Results 91 to 100 of about 44,022 (216)

All-Sky Near Infrared Space Astrometry [PDF]

, 2019
Gaia is currently revolutionizing modern astronomy. However, much of the Galactic plane, center and the spiral arm regions are obscured by interstellar extinction, rendering them inaccessible because Gaia is an optical instrument.
Bartlett, Jennifer Lynn, Bendek, Eduardo, Benedict, Fritz, Boehm, Celine, Brown, Anthony, Conroy, Charlie, Fynbo, Johan Peter Uldall, Gnedin, Oleg, Hillenbrand, Lynne, Hobbs, David, Høg, Erik, Lindegren, Lennart, Makarov, Valeri, Martins, Alberto Krone, McArthur, Barbara, Rodriguez, David R., Shao, Mike, Sozzetti, Alessandro, Tomsick, John, Turyshev, Slava, Unwin, Stephen, White, Rick, Zhai, ChengXing   +22 more
core   +2 more sources

A Far-Ultraviolet Spectroscopic Survey of Luminous Cool Stars

, 2004
FUSE ultraviolet spectra of 8 giant and supergiant stars reveal that high temperature (3 X 10^5 K) atmospheres are common in luminous cool stars and extend across the color-magnitude diagram from Alpha Car (F0 II) to the cool giant Alpha Tau (K5 III ...
A. K. Dupree, A. Lobel, Barnes T. G., Doyle J. G., Hartman H., Hunsch M., Hunsch M., Hunsch M., J. L. Linsky, Johnson H. L., Kaufman V., Marilli E., P. R. Young, Perryman M. A. C., Reimers D., Reimers D., Rutten R. G. M., S. Redfield, Schaller G., Strassmeier K. G., T. B. Ake, Teriaca L.   +21 more
core   +1 more source

Interstellar Knowledge Dynamics

Knowledge has always been an important cornerstone of our civilization, and we believe this will continue to be true for our future interstellar society. In this study, we construct an interstellar knowledge dynamics model, which allows us to explore how innovations would look like in a social system subjected to special relativity.
openaire   +1 more source

Interstellar Dust in the Solar System: Model versus In-Situ Spacecraft Data

, 2019
In the early 1990s, contemporary interstellar dust penetrating deep into the heliosphere was identified with the in-situ dust detector on board the Ulysses spacecraft.
Altobelli, Nicolas, Grün, Eberhard, Krüger, Harald, Srama, Ralf, Sterken, Veerle, Strub, Peter   +5 more
core   +1 more source

Cloud Formation by Supernova Implosion

The Astrophysical Journal
The deposition of energy and momentum by supernova explosions has been subject to numerous studies in the past few decades. However, while there has been some work that focused on the transition from the adiabatic to the radiative stage of a supernova ...
Leonard E. C. Romano, Manuel Behrendt, Andreas Burkert   +2 more
doaj   +1 more source

Turbulent Mixing in the Interstellar Medium -- an application for Lagrangian Tracer Particles

, 2008
We use 3-dimensional numerical simulations of self-gravitating compressible turbulent gas in combination with Lagrangian tracer particles to investigate the mixing process of molecular hydrogen (H2) in interstellar clouds.
Boldyrev S, C Federrath, Glover S C O, Heyer M H, Klessen R S, Kolmogorov A N, Kritsuk A G, Larson R B, Li P S, Li Y, O'Shea B W Bryan G Bordner J Norman M L Abel T Harkness R Kritsuk A, Ostriker E C, Padoan P, Padoan P, R S Klessen, S C O Glover, Truelove J K, W Schmidt   +17 more
core   +1 more source

Dust-evacuated Zones near Massive Stars: Consequences of Dust Dynamics on Star-forming Regions

The Astrophysical Journal
Stars form within dense cores composed of both gas and dust within molecular clouds. However, despite the crucial role that dust plays in the star formation process, its dynamics is frequently overlooked, with the common assumption being a constant ...
Nadine H. Soliman, Philip F. Hopkins, Michael Y. Grudić   +2 more
doaj   +1 more source

A Numerical Model for the Dynamics of Pickup Ions Outside the Heliopause and IBEX “Ribbon” Observation

The Astrophysical Journal
The leading mechanism for the origin of the Interstellar Boundary Explorer (IBEX) “ribbon” of enhanced energetic neutral atoms (ENAs) from the outer heliosphere is the so-called secondary ENA process.
Yifan Huang, Fan Guo, Eric J. Zirnstein, Sung Jun Noh, Hui Li, Daniel B. Reisenfeld, Jacob Heerikhuisen   +6 more
doaj   +1 more source

Nondiffusive Formation of Acetaldehyde on Interstellar Ices: An Atomistic Perspective

The Astrophysical Journal Letters
The detection of interstellar complex organic molecules (iCOMs), such as acetaldehyde (CH _3 CHO), in cold astrophysical environments challenges standard grain-surface chemistry models, which rely on radical diffusion.
Berta Martínez-Bachs, Albert Rimola
doaj   +1 more source

Galactic gamma-ray observations and galactic structure [PDF]

Recent observations of gamma-rays originating in the galactic disk together with radio observations, support an emerging picture of the overall structure of our galaxy with higher interstellar gas densities and star formation rates in a region which ...
Stecker, F. W.
core   +1 more source