Results 71 to 80 of about 67,060 (301)

The PHANGS-AstroSat Atlas of Nearby Star-forming Galaxies

open access: yesThe Astrophysical Journal Supplement Series
We present the Physics at High Angular resolution in Nearby GalaxieS (PHANGS)-AstroSat atlas, which contains UV imaging of 31 nearby star-forming galaxies captured by the Ultraviolet Imaging Telescope on the AstroSat satellite.
Hamid Hassani   +31 more
doaj   +1 more source

Episodic absorption in the outflow of V603 Aquilae [PDF]

open access: yes, 2000
We report on the time-dependent behaviour of ultraviolet spectral lines in Hubble Space Telescope Goddard High-Resolution Spectrograph data of the classical nova V603 Aql.
Knigge, C   +3 more
core  

Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events

open access: yesAstronomische Nachrichten, EarlyView.
ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay   +4 more
wiley   +1 more source

GALEX Ultraviolet Photometry of Globular Clusters in M31

open access: yes, 2004
We present ultraviolet photometry for globular clusters (GCs) in M31 from 15 square deg of imaging using the Galaxy Evolution Explorer (GALEX). We detect 200 and 94 GCs with certainty in the near-ultraviolet (NUV; 1750 - 2750 Angstroms) and far ...
Alex S. Szalay   +30 more
core   +3 more sources

Experimental methods in chemical engineering: Atomic absorption spectrometry—AAS

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Elements absorb electromagnetic radiation (light) of a specific wavelength in proportion to the number of atoms in its path. As the atoms absorb this light energy, electrons rise from the ground state to an excited state. In atomic absorption spectrometry (AAS), high temperatures produce clouds of atoms from the sample (atomization) and ...
Emily Cintia Tossi de A. Costa   +4 more
wiley   +1 more source

The Leakage of Lyman-continuum Photons from a Major Merger at z ∼ 1

open access: yesThe Astrophysical Journal
We report the detection of Lyman-continuum (LyC) photons from a massive interacting system at z = 1.097 in the Hubble Ultra Deep Field. The LyC detection is made in the far-ultraviolet F154W band of the UVIT telescope on board AstroSat.
Soumil Maulick   +3 more
doaj   +1 more source

Exploring the solar system [PDF]

open access: yes, 1964
Nasa programs for solar activity and radiation ...

core   +1 more source

Current Star Formation in the Outer Rings among Early-Type Disk Galaxies

open access: yes, 2015
By using the ARRAKIS, the atlas of stellar rings in galaxies (Comeron et al. 2014) based on data of the S4G survey, we have compiled a list of early-type, S0-Sb, disk galaxies with outer stellar ring-like features (`pure' rings, R, or pseudorings, R ...
Kostiuk, I. P., Sil'chenko, O. K.
core   +2 more sources

Synergistic Engineering of Oxygen Vacancies and Topological Surface States in Bi2Te3/TiO2‐X Heterostructures for Highly Efficient Photothermal‐Driven CO2 Photoreduction

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Integrating the topological insulator Bi2Te3 with oxygen‐deficient TiO2‐X creates a synergistic platform for full‐spectrum CO2 reduction, achieving high‐selectivity C2+ production via enhanced photothermal catalysis and tailored charge dynamics.
Bingke Zhang   +11 more
wiley   +1 more source

Toward a 2D H I Map of the Local Interstellar Medium

open access: yesThe Astronomical Journal
Obtaining a complete census of gas in the local interstellar medium (LISM;
Allison Youngblood   +11 more
doaj   +1 more source

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