Search results for "LINE EMISSION"

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ALMA spectral survey of Supernova 1987A – molecular inventory, chemistry, dynamics and explosive nucleosynthesis

2017

We report the first molecular line survey of Supernova 1987A in the millimetre wavelength range. In the ALMA 210--300 and 340--360 GHz spectra, we detected cold (20--170 K) CO, 28SiO, HCO+ and SO, with weaker lines of 29SiO from ejecta. This is the first identification of HCO+ and SO in a young supernova remnant. We find a dip in the J=6--5 and 5--4 SiO line profiles, suggesting that the ejecta morphology is likely elongated. The difference of the CO and SiO line profiles is consistent with hydrodynamic simulations, which show that Rayleigh-Taylor instabilities cause mixing of gas, with heavier elements much more disturbed, making more elongated structure. We obtained isotopologue ratios of…

CIRCUMSTELLAR RINGMetallicityLINE EMISSIONINFRARED WATER-VAPORFOS: Physical sciencesAstrophysics01 natural sciences7. Clean energySpectral lineISM [radio lines]CORE-COLLAPSE SUPERNOVAENucleosynthesis0103 physical sciencesIsotopologueEjectaSupernova remnantLarge Magellanic CloudCARBON-MONOXIDE010303 astronomy & astrophysicsSolar and Stellar Astrophysics (astro-ph.SR)molecules [ISM]QBHigh Energy Astrophysical Phenomena (astro-ph.HE)Physicsabundances [ISM]010308 nuclear & particles physicssupernova remnants [ISM]II-P SUPERNOVAEAstronomyindividual: Supernova 1987A [supernovae]NEBULA M 1-92Astronomy and AstrophysicsSupernovaAstrophysics - Solar and Stellar AstrophysicsPhysics and Astronomy13. Climate actionSpace and Planetary ScienceLARGE-MAGELLANIC-CLOUDAstrophysics - High Energy Astrophysical PhenomenaMASSIVE STARSSN 1987AMonthly Notices of the Royal Astronomical Society
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CIG 96 deep optical and HI images

2018

Asymmetries in atomic hydrogen (HI) in galaxies are often caused by the interaction with close companions, making isolated galaxies an ideal framework to study secular evolution. The AMIGA project has demonstrated that isolated galaxies show the lowest level of asymmetry in their HI integrated profiles compared to even field galaxies, yet some present significant asymmetries. CIG 96 (NGC 864) is a representative case reaching a 16% level. Our aim is to investigate the HI asymmetries of the spiral galaxy CIG 96 and what processes have triggered the star-forming regions observed in the XUV pseudo-ring. We performed deep optical observations at CAHA1.23m, CAHA2.2m and VST (OmegaCAM wide-field …

Photometryinterstellar mediumobservational astronomygalactic and extragalactic astronomyAstrophysics and AstronomyPhysicsH I line emissionGalaxiesNatural SciencesOptical astronomy
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