Results 21 to 30 of about 14,388 (158)

Statistical and Dynamical Decoupling of the IGM from Dark Matter

Advances in Astronomy, Volume 2011, Issue 1, 2011., 2011
Although the gravitational field in the universe is dominated by dark matter, cosmological observations show that the statistical properties of cosmic baryonic matter are significantly and systematically decoupled from that of the underlying dark matter. The dynamical reason of the decoupling is the difference of the nonlinear evolution of baryon fluid
Li-Zhi Fang, Weishan Zhu, Martin Hardcastle   +2 more
wiley   +1 more source

The Lyα Reference Sample. XIV. Lyα Imaging of 45 Low-redshift Star-forming Galaxies and Inferences on Global Emission

The Astrophysical Journal Supplement Series, 2023
We present Ly α imaging of 45 low-redshift star-forming galaxies observed with the Hubble Space Telescope. The galaxies have been selected to have moderate to high star formation rates (SFRs) using far-ultraviolet (FUV) luminosity and H α equivalent ...
Jens Melinder, Göran Östlin, Matthew Hayes, Armin Rasekh, J. Miguel Mas-Hesse, John M. Cannon, Daniel Kunth, Peter Laursen, Axel Runnholm, E. Christian Herenz, Matteo Messa, Daniel Schaerer, Anne Verhamme, T. Emil Rivera-Thorsen, Lucia Guaita, Thomas Marquart, Johannes Puschnig, Alexandra Le Reste, Andreas Sandberg, Emily Freeland, Joanna Bridge   +20 more
doaj   +1 more source

Lyman-alpha emission galaxies at a redshift of z = 5.7 in the FORS Deep Field [PDF]

, 2006
We present the results of a search for Lyman-alpha emission galaxies at z~ 5.7 in the FORS Deep Field. The objective of this study is to improve the faint end of the luminosity function of high-redshift Lyman-alpha emitting galaxies and to derive ...
A. Gabasch, Ajiki, Ajiki, Appenzeller, Barkana, Bertin, Bunker, C. Tapken, Charlot, Cowie, D. Mehlert, Dawson, Dawson, Fynbo, Gabasch, Heidt, Hu, Hu, I. Appenzeller, J. Heidt, Kennicutt, Kudritzki, Kunth, Lehnert, Maier, Malhotra, Malhotra, Martin, Neufeld, Noll, Ouchi, Ouchi, R. Bender, Rhoads, Rhoads, Rhoads, S. Noll, S. Seitz, Santos, Shapley, Snigula, Steidel, Taniguchi, Taniguchi, Taniguchi, Thommes, U. Hopp, van Breukelen, Venemans, W. Seifert, Wang   +50 more
core   +1 more source

Primordial Non‐Gaussianity in the Large‐Scale Structure of the Universe

Advances in Astronomy, Volume 2010, Issue 1, 2010., 2010
Primordial non‐Gaussianity is a potentially powerful discriminant of the physical mechanisms that generated the cosmological fluctuations observed today. Any detection of significant non‐Gaussianity would thus have profound implications for our understanding of cosmic structure formation. The large‐scale mass distribution in the Universe is a sensitive
Vincent Desjacques, Uroš Seljak, Dragan Huterer   +2 more
wiley   +1 more source

Lyα visibility from z = 4.5 to 11 in the UDS field: Evidence for a high neutral hydrogen fraction and small ionized bubbles at z ∼ 7

Astronomy & Astrophysics
The resonant scattering nature of Lyα photons interacting with neutral hydrogen makes Lyα emitters (LAEs) robust tracers of the intergalactic neutral hydrogen fraction, and thus sensitive probes of cosmic reionization.
Napolitano L., Pentericci L., Dickinson M., Arrabal Haro P., Taylor A. J., Calabrò A., Bhagwat A., Santini P., Arevalo-Gonzalez F., Begley R., Castellano M., Ciardi B., Donnan C. T., Dottorini D., Dunlop J. S., Finkelstein S. L., Fontana A., Giavalisco M., Hirschmann M., Jung I., Koekemoer A. M., Kokorev V., Llerena M., Lucas R. A., Mascia S., Merlin E., Pérez-González P. G., Stanton T. M., Tripodi R., Wang X., Weiner B. J.   +30 more
doaj   +1 more source

A New Constraint on the Ly$\alpha$ Fraction of UV Very Bright Galaxies at Redshift 7

, 2016
We study the extent to which very bright (-23.0 < MUV < -21.75) Lyman-break selected galaxies at redshifts z~7 display detectable Lya emission. To explore this issue, we have obtained follow-up optical spectroscopy of 9 z~7 galaxies from a parent sample ...
Dunlop, James S., Fevre, Olivier Le, Furusawa, Hisanori, Furusawa, Junko, Fynbo, Johan P. U., Kajisawa, Masaru, Kashikawa, Nobunari, Kobayashi, Masakazu A. R., Naito, Yoshiaki, Nakata, Fumiaki, Okura, Yuki, Ouchi, Masami, Sekiguchi, Kazuhiro, Shimasaku, Kazuhiro, Takata, Tadafumi, Taniguchi, Yoshiaki, Yamada, Toru, Yasuda, Naoki   +17 more
core   +4 more sources

Lyman alpha Emitting Galaxies in the Nearby Universe

, 2015
The Lya emission line of HI is intrinsically the brightest feature in the spectrum of astrophysical nebulae, making it a very attractive observational tool with which to survey galaxies.
Hayes, Matthew
core   +1 more source

Large Population of ALMA Galaxies at z>6 with Very High [OIII]88um to [CII]158um Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit? [PDF]

, 2020
We present our new ALMA observations targeting [OIII]88um, [CII]158um, [NII]122um, and dust continuum emission for three Lyman break galaxies at z=6.0293-6.2037 identified in the Subaru/Hyper Suprime-Cam survey.
Bakx, Tom, Egami, Eiichi, Ferrara, Andrea, Fujimoto, Seiji, Gallerani, Simona, Harikane, Yuichi, Hashimoto, Takuya, Inoue, Akio K., Kohno, Kotaro, Kojima, Takashi, Matsuda, Yuichi, Matsuo, Hiroshi, Matsuoka, Yoshiki, Moriwaki, Kana, Nagao, Tohru, Ono, Yoshiaki, Ouchi, Masami, Pallottini, Andrea, Shibuya, Takatoshi, Sugahara, Yuma, Tadaki, Ken-ichi, Tamura, Yoichi, Vallini, Livia   +22 more
core   +2 more sources

Extreme equivalent-width-selected low-mass starbursts at z = 4 − 9: Insights into their role in cosmic reionization

Astronomy & Astrophysics
We investigate the properties of extreme emission line galaxies (EELGs) at z = 4 − 9 and their role in reionization. Compact, low-mass galaxies with intense optical emission lines are linked to elevated specific star formation rates (sSFRs) and recent ...
Llerena M., Pentericci L., Amorín R., Ferrara A., Dickinson M., Arevalo-Gonzalez F., Calabrò A., Napolitano L., Mascia S., Arrabal Haro P., Begley R., Cleri N. J., Davis K., Hu W., Kartaltepe J. S., Koekemoer A. M., Lucas R. A., McGrath E., McLeod D. J., Papovich C., Stanton T. M., Taylor A. J., Tripodi R., Wang X., Yung L. Y. A.   +24 more
doaj   +1 more source

Properties of Ly-alpha emitters around the radio galaxy MRC 0316-257

, 2005
Observations of the radio galaxy MRC 0316-257 at z=3.13 and the surrounding field are presented. Using narrow- and broad-band imaging obtained with the VLT, 77 candidate Ly-alpha emitters with a rest-frame equivalent width of > 15 A were selected in a ~7'
Adelberger, Aguirre, Ajiki, Appenzeller, Archibald, Athreya, B. P. Venemans, Baldwin, Baugh, Beers, Bennert, Bertin, Bessell, Best, Best, Blakeslee, Blakeslee, Brocklehurst, Bunker, C. De Breuck, C. L. Carilli, Carilli, Chambers, Ciardullo, Cowie, Dawson, De Breuck, De Breuck, De Breuck, De Breuck, De Breuck, Della Ceca, Deutsch, Dey, Ferguson, Fouqué, Friaça, Fruchter, Fynbo, Fynbo, G. K. Miley, Giavalisco, Giavalisco, H. Ford, H. J. A. Röttgering, Hashimoto, Heckman, Hill, Hu, Hu, Hunt, J. D. Kurk, Jarvis, Keel, Keel, Kudritzki, Kurk, L. Pentericci, Lahav, Landolt, Large, Le Fèvre, Leitherer, Lia, Madau, Madau, Maier, Malhotra, Maughan, Maughan, McCarthy, Monet, Moorwood, Mushotzky, Oke, P. McCarthy, Papadopoulos, Pascarelle, Pentericci, Pentericci, Pentericci, Pentericci, Pettini, Press, R. A. Overzier, Reuland, Rhoads, Rosati, Rosati, Röttgering, Schlegel, Shapley, Shapley, Shimasaku, Spergel, Stanford, Steidel, Steidel, Steidel, Steidel, Steidel, Stevens, Stone, T. Heckman, Tapken, Thommes, Toft, Tozzi, Venemans, Venemans, Venemans, Vernet, W. J. M. van Breugel, White, Willott, Zirm   +115 more
core   +1 more source