Results 21 to 30 of about 590 (185)
The Astronomical JournalSpectroscopic observations of various tracers in nearby galaxies, such as Andromeda (M31), play a crucial role in identifying and classifying individual stellar populations and nebular objects, thereby enhancing our understanding of galactic composition,
Pinjian Chen +7 more
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The Astrophysical Journal, 2023 The recent discovery of enormous Ly α nebulae (ELANe), characterized by physical extents >200 kpc and Ly α luminosities >10 ^44 erg s ^−1 , provides a unique opportunity to study the intergalactic medium and circumgalactic medium in distant galaxies ...
Jessica S. Li +10 more
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The Bochum Survey of the Southern Galactic Disk: IV. Multi‐Band Photometry
Astronomische Nachrichten, EarlyView.ABSTRACT The Southern Galactic Disk Survey (GDS) monitored a mosaic of 268 fields along a 6°‐wide stripe in the southern galactic disk from September 2010 to September 2019. These fields were observed between 21 and 407 times sim r′$$ {r}^{\prime } $$ultaneously in (8mag≲r′≲18mag$$ 8\kern0.6em \mathrm{mag}\lesssim {r}^{\prime}\lesssim 18\kern0.6em ...
Julia Blex +9 more
wiley +1 more source
A spectroscopic study of star clusters and compact emission-line nebulae in NGC 7793
Astronomy & AstrophysicsContext. Star clusters and emission-line nebulae are valuable probes of stellar populations and the chemical evolution of nearby galaxies. NGC 7793, the flocculent spiral in the Sculptor Group, contains a rich population of clusters and nebulae, although
Davoust E. +2 more
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Backscattering and Line Broadening in Orion
The Astronomical Journal, 2022 Examination of emission lines in high-velocity-resolution optical spectra of the Orion Nebula confirms that the velocity component on the red wing of the main ionization front emission line is due to backscattering in the Photon Dominated Region.
C. R. O’Dell +2 more
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History, EarlyView.Abstract This article examines an overlooked attempt to colonize the island of Trinidad during the English Revolution of the 1640s. This project was engineered by a consortium of radical puritans, seeking to create a protected enclave in the New World for separatists, anabaptists and other sectaries.
DAVID R. COMO
wiley +1 more source
BEES: Quasar Lifetime Measurements from Extended Rest-optical Emission Line Nebulae at z ∼ 6
The Astrophysical JournalMeasurements of quasar lifetimes at high redshift indicate that the earliest billion-solar-mass supermassive black holes (SMBHs) have only been active as luminous quasars for less than a million years.
Dominika Ďurovčíková +15 more
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Nebulae (emission / absorption)
Culture and Cosmos, 2012 My presentation consists of a collage on panel. Using colour laser copies of nebulae, the dual composition recombines torn pieces of several nebular images. Optically entangled from light colour patterns, the focus of each nebula resembles the opposing behaviour of absorption and emission nebula. The collages include false colour composite astronomical
openaire +1 more source
Journal of Phycology, EarlyView.Abstract The genus Paulinella represents a rare, independent case of primary endosymbiosis, providing a unique system to study the early stages of organelle evolution. Here, we expand current understanding of primary plastid endosymbiosis through the discovery and characterization of two novel photosynthetic amoebae, Paulinella marae sp. nov.
Julia Van Etten +9 more
wiley +1 more source
The Astrophysical JournalGas flows between galaxies and the circumgalactic medium (CGM) play a central role in galaxy evolution and can become observable as giant nebulae when illuminated by quasars. We present an ensemble study of nebulae around 30 UV-luminous quasars at z ≈ 0.
Zhuoqi (Will) Liu +22 more
doaj +1 more source