Results 1 to 10 of about 468 (120)
Broadband VLA Spectral-line Survey of a Sample of Ionized Jet Candidates
The Astrophysical Journal Supplement Series, 2023 The study of the interaction between ionized jets, molecular outflows, and their environments is critical to understanding high-mass star formation, especially because jets and outflows are thought to be key in the transfer of angular momentum outward ...
E. Sanchez-Tovar +4 more
doaj +1 more source
Mapping the Multiphase Structure of H i in the Low-latitude Intermediate-velocity Arch 1
The Astrophysical Journal, 2023 We have analyzed the thermal and turbulent properties of the low-latitude intermediate-velocity Arch 1 (LLIV1). This was accomplished using archival H i emission and absorption data from two 21 cm line surveys: GHIGLS at 9.′4 resolution and DHIGLS at $1^{
Luka Vujeva +3 more
doaj +1 more source
The Astrophysical Journal, 2023 Photodissociation regions (PDRs) illuminated by high temperature ( T > 10 ^4 K) radiation fields display characteristic optical to midinfrared spectral features: emission bands that cluster around the blue limits of hydrogen series, an extended red ...
Frédéric Zagury
doaj +1 more source
Estimating Molecular Gas Content in Galaxies from Polycyclic Aromatic Hydrocarbon Emission
The Astrophysical Journal, 2023 Emission from polycyclic aromatic hydrocarbons (PAHs), a commonly used indicator of star formation activity in galaxies, also has the potential to serve as an effective empirical tracer of molecular gas.
Lulu Zhang, Luis C. Ho
doaj +1 more source
How to search for mirror stars with Gaia
Journal of High Energy Physics, 2022 We show for the first time how to conduct a direct search for dark matter using Gaia observations. Its public astrometric data may contain the signals of mirror stars, exotic compact objects made of atomic dark matter with a tiny kinetic mixing between ...
Aaron Howe +3 more
doaj +1 more source
Frontiers in Astronomy and Space Sciences, 2022 Turbulence is ubiquitous in space plasmas. It is one of the most important subjects in heliospheric physics, as it plays a fundamental role in the solar wind—local interstellar medium interaction and in controlling energetic particle transport and ...
Federico Fraternale +11 more
doaj +1 more source
Gamma-ray observations of cosmic nuclei [PDF]
EPJ Web of Conferences, 2022 Gamma rays from nuclear processes such as radioactive decay and de-excitations are among the most-direct tools to witness the production and existence of specific nuclei and isotopes in and near cosmic nucleosynthesis sites.
Diehl Roland
doaj +1 more source
The Astrophysical Journal, 2023 The spectral line energy distribution of carbon monoxide contains information about the physical conditions of the star-forming molecular hydrogen gas; however, the relation to local radiation field properties is poorly constrained.
Laura Lenkić +8 more
doaj +1 more source
The Astrophysical Journal, 2023 Emission from polycyclic aromatic hydrocarbons (PAHs) is a promising tool for estimating star formation rate (SFR) in galaxies, but the origin of its sources of excitation, which include not only young but possibly also old stars, remains uncertain.
Lulu Zhang, Luis C. Ho
doaj +1 more source
HOPS 361-C’s Jet Decelerating and Precessing through NGC 2071 IR
The Astrophysical Journal, 2023 We present a two-epoch Hubble Space Telescope study of NGC 2071 IR highlighting HOPS 361-C, a protostar producing an arced 0.2 parsec-scale jet. The proper motions for the brightest knots decrease from 350 to 100 km s ^−1 with increasing distance from ...
Adam E. Rubinstein +7 more
doaj +1 more source