Results 151 to 160 of about 210,358 (255)

FAST Search for Circumstellar Atomic Hydrogen. III. Planetary Nebulae at Galactic Latitudes ∣b∣ ≥ 10°

The Astronomical Journal
The detection of circumstellar atomic hydrogen (H i ) via the 21 cm line remains a persistent challenge in planetary nebula (PN) studies, primarily due to contamination from ubiquitous interstellar H i 21 cm emission. In this paper, we report the results
Xu-Jia Ouyang, Yong Zhang, Albert Zijlstra, Chuan-Peng Zhang, Jun-ichi Nakashima, Quentin A. Parker, Xiao-Hu Li   +6 more
doaj   +1 more source

A three-dimensional reconstruction of the interstellar magnetic field toward a star-forming region

Astronomy & Astrophysics
Context. The polarized thermal emission from interstellar dust offers a valuable tool for probing both the dust and the magnetic field in the interstellar medium (ISM). However, existing observations only yield the total amount of dust emission along the
Ferrière K., Montier L., Carrière J.-S.   +2 more
doaj   +1 more source

Evidence for a multiphase, inhomogeneous interstellar medium in damped Ly alpha systems [PDF]

The large optical depth in absorption of the Ly-alpha line in damped Ly-alpha systems implies that the emission line produced by H2 regions is very broad, since the number of diffusions is very large.
Valls-Gabaud, David
core   +1 more source

Far infra-red emission lines in high redshift quasars

, 2012
We present Plateau de Bure Interferometer observations of far infra-red emission lines in BRI 0952-0115, a lensed quasar at z=4.4 powered by a super-massive black hole (M_BH=2x10^9 M_sun).
Gallerani, Simona
core  

Forecasts and Statistical Insights for Line Intensity Mapping Cross-correlations: A Case Study with 21 cm × [C ii]

The Astrophysical Journal
Intensity mapping—the large-scale mapping of selected spectral lines without resolving individual sources—is quickly emerging as an efficient way to conduct large cosmological surveys. Multiple surveys covering a variety of lines (such as the hydrogen 21
Hannah Fronenberg, Adrian Liu
doaj   +1 more source

The role of radiative torques in the molecular cloud core L43

Astronomy & Astrophysics
Context. Polarized emission from interstellar dust grains is commonly used to infer information about the underlying magnetic field from the diffuse interstellar medium to molecular cloud cores.
Scheiter M. L., Wolf S.
doaj   +1 more source

ELFO: A Python Package for Emission Line Fitting Optimization in Integral Field Spectroscopy Data

The Astronomical Journal
Integral field spectroscopy (IFS) provides spatially resolved spectra, enabling detailed studies that address the physical and kinematic properties of the interstellar medium.
Hui Guo, Guilin Liu, Jianghui Xu, Chao Geng, Zhicheng He, Shiyin Shen, Lei Hao   +6 more
doaj   +1 more source

Radio Jet Feedback on the Inner Disk of Virgo Spiral Galaxy Messier 58

The Astrophysical Journal
Spitzer spectral maps reveal a disk of highly luminous, warm (>150 K) H _2 in the center of the massive spiral galaxy Messier 58, which hosts a radio-loud active galactic nucleus (AGN). The inner 2.6 kpc of the galaxy appears to be overrun by shocks from
Patrick M. Ogle, Iván E. López, Victoria Reynaldi, Aditya Togi, R. Michael Rich, Javier Román, Osmin Caceres, Zhuofu (Chester) Li, Grant Donnelly, J. D. T. Smith, Philip N. Appleton, Lauranne Lanz   +11 more
doaj   +1 more source

Investigating the Interstellar Medium Conditions of Star Formation in High Redshift Galaxies by studying Dust Emission and Emission lines

, 2015
This thesis presents the search for the \cii 158 $\mu$m emission line, one of the brightest far-infrared (FIR) emission lines, in a selection of $z>6$ (the Universe was less than 1 Gyr old) galaxies. These galaxies have been observed with CARMA and PdBI millimeter interferometers and no \cii nor continuum emission is detected.
openaire   +2 more sources

Line-Leaking Models for Interstellar Molecular Emission and Absorption--I THE ANOMALOUS ABSORPTION AND EMISSION BY FORMALDEHYDE [PDF]

Monthly Notices of the Royal Astronomical Society, 1975
A. Margaret, D. ter Haar
openaire   +1 more source