Abstract
The Local Bubble is a large low-density region filled with hot gas that surrounds the Sun. The size of the cavity has been determined by absorption line and extinction measurements toward nearby stars and is found to be about 50–200 pc, extending in all directions from the Sun. The fact that the cavity is filled with hot gas has been shown by observations of the diffuse soft X-ray background, which is seen over the whole sky. While there has been substantial progress in understanding the nature of the Local Bubble, limitations in the spectral resolution of the X-ray observations and in models for the origins of the emission, as well as confusion with heliospheric X-ray emission, cause the details of the spatial distribution and ionization state of the hot gas to remain uncertain. Cooler nearby gas such as the Local Interstellar Cloud that surrounds the Solar System provides more clues to the state and origins of the bubble. It appears clear that the bubble was created by multiple supernovae and is now in fairly quiescent state. We review what is known about the bubble and models for its creation.
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References
Cox DP, Anderson PR (1982) Extended adiabatic blast waves and a model of the soft X-ray background. ApJ 253:268–289. doi:10.1086/159632
Cox DP, Smith BW (1974) Large-scale effects of supernova remnants on the galaxy: generation and maintenance of a hot network of tunnels. ApJL 189:L105. doi:10.1086/181476
Frisch PC, Redfield S, Slavin JD (2011) The interstellar medium surrounding the Sun. ARA&A 49:237–279. doi:10.1146/annurev-astro-081710-102613
Fuchs B, Breitschwerdt D, de Avillez MA, Dettbarn C, Flynn C (2006) The search for the origin of the local bubble redivivus. MNRAS 373:993–1003. doi:10.1111/j.1365-2966.2006.11044.x. astro-ph/0609227
Galeazzi M, Chiao M, Collier MR, Cravens T, Koutroumpa D, Kuntz KD, Lallement R, Lepri ST, McCammon D, Morgan K, Porter FS, Robertson IP, Snowden SL, Thomas NE, Uprety Y, Ursino E, Walsh BM (2014) The origin of the local 1/4-keV X-ray flux in both charge exchange and a hot bubble. Nature 512:171–173. doi:10.1038/nature13525. 1407.7539
Maíz-Apellániz J (2001) The origin of the local bubble. ApJL 560:L83–L86. doi:10.1086/324016. astro-ph/0108472
McCammon D, Burrows DN, Sanders WT, Kraushaar WL (1983) The soft X-ray diffuse background. ApJ 269:107–135. doi:10.1086/161024
McKee CF, Ostriker JP (1977) A theory of the interstellar medium – three components regulated by supernova explosions in an inhomogeneous substrate. ApJ 218:148–169. doi:10.1086/155667
Raymond JC, Smith BW (1977) Soft X-ray spectrum of a hot plasma. ApJS 35:419–439. doi:10.1086/190486
Redfield S, Linsky JL (2008) The structure of the local interstellar medium. IV. Dynamics, morphology, physical properties, and implications of cloud-cloud interactions. ApJ 673: 283–314. doi:10.1086/524002. 0804.1802
Slavin JD, Frisch PC (2008) The boundary conditions of the heliosphere: photoionization models constrained by interstellar and in situ data. A&A 491:53–68. doi:10.1051/0004-6361:20078101. 0704.0657
Smith RK, Cox DP (2001) Multiple supernova remnant models of the local bubble and the soft X-ray background. ApJS 134:283–309. doi:10.1086/320850
Smith RK, Foster AR, Edgar RJ, Brickhouse NS (2014) Resolving the origin of the diffuse soft X-ray background. ApJ 787:77. doi:10.1088/0004-637X/787/1/77. 1406.2037
Snowden SL, McCammon D, Verter F (1993) The X-ray shadow of the high-latitude molecular cloud MBM 12. ApJL 409:L21–L24. doi:10.1086/186850
Snowden SL, Egger R, Finkbeiner DP, Freyberg MJ, Plucinsky PP (1998) Progress on establishing the spatial distribution of material responsible for the 1/4 keV soft X-ray diffuse background local and halo components. ApJ 493:715–729. doi:10.1086/305135
Welsh BY, Lallement R, Vergely JL, Raimond S (2010) New 3D gas density maps of NaI and CaII interstellar absorption within 300 pc. A&A 510:A54. doi:10.1051/0004-6361/200913202. 0912.3040
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This work has been supported by NASA Astrophysics Theory Program grant no. NNX15AI60G.
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Slavin, J.D. (2017). Structures in the Interstellar Medium Caused by Supernovae: The Local Bubble. In: Alsabti, A., Murdin, P. (eds) Handbook of Supernovae. Springer, Cham. https://doi.org/10.1007/978-3-319-21846-5_14
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DOI: https://doi.org/10.1007/978-3-319-21846-5_14
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