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The solar wind (SW) and local interstellar medium (LISM) are turbulent media. Their interaction is governed by complex physical processes and creates heliospheric regions with significantly different properties in terms of particle…

The Sun is moving through a warm ($\sim$6500 K) and partly ionized local interstellar cloud (LIC) with a velocity of $\sim$26 km/s. Recent measurements of the ionization of the LIC (Wolff et al., 1999) suggest that interstellar helium in…

Astrophysics · Physics 2009-11-10 Vlad Izmodenov , Yury G. Malama , George Gloeckler , Johannes Geiss

We present a new 3d self-consistent two-component (plasma and neutral hydrogen) model of the solar wind interaction with the local interstellar medium (LISM). This model (K-MHD) combines the MHD treatment of the solar wind and the ionized…

Solar and Stellar Astrophysics · Physics 2015-05-27 Fathallah Alouani-Bibi , Merav Opher , Dimitry Alexashov , Vladislav Izmodenov , Gabor Toth

A good understanding of the ionization rates of neutral species in the heliosphere is important for studies of the heliosphere and planetary atmospheres. So far, the intensities of the ionization reactions have been studied based on…

Solar and Stellar Astrophysics · Physics 2023-03-15 M. Bzowski , M. A. Kubiak , E. Moebius , N. A. Schwadron

The interstellar cloud surrounding the solar system regulates the galactic environment of the Sun, and determines the boundary conditions of the heliosphere. Both the Sun and interstellar clouds move through space, so these boundary…

Astrophysics · Physics 2009-10-30 Priscilla C. Frisch

The low density interstellar medium (ISM) close to the Sun and inside of the heliosphere provides a unique laboratory for studying interstellar dust grains. Grain characteristics in the nearby ISM are obtained from observations of…

Astrophysics of Galaxies · Physics 2015-06-05 Priscilla C. Frisch , Jonathan D. Slavin

In this paper, we perform numerical modeling of the interstellar hydrogen fluxes measured by IBEX-Lo during orbit 23 (spring 2009) using a state-of-the-art kinetic model of the interstellar neutral hydrogen distribution in the heliosphere.…

Solar and Stellar Astrophysics · Physics 2015-10-28 O. A. Katushkina , V. V. Izmodenov , D. B. Alexashov , N. A. Schwadron , D. J. McComas

Investigating the bubbles generated by the interaction between asymptotic giant branch stellar outflows and the interstellar medium (ISM) is pivotal for elucidating the mechanism by which evolved low- to intermediate-mass stars enrich the…

Solar and Stellar Astrophysics · Physics 2025-09-30 Jun-Yang Liu , Yong Zhang , Xu-Jia Ouyang

Interstellar neutral hydrogen flows into the heliosphere as a mixture of the primary and secondary populations from two somewhat different directions due to splitting occurring in the magnetized outer heliosheath. The direction of inflow of…

Solar and Stellar Astrophysics · Physics 2023-12-12 M. Bzowski , M. A. Kubiak , M. Strumik , I. Kowalska-Leszczynska , C. Porowski , E. Quemerais

In situ measurements of the heliospheric particle populations by the Voyager spacecraft can only be put in an appropriate context with remote-sensing observations of energetic and interstellar neutral atoms (ENAs and ISN, respectively) at 1…

Solar and Stellar Astrophysics · Physics 2020-08-25 M. Bzowski , M. A. Kubiak

The heliosphere is formed due to interaction between the solar wind (SW) and local interstellar medium (LISM). The shape and position of the heliospheric boundary, the heliopause, in space depend on the parameters of interacting plasma…

Solar and Stellar Astrophysics · Physics 2017-08-16 N. V. Pogorelov , J. Heerikhuisen , V. Roytershteyn , L. F. Burlaga , D. A. Gurnett , W. S. Kurth

In the early 1990s, contemporary interstellar dust (ISD) penetrating deep into the heliosphere was identified with the in-situ dust detector on board the Ulysses spacecraft. Between 1992 and the end of 2007 Ulysses monitored the ISD stream.…

Earth and Planetary Astrophysics · Physics 2015-10-22 Harald Krüger , Peter Strub , Eberhard Gruen , Veerle J. Sterken

Modeling of the global heliosphere seeks to investigate the interaction of the solar wind with the partially ionized local interstellar medium. Models that treat neutral hydrogen self-consistently and in great detail, together with the…

The physical conditions within our heliosphere are driven by the Sun's motion through an evolving interstellar environment that remains largely unexplored. The next generation of outer heliosphere and interstellar explorers will answer…

Galactic HI (neutral hydrogen) shells are central to our understanding of the interstellar medium (ISM), which plays a key role in the development and evolution of galaxies, including our own. Several models involving supernovae and stellar…

Astrophysics of Galaxies · Physics 2016-06-30 Shauna M. Sallmen , Eric J. Korpela , Brooke Bellehumeur , Elizabeth M. Tennyson , Kurt Grunwald , Cheuk Man Lo

We present FUSE observations of the interstellar gas toward 30 white dwarf and 1 subdwarf (SdO) stars. These sightlines probe the Local Bubble (LB) and the local interstellar medium (LISM) near the LB. Our survey detected only diffuse H_2…

Astrophysics · Physics 2008-11-26 N. Lehner , E. B. Jenkins , C. Gry , H. W. Moos , P. Chayer , S. Lacour

Radiative processes play a pivotal role in shaping the thermal and chemical states of gas across diverse astrophysical environments, from the interstellar medium (ISM) to the intergalactic medium. We present a hybrid cooling model for…

Ionized carbon is the main gas-phase reservoir of carbon in the neutral diffuse interstellar medium and its 158 micron fine structure transition [CII] is the most important cooling line of the diffuse interstellar medium (ISM). We combine…

Searches for helium in the exospheres of exoplanets via the metastable near-infrared triplet have yielded 17 detections and 40 non-detections. We performed a comprehensive re-analysis of published studies to investigate the influence of…

Earth and Planetary Astrophysics · Physics 2024-06-26 Vigneshwaran Krishnamurthy , Nicolas B. Cowan

We present the results of the search for candidate Planetary Nebulae interacting with the interstellar medium (PN-ISM) in the framework of the INT Photometric H$\alpha$ Survey (IPHAS) and located in the right ascension range 18h-20h. The…