Results 1 to 10 of about 14,368 (139)

CH+(1-0) in a z~2.8 galaxy group: Probe of multi-phasic turbulent gas reservoirs [PDF]

EPJ Web of Conferences, 2022
Starburst galaxies at redshifts z~2 to 4 are among the most intensely star-forming galaxies in the universe. The way they accrete their gas to form stars at such high rates is still a controversial issue.
Vidal-García Alba, Falgarone Edith, Battaia Fabrizio Arrigoni, Godard Benjamin, Ivison Rob J., Zwaan Martin A., Herrera Cinthya, Frayer David, Andreani Paola, Li Quong, Gavazzi Raphaël, Bergin Edwin, Walter Fabian, Omont Alain   +13 more
doaj   +1 more source

The polarization of scattered Lyα radiation around high-redshift galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
The high-redshift Universe contains luminous Lya emitting sources such as galaxies and quasars. The emitted Lyα radiation is often scattered by surrounding neutral hydrogen atoms. We show that the scattered Lyα radiation obtains a high level of polarization for a wide range of likely environments of high-redshift galaxies.
Mark Dijkstra, Abraham Loeb
openaire   +1 more source

PAWS and POCO: NIR Astrophotonic Instruments for Astronomy

Astronomische Nachrichten, Volume 344, Issue 8-9, October-November 2023., 2023
Abstract For near‐infrared ground and space‐based astronomy, compact photonic devices can replace the large bulk optical components in spectrographs, frequency combs, beam combiners, and sky subtraction filters, thus saving cost, reducing volume, weight, and power requirements.
Kalaga Madhav, Alan Günther, Eloy Hernandez, Stella Vjes̆nica, Daniel Bodenmüller, Andreas Stoll, Christer Sandin, Haydar Altuğ Yıldırım, Martin M. Roth   +8 more
wiley   +1 more source

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

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

A comparison of metal and Ly-α absorption in galactic haloes [PDF]

Serbian Astronomical Journal, 1998
The metallicity structure of galactic haloes is one of the major unknowns in modern galactic astrophysics and observational cosmology. Hereby we outline a very simple method for obtaining at least a crude picture of gas abundances, based on ...
Ćirković M.M.
doaj   +1 more source

The Cusp Plasma Imaging Detector (CuPID) CubeSat Observatory: Mission Overview

Journal of Geophysical Research: Space Physics, Volume 126, Issue 4, April 2021., 2021
Abstract The Cusp Plasma Imaging detector (CuPID) Cube Satellite Observatory is a six‐unit Cube Satellite developed to study macroscale properties of dayside magnetopause reconnection. Reconnection will be studied through imaging spatial and temporal ion dispersion signatures in the magnetospheric cusps.
B. M. Walsh, M. R. Collier, E. Atz, L. Billingsley, J. M. Broll, H. K. Connor, D. Chornay, T. Cragwell, N. Dobson, S. Eckert, D. Einhorn, G. Gallant, K. Jackson, S. Karki, J. Kujawski, K. D. Kuntz, V. Naldoza, R. A. Nutter, J. Moore, C. O’Brien, A. Perez‐Rosado, F. S. Porter, D. G. Sibeck, K. Simms, W. Skelton, N. Thomas, D. L. Turner, A. Yousuff, A. Weatherwax, A. Zosuls, E. Thomas   +30 more
wiley   +1 more source

On the total absorption cross-section of galaxies - II: The case of λ cosmologies and covering factor variation [PDF]

Serbian Astronomical Journal, 1998
In this work we expand the previous discussion of the plausibility of hypothesis of origin of the Lyα forest absorption systems in haloes of normal galaxies in connection with the HubbleDeepField (HDF) data.
Ćirković M.M., Samurović S.
doaj   +1 more source

Minihalo model for the low-redshift Lyα absorbers revisited [PDF]

Serbian Astronomical Journal, 2008
We reconsider the basic properties of the classical minihalo model of Rees and Milgrom in light of the new work, both observational (on 'dark galaxies' and masses of baryonic haloes) and theoretical (on the cosmological mass function and the history of ...
Lalović A., Ćirković M.M.
doaj   +1 more source

The VANDELS survey: A strong correlation between Ly$\alpha$ equivalent width and stellar metallicity at $\mathbf{3\leq z \leq 5}$ [PDF]

, 2020
We present the results of a new study investigating the relationship between observed Ly$\alpha$ equivalent width ($W_{\lambda}$(Ly$\alpha$)) and the metallicity of the ionizing stellar population ($Z_{\star}$) for a sample of $768$ star-forming galaxies
Cullen, F., McLure, R. J., Dunlop, J. S., Carnall, A. C., McLeod, D. J., Shapley, A. E., Amorín, R., Bolzonella, M., Castellano, M., Cimatti, A., Cirasuolo, M., Cucciati, O., Fontana, A., Fontanot, F., Garilli, B., Guaita, L., Jarvis, M. J., Pentericci, L., Pozzetti, L., Talia, M., Zamorani, G., Calabrò, A., Cresci, G., Fynbo, J. P. U., Hathi, N. P., Giavalisco, M., Koekemoer, A., Mannucci, F., Saxena, A.   +28 more
core   +4 more sources