Solar MicroNovae?

[T.C.]

New XMM Observations of the Accreting Millisecond X-ray Pulsar SAX J1808.4-3658 in Quiescence

We have performed a second observation of SAX J1808.4-3658 in quiescence (after the first in 2001, Campana et al. 2002). Reanalyzing both observations, our observation finds SAX J1808.4-3658 at a 30% lower (2 sigma) observed flux level, Fx(0.5-10 keV)=3.1*10<SUP>-14</SUP> ergs/cm<SUP>2</SUP>/s...

ui.adsabs.harvard.edu

 

[T.C.]

An archival study of extended X-ray emission from classical and recurrent novae

I discuss morphology and spectrum of the first resolved and detected classical nova shell in the X-rays - the remnant of GK Persei (1901). The existence of such a nebulosity brings about the possibility of other nova remnants emitting X-rays. I calculate that the X-ray luminosity should be about...

ui.adsabs.harvard.edu

 

[T.C.]

Deriving an X-ray luminosity function of dwarf novae based on parallax measurements

We have derived an X-ray luminosity function using parallax-based distance measurements of a set of 12 dwarf novae, consisting of Suzaku, XMM-Newton and ASCA observations. The shape of the X-ray luminosity function obtained is the most accurate to date, and the luminosities of our sample are...

ui.adsabs.harvard.edu

 

[T.C.]

Orbital Period Changes for Fourteen Novae and the Critical Failures of the Predictions of Standard Theories, the Hibernation Model, and the Magnetic Braking Model

The evolution of novae and Cataclysmic Variables (CVs) is driven by changes in the binary orbital periods. In a direct and critical test for various evolution models and their physical mechanisms, I measure the sudden changes in the period ($ΔP$) across 14 nova eruptions and I measure the steady...

arxiv.org

 

[T.C.]

"Mini Supernova" Explosion Could Have Big Impact - NASA

Using NASA’s Chandra X-ray Observatory, astronomers have studied one particular explosion that may provide clues to the dynamics of other, much larger stellar eruptions.

www.nasa.gov

 

[T.C.]

Astronomers discover micronovae, a new kind of stellar explosion

A team of astronomers, with the help of the European Southern Observatory’s Very Large Telescope (ESO’s VLT), have observed a new type of stellar explosion — a micronova. These outbursts happen on the surface of certain stars, and can each burn through around 3.5 billion Great Pyramids of Giza...

www.eso.org

 

[T.C.]

The Implications of Local Fluctuations in the Galactic Midplane for Dynamical Analysis in the Gaia Era

Orbital properties of stars, computed from their six-dimensional phase space measurements and an assumed Galactic potential, are used to understand the structure and evolution of the Galaxy. Stellar actions, computed from orbits, have the attractive quality of being invariant under certain...

arxiv.org

 

[T.C.]

As NASA’s Voyager 1 Surveys Interstellar Space, Its Density Measurements Are Making Waves

In the sparse collection of atoms that fills interstellar space, Voyager 1 has measured a long-lasting series of waves where it previously only detected sporadic bursts.

www.jpl.nasa.gov

 

[T.C.]

SOFIA/HAWC+ Traces the Magnetic Fields in NGC 1068​

https://www.researchgate.net/publication/338473426_SOFIAHAWC_Traces_the_Magnetic_Fields_in_NGC_1068

 

[T.C.]

GCOS -- The Global Cosmic Ray Observatory​

https://www.researchgate.net/publication/358975765_GCOS_--_The_Global_Cosmic_Ray_Observatory

 

[T.C.]

Magnetic field at the Galactic centre from multiwavelength dust polarization

https://academic.oup.com/mnras/article/531/4/5012/7692036

 

[T.C.]

Motion of local interstellar cloud

APOD: 2000 April 11 - The Local Interstellar Cloud

 

[T.C.]

Radcliffe wave - Wikipedia

en.wikipedia.org

The Radcliffe Wave is Waving | Center for Astrophysics | Harvard & Smithsonian

A few years ago, astronomers at the Center for Astrophysics | Harvard & Smithsonian (CfA) uncovered one of the Milky Way's greatest secrets: an enormous, wave-shaped chain of gaseous clouds in our sun’s backyard, giving birth to clusters of stars along the spiral arm of the galaxy we call home.

www.cfa.harvard.edu

 

[T.C.]

On the injection scale of the turbulence in the partially ionized very local interstellar medium

The cascade of magnetohydrodynamic (MHD) turbulence is subject to ion-neutral collisional damping and neutral viscous damping in the partially ionized interstellar medium. By examining the damping effects in the warm and partially ionized local interstellar medium, we find that the interstellar...

arxiv.org

 

[T.C.]

The Impact of Cosmic Ray Injection on Magnetic Flux Tubes in a Galactic Disk

In galactic disks, the Parker instability results when non-thermal pressure support exceeds a certain threshold. The non-thermal pressures considered in the Parker instability are cosmic ray pressure and magnetic pressure. This instability takes a long time to saturate $(>500 \, \mathrm{Myr})$...

arxiv.org