What fills the space between the partially ionized clouds in the local interstellar medium

13th Annual International Astrophysics Conference: Voyager, IBEX, and the Interstellar Medium

物理学;天文学

Linsky, Jeffrey^1 ; Redfield, Seth^2

JILA, University of Colorado, NIST, Boulder

CO

80309-0440, United States^1

Wesleyan University, Middletown

CT

06459-0001, United States^2

关键词: Inter clouds;    Interstellar matter;    Lines-of-sight;    Local interstellar clouds;    Local interstellar medium;    Space between;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/577/1/012017/pdf
DOI  :  10.1088/1742-6596/577/1/012017

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The interstellar matter located between the warm clouds in the LISM and in the Local Cavity is now thought to be photoionized gas with temperatures in the range 10,000-20,000 K. While the hot stars CMa and β CMa are the primary photoionizing sources in the LISM, hot white dwarfs also contribute. We consider whether the Stromgren sphere gas produced by very local hot white dwarfs like Sirius B can be important in explaining the local intercloud gas. We find that the Stromgren sphere of Sirius can at least partially explain the intercloud gas in the lines of sight to several nearby stars. We also suggest that the partially ionized warm clouds like the Local Interstellar Cloud in which the Sun is located may be in part Strömgren sphere shells.