Results 31 to 40 of about 8,368 (167)

Lyman-alpha emission in star-forming galaxies

The Astrophysical Journal, 1988
IUE observations of five blue, low-metallicity, star-forming galaxies sufficiently redshifted to permit detection of Lyman-alpha are reported. The galaxies with metallicities 0.1 time solar or more have weak or absent Lyman-alpha emission. There is evidence for increasing Lyman-alpha emission with decreasing metallicity.
Lee W. Hartmann, John P. Huchra, Margaret J. Geller, Paul O'Brien, Robert Wilson   +4 more
openaire   +1 more source

Detecting the Earliest Galaxies Through Two New Sources of 21cm Fluctuations

, 2004
The first galaxies that formed at a redshift ~20-30 emitted continuum photons with energies between the Lyman-alpha and Lyman limit wavelengths of hydrogen, to which the neutral universe was transparent except at the Lyman-series resonances.
Abraham Loeb, Hogan C. J., Kaiser N., Mo H. J., Rennan Barkana, Scott D., Seljak U., Zuo L.   +7 more
core   +1 more source

On the lack of correlation between Mg II 2796, 2803 Angstrom and Lyman alpha emission in lensed star-forming galaxies [PDF]

, 2014
We examine the Mg II 2796, 2803 Angstrom, Lyman alpha, and nebular line emission in five bright star-forming galaxies at 1 ...
Bayliss, M. B., Dahle, H., Gladders, M. D., Rigby, J. R., Sharon, K., Wuyts, E.   +5 more
core   +3 more sources

Damped Lyman alpha absorber and the faint end of the galaxy luminosity function at high redshift

, 1999
We combine predictions for several hierarchical cosmogonies with observational evidence on damped Lyman alpha systems to establish a correspondence between the high redshift galaxy population and the properties of damped Lyman alpha systems.
Haehnelt, Martin G., Rauch, Michael, Steinmetz, Matthias   +2 more
core   +1 more source

Lyman-alpha absorption around nearby galaxies

, 2002
We have used STIS aboard HST to search for Lyman-alpha (Lya) absorption lines in the outer regions of eight nearby galaxies using background QSOs and AGN as probes. Lya lines are detected within a few hundred km/s of the systemic velocity of the galaxy in all cases.
Bowen, David V., Pettini, Max, Blades, J. Chris   +2 more
openaire   +2 more sources

Keck Spectroscopy of Faint 3 [PDF]

, 2011
Using deep Keck spectroscopy of Lyman break galaxies selected from infrared imaging data taken with WFC3/IR onboard the Hubble Space Telescope, we present new evidence for a reversal in the redshift-dependent fraction of star forming galaxies with ...
Dunlop, J. S., Ellis, R. S., Kneib, J. -P., McLure, R. J., Richard, J., Robertson, B. E., Schenker, M. A., Stark, D. P   +7 more
core   +4 more sources

Constraints on the z ∼ 5 Star-forming Galaxy Luminosity Function From Hubble Space Telescope Imaging of an Unbiased and Complete Sample of Long Gamma-Ray Burst Host Galaxies

The Astrophysical Journal
We present rest-frame UV Hubble Space Telescope imaging of the largest and most complete sample of 23 long-duration gamma-ray burst (GRB) host galaxies between redshifts 4 and 6.
Huei Sears, Ryan Chornock, Jay Strader, Daniel A. Perley, Peter K. Blanchard, Raffaella Margutti, Nial R. Tanvir   +6 more
doaj   +1 more source

The redshift evolution of bias and baryonic matter distribution [PDF]

, 2000
We study the distribution of baryonic and luminous matter within the framework of a hierarchical scenario. Using an analytical model for structure formation which has already been checked against observations for galaxies, Lyman-$\alpha$ clouds, clusters
Adelberger, Balian, Bardeen, Baugh, Baugh, Benoist, Benson, Benson, Bernardeau, Bernardeau, Bernardeau, Borgani, Bouchet, Colombi, Colombi, Colombi, Colombi, Croft, Davis, Fukugita, J. Silk, Kauffmann, La Franca, Le Fevre, Loveday, Magliocchetti, Mo, Munshi, Munshi, Munshi, P. Valageas, Peacock, Pearce, Peebles, Ponman, Postman, Press, R. Schaeffer, Schaeffer, Schaeffer, Schaeffer, Stephens, Valageas, Valageas, Valageas, Valageas, Valageas, Valageas, Valageas, Valageas, Willmer   +50 more
core   +3 more sources

Constraints on the z  ∼  6−13 intergalactic medium from JWST spectroscopy of Lyman-alpha damping wings in galaxies

Astronomy & Astrophysics
Context. JWST provides a unique dataset for studying the earliest stages of reionisation at z > 9, promising insights into the first galaxies. Many JWST/NIRSpec prism spectra of z > 5 galaxies have revealed smooth Lyman-alpha breaks, implying damping ...
Mason Charlotte A., Chen Zuyi, Stark Daniel P., Yi Lu Ting, Topping Michael, Tang Mengtao   +5 more
doaj   +1 more source

The Impact of Cosmic Variance on Inferences of Global Neutral Fraction Derived from Lyα Luminosity Functions during Reionization

The Astrophysical Journal, 2023
We investigate the impact of field-to-field variation, deriving from cosmic variance, in measured Ly α emitter (LAE) luminosity functions (LFs) and this variation’s impact on inferences of the neutral fraction of the intergalactic medium (IGM) during ...
Sean Bruton, Claudia Scarlata, Francesco Haardt, Matthew J. Hayes, Charlotte Mason, Alexa M. Morales, Andrei Mesinger   +6 more
doaj   +1 more source