Results 31 to 40 of about 2,674,261 (271)

Revisiting the emission line source detection problem in integral field spectroscopic data

Astronomische Nachrichten, Volume 344, Issue 5, June 2023., 2023
Abstract We present a 3‐dimensional matched filtering approach for the blind search of faint emission‐line sources in integral‐field spectroscopic datasets. The filter is designed to account for the spectrally rapidly varying background noise due to the telluric air glow spectrum.
Edmund Christian Herenz
wiley   +1 more source

FIREBall-2: The Faint Intergalactic Medium Redshifted Emission Balloon Telescope [PDF]

Astrophysical Journal, 2020
The Faint Intergalactic Medium Redshifted Emission Balloon (FIREBall) is a mission designed to observe faint emission from the circumgalactic medium of moderate-redshift (z ∼ 0.7) galaxies for the first time.
E. Hamden, D. Martin, B. Milliard, D. Schiminovich, S. Nikzad, J. Evrard, G. Kyne, R. Grange, J. Montel, Etienne Pirot, K. Hoadley, D. O’Sullivan, N. Melso, Vincent Picouet, D. Vibert, P. Balard, P. Blanchard, Marty Crabill, S. Pascal, F. Mirc, N. Bray, A. Jewell, J. B. Bird, Jose Zorilla, H. Ong, M. Matuszewski, N. Lingner, R. Augustin, M. Limon, A. Gomes, P. Tapie, Xavier Soors, I. Zenone, M. Saccoccio   +33 more
semanticscholar   +1 more source

Effect of the metallicity of the intergalactic medium in the Lyman‐α forest correlation function

Astronomische Nachrichten, Volume 344, Issue 1-2, January-February 2023., 2023
Abstract The Lyman‐α (Lyα) forest allows to constraint cosmological parameters at redshifts above 1.8$$ 1.8 $$ using the technique of standard rulers determined by baryon acoustic oscillations. This makes it an important tracer for the study of the universe at high redshift.
Andrea Muñoz‐Gutiérrez, Axel de la Macorra   +1 more
wiley   +1 more source

Lyman-α transmission properties of the intergalactic medium in the CoDaII simulation [PDF]

Monthly notices of the Royal Astronomical Society, 2020
The decline in abundance of Lyman-α (Lyα) emitting galaxies at z ≳ 6 is a powerful and commonly used probe to constrain the progress of cosmic reionization.
M. Gronke, P. Ocvirk, C. Mason, J. Matthee, S. Bosman, J. Sorce, J. Lewis, K. Ahn, D. Aubert, Taha Dawoodbhoy, I. Iliev, P. Shapiro, G. Yepes   +12 more
semanticscholar   +1 more source

Relationship of Retinal Vessel Caliber with Age‐Related Macular Degeneration

Journal of Ophthalmology, Volume 2022, Issue 1, 2022., 2022
Purpose. Evaluate the relationship between retinal vascular caliber and age‐related macular degeneration (AMD) severity or progression. Methods. A retrospective secondary analysis of 1172 fundus photographs and clinical data from the prospective Age‐Related Eye Disease Study (AREDS).
Sara Toulouie, Sean Chang, Julia Pan, Kiersten Snyder, Glenn Yiu, Yedi Zhou   +5 more
wiley   +1 more source

(Nearly) Model-independent Constraints on the Neutral Hydrogen Fraction in the Intergalactic Medium at z ∼ 5–7 Using Dark Pixel Fractions in Lyα and Lyβ Forests

The Astrophysical Journal, 2023
Cosmic reionization was the last major phase transition of hydrogen from neutral to highly ionized in the intergalactic medium (IGM). Current observations show that the IGM is significantly neutral at z > 7 and largely ionized by z ∼ 5.5.
Xiangyu Jin, Jinyi Yang, Xiaohui Fan, Feige Wang, Eduardo Bañados, Fuyan Bian, Frederick B. Davies, Anna-Christina Eilers, Emanuele Paolo Farina, Joseph F. Hennawi, Fabio Pacucci, Bram Venemans, Fabian Walter   +12 more
doaj   +1 more source

The trouble with STEAM and why we use it anyway

Science Education, Volume 105, Issue 2, Page 209-231, March 2021., 2021
Abstract As an emerging field of theory, research, and practice, STEAM (Science, Technology, Engineering, Arts, and Mathematics) has received attention for its efforts to incorporate the arts into the rubric of STEM (Science, Technology, Engineering, and Mathematics) learning.
Sam Mejias, Naomi Thompson, Raul Mishael Sedas, Mark Rosin, Elisabeth Soep, Kylie Peppler, Joseph Roche, Jen Wong, Mairéad Hurley, Philip Bell, Bronwyn Bevan   +10 more
wiley   +1 more source

On the Electromagnetic Vacuum Origins of Dark Energy, Dark Matter, and Astrophysical Jets

Advances in High Energy Physics, Volume 2021, Issue 1, 2021., 2021
We use a semiclassical version of the Nexus paradigm of quantum gravity in which the quantum vacuum at large scales is dominated by the second quantized electromagnetic field to demonstrate that a virtual photon field can affect the geometric evolution of Einstein manifolds or Ricci solitons.
Stuart Marongwe, Saibal Ray
wiley   +1 more source

Consistent modelling of the meta-galactic UV background and the thermal/ionization history of the intergalactic medium [PDF]

Monthly notices of the Royal Astronomical Society, 2018
Recent observations suggest that hydrogen reionization ends late (⁠|$z$| ≃ 6) and proceeds quickly. We present here a new model of the meta-galactic ultraviolet/X-ray background (UVB) that is consistent with this. It adopts the most recent determinations
E. Puchwein, F. Haardt, M. Haehnelt, P. Madau   +3 more
semanticscholar   +1 more source

The physics of the intergalactic medium [PDF]

Reviews of Modern Physics, 2009
69 pages; accepted version to appear in Reviews of Modern Physics; text and equation typos corrected; all figures ...
openaire   +2 more sources