Kelvins
Radius > 140 Kiloparsecs
Mass > 60 Billion Suns
Image Credit: European Space Agency (ESA)/XMM-Newton/Das et al 2019
Discovery of Scorching Hot Gas in Milky Way’s halo
Temperatures: ≈ 1 – 10 Million Kelvins
Das et al. 2019a, ApJL, 882L, 23 Das et al. 2019b, ApJ, 887, 257
How Ubiquitous Is the Hot Component?
Sight line of 1ES1553+113 from Das et al.
Suzaku and Chandra Sight lines, new results
Suzaku Mission(2005-2015)
Japan’s X-ray Astronomy Mission
Hard X-ray Energy Range: 10 – 700 keV
Soft X-ray Energy range: 0.3 – 12.0 keV
Chandra Mission(1999-Present)
USA’S X-ray Astronomy Mission
Soft X-ray Energy range: 0.2 – 10.0 keV
Solar NeighborhoodGalactic Absorbing Disk
Cosmic X-ray Background
Milky-Way Galactic Halo
Figure Not Drawn to Scale
Soft Diffuse X-ray Background
Temperature ≈ 2 ꓫ 106 Kelvin
Galactic EmissionExtragalactic
Emission
Suzaku Spectrum
} Local emission} Warm-Hot Component
Hot Component
Solar NeighborhoodGalactic Absorbing Disk
Cosmic X-ray Background
Milky-Way Galactic Halo
Figure Not Drawn to Scale
Soft Diffuse X-ray Background
T warm-hot = (2.0 ± 0.1) ꓫ 106 Kelvin
T hot = (8.7 ± 0.8) ꓫ 106 Kelvin
How Ubiquitous Is the Hot Component?
Suzaku’s Detection of Milky Way’s Halo Hot Gas
Hot Component Temperature8.7±0.8 Million Kelvin
Results
• Recent discovery of hot component of theMilky Way’s halo is not unique
• Hot component of the Milky Way halo gas ismore ubiquitous
Anjali GuptaEmail: [email protected]