lyman continuum造句

• It is situated in the southern constellation of Lyman Continuum photons ( LyC ).
• Narrow double-peaked Lyalpha emission lines are detected in the spectra of all four galaxies, compatible with predictions for Lyman continuum leakers.
• R136a1 supplies ~ 7 % of the c, it produces 43-46 % of the Lyman continuum radiation of the whole R136 cluster.
• Supernova feedback 3-5 Myr after a burst may create holes in the ISM, allowing Lyman continuum photons from the remaining massive stars to escape.
• Applying slightly more heat causes the helium to ionize fully, at which point it ceases to couple well to the Lyman continuum and does not radiate nearly as effectively.
• The first published detection of Lyman Continuum photons from T1247 was made in 2013 by Leitet et al . using data from the Far Ultraviolet Spectroscopic Explorer ( FUSE ).
• In October 2016, a study will be published in the MNRAS entitled : " Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies ".
• In August 2014, a 3-day workshop was held at the AlbaNova University Center, part of Stockholm University, titled : " Lyman Continuum Leakage and Cosmic Reionization ".
• The abstract states that : " We apply a new background subtraction routine on archival data from FUSE, in order to study local galaxies in search for possible Lyman Continuum ( LyC ) leakage.
• For Tol 1247-232 we find that only a small fraction of the intrinsic Lyman continuum photons are absorbed by dust, resulting in an escape fraction of ~ 9 %, substantially higher than the previous estimate by Leitet et al . ( 2013 ) ."
• The proposal 14B-194 states : " This single target is of enormous interest to scientific communities studying both local starburst astrophysics, and high-z galaxies and reionization, as one of the very few nearby objects that shows significant emission of ionizing Lyman continuum radiation ."
• The abstract states : " Following our first detection reported in Izotov et al . ( 2016 ) [ as above ], we present the detection of Lyman continuum ( LyC ) radiation of four other compact star-forming galaxies observed with the Cosmic Origins Spectrograph ( COS ) onboard the Hubble Space Telescope ( HST ).
• The authors analyzed the optical spectra of the GPs and concluded " While the ALFALFA survey demonstrates the role of external processes in triggering starbursts, the Green Peas show that starbursts'radiation can escape to affect their external environment ", finding " that the Peas are likely optically thin to Lyman continuum ( LyC ) radiation ."
• Helium ionization is important because it is a critical part of the formation of the corona : when solar material is cool enough that the helium within it is only partially ionized ( i . e . retains one of its two electrons ), the material cools by radiation very effectively via both black body radiation and direct coupling to the helium Lyman continuum.
• In January 2016, a letter was published in the journal Nature called : " Eight per cent leakage of Lyman continuum photons from a compact, star-forming dwarf galaxy " by authors : Y . I . Izotov, I . Orlitov? D . Schaerer, T . X . Thuan, A . Verhamme, N . G . Guseva & G . Worseck.
• The proposal's abstract, titled " Green Peas and diagnostics for Lyman continuum leaking in star-forming dwarf galaxies " states : " Our unique GP sample will allow us to combine for the first time four fundamental tests for Lyman continuum photons ( LyC ) leaking in galaxies and validate their usefulness as LyC leaking indicators : 1 ) direct measurements of the LyC; 2 ) high [ OIII ] / [ OII ] ratios; 3 ) characteristics of the Lyman alpha line profile and 4 ) residual intensities in the low-ionization ISM absorption UV lines ".
• The proposal's abstract, titled " Green Peas and diagnostics for Lyman continuum leaking in star-forming dwarf galaxies " states : " Our unique GP sample will allow us to combine for the first time four fundamental tests for Lyman continuum photons ( LyC ) leaking in galaxies and validate their usefulness as LyC leaking indicators : 1 ) direct measurements of the LyC; 2 ) high [ OIII ] / [ OII ] ratios; 3 ) characteristics of the Lyman alpha line profile and 4 ) residual intensities in the low-ionization ISM absorption UV lines ".
• This workshop focused on : " Current and future efforts to constrain the LyC escape fraction of galaxies at both low and high redshift, and the impact that this is likely to have on our understanding of cosmic reionization . " Among the lecture abstracts is one titled : " The escape of ionizing radidation from local starburst galaxies : revised Lyman continuum escape fractions for Tololo 1247-232 and Haro 11 . " by C . U . Fremling ( U Stockholm ), E . Zackrisson, ( U Stockholm ), A . Inoue, ( Osaka Sangyo U ).