Results 1 to 10 of about 2,579,062 (253)
Correction of UBV Photometry for Emission Lines
Open Astronomy, 2003 We investigate the effect on U,B,V magnitudes of the removal of emission lines from the spectra of some symbiotic stars and novae during their nebular phases.
Skopal A.
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Diagnostics of active and eruptive prominences through hydrogen and helium lines modelling [PDF]
, 2008 In this study we show how hydrogen and helium lines modelling can be used to make a diagnostic of active and eruptive prominences. One motivation for this work is to identify the physical conditions during prominence activation and eruption. Hydrogen and
Labrosse, N. +2 more
core +8 more sources
Long-Term Optical Monitoring of Broad-Line AGNs (LoTerm AGN): Case Study of NGC 3516
Physics, 2023 Properties of the broad line region (BLR) in active galactic nuclei (AGNs) are commonly used to estimate the mass of the supermassive black hole (SMBH) that powers an AGN. However, the understanding of the physics behind the BLR remains incomplete.
Dragana Ilić +22 more
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Forbidden emission lines in protostellar outflows and jets with MUSE [PDF]
, 2023 Context. Forbidden emission lines in protoplanetary disks are a key diagnostic in studies of the evolution of the disk and the host star. They signal potential disk accretion or wind, outflow, or jet ejection processes of the material that affects the ...
Yuhiko Aoyama +34 more
core +2 more sources
Helium Line Emissivities in the Solar Corona [PDF]
The Astrophysical Journal, 2020 Abstract We present new collisional-radiative models (CRMs) for helium in the quiescent solar corona and predict the emissivities of the He and He+ lines to be observed by DKIST, Solar Orbiter, and Proba-3. We discuss in detail the rates we selected for these models, highlighting several shortcomings we have found in previous work. As no
G. Del Zanna +3 more
openaire +6 more sources
Quasar Emission - Line Strengths [PDF]
Symposium - International Astronomical Union, 1989 The strongest lines have been measured in 73 quasar spectra from the archives of the International Ultraviolet Explorer Satellite. The optically bright quasars observed with IUE were typically discovered by powerful radio emission or ultraviolet excess.
Richard Green +2 more
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EVOLUTION OF [O III] λ5007 EMISSION-LINE PROFILES IN NARROW EMISSION-LINE GALAXIES [PDF]
The Astrophysical Journal, 2011 33 pages, 8 figures, and 5 tables, to be published in ...
Wang, J., Mao, Y. F., Wei, J. Y.
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Integral Field Spectroscopy of Planetary Nebulae with MUSE
Galaxies, 2020 The Multi-Unit Spectroscopic Explorer (MUSE) is a large integral field unit mounted on the ESO Very Large Telescope. Its spatial (60 arcsecond field) and wavelength (4800–9300Å) coverage is well suited to detailed imaging spectroscopy of extended ...
Jeremy R. Walsh, Ana Monreal-Ibero
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Price and Portcall Frequency Competition in Sea-and-Land transportation supply chain under Carbon Emission Reduction Target [PDF]
SHS Web of Conferences, 2023 For carbon emission reduction by ports and shipping lines under sea-and-land transportation mode, to build a two-stage transportation supply chain model consisting of two competing ports and one shipping line The profit functions of ports and shipping ...
Wang Yueyi, Han Hao
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Characterizing Spectral Channels of Visible Emission Line Coronagraph of Aditya-L1
Frontiers in Astronomy and Space Sciences, 2021 Aditya-L1 is India’s first solar mission with the Visible Emission Line Coronagraph (VELC), which consists of three spectral channels taking high-resolution spectroscopic observations of the inner corona up to 1.5 Rʘ at 5,303, 7,892, and 10,747 Å.
Ritesh Patel +13 more
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