THE STRUCTURE of the LOCAL HOT BUBBLE

W. Liu, M. Chiao, M. R. Collier, T. Cravens, M. Galeazzi, D. Koutroumpa, K. D. Kuntz, R. Lallement, S. T. Lepri, D. McCammon, K. Morgan, F. S. Porter, S. L. Snowden, N. E. Thomas, Y. Uprety, E. Ursino, B. M. Walsh

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Diffuse X-rays from the Local Galaxy (DXL) is a sounding rocket mission designed to quantify and characterize the contribution of Solar Wind Charge eXchange (SWCX) to the Diffuse X-ray Background and study the properties of the Local Hot Bubble (LHB). Based on the results from the DXL mission, we quantified and removed the contribution of SWCX to the diffuse X-ray background measured by the ROSAT All Sky Survey. The "cleaned" maps were used to investigate the physical properties of the LHB. Assuming thermal ionization equilibrium, we measured a highly uniform temperature distributed around kT =0.097 keV ±0.013 keV (FWHM) ±0.006 keV (systematic). We also generated a thermal emission measure map and used it to characterize the three-dimensional (3D) structure of the LHB, which we found to be in good agreement with the structure of the local cavity measured from dust and gas.

Original languageEnglish (US)
Article number33
JournalAstrophysical Journal
Volume834
Issue number1
DOIs
StatePublished - Jan 1 2017

Keywords

  • ISM: bubbles
  • ISM: structure
  • X-rays: ISM
  • X-rays: diffuse background

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Liu, W., Chiao, M., Collier, M. R., Cravens, T., Galeazzi, M., Koutroumpa, D., Kuntz, K. D., Lallement, R., Lepri, S. T., McCammon, D., Morgan, K., Porter, F. S., Snowden, S. L., Thomas, N. E., Uprety, Y., Ursino, E., & Walsh, B. M. (2017). THE STRUCTURE of the LOCAL HOT BUBBLE. Astrophysical Journal, 834(1), [33]. https://doi.org/10.3847/1538-4357/834/1/33