Results 61 to 70 of about 266,062 (301)

Classification and analysis of emission-line galaxies using mean field independent component analysis [PDF]

, 2013
We present an analysis of the optical spectra of narrow emission-line galaxies, based on mean field independent component analysis (MFICA). Samples of galaxies were drawn from the Sloan Digital Sky Survey (SDSS) and used to generate compact sets of ...
Allen, James T., Baldwin, Jack A., Ferland, Gary J., Hewett, Paul C., Richardson, Chris T.   +4 more
core   +3 more sources

SDSS-IV eBOSS emission-line galaxy pilot survey [PDF]

Astronomy & Astrophysics, 2016
The Sloan Digital Sky Survey IV extended Baryonic Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) will observe 195,000 emission-line galaxies (ELGs) to measure the Baryonic Acoustic Oscillation standard ruler (BAO) at redshift 0.9. To test different ELG selection algorithms, 9,000 spectra were observed with the SDSS spectrograph as a pilot survey ...
Comparat, J., Delubac, T., Jouvel, S., Raichoor, A., Kneib, J-P., Yèche, C., Abdalla, F. B., Le Cras, C., Maraston, C., Wilkinson, D. M., Zhu, G., Jullo, E., Prada, F., Schlegel, D., Xu, Z., Zou, H., Bautista, J., Bizyaev, D., Bolton, A., Brownstein, J. R., Dawson, K. S., Escoffier, S., Gaulme, P., Kinemuchi, K., Malanushenko, E., Malanushenko, V., Mariappan, V., Newman, J. A., Oravetz, D., Pan, K., Percival, W. J., Prakash, A., Schneider, D. P., Simmons, A., Abbott, T. M. C., Allam, S., Banerji, M., Benoit-Lévy, A., Bertin, E., Brooks, D., Capozzi, D., Rosell, A. Carnero, Kind, M. Carrasco, Carretero, J., Castander, F. J., Cunha, C. E., Costa, L. N., Desai, S., Doel, P., Eifler, T. F., Estrada, J., Flaugher, B., Fosalba, P., Frieman, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gutierrez, G., Honscheid, K., James, D. J., Kuehn, K., Kuropatkin, N., Lahav, O., Lima, M., Maia, M. A. G., March, M., Marshall, J. L., Miquel, R., Plazas, A. A., Reil, K., Roe, N., Romer, A. K., Roodman, A., Rykoff, E. S., Sako, M., Sanchez, E., Scarpine, V., Sevilla-Noarbe, I., Soares-Santos, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thaler, J., Thomas, D., Walker, A. R., Zhang, Y.   +87 more
openaire   +9 more sources

Galaxy Evolution in a Pilot Survey up to z=1 and CDM Halos

Advances in Astronomy, 2011
We study spectral evolution of galaxies in a magnitude limited sample of 550 galaxies from z=1 down to z=0.3 on a pencil beam of ≈10′×10′. We concentrate on the large apparent cosmological structures along the line of sight, and we bin our individual ...
E. Giraud, J. Melnick, Q.-S. Gu, H. Quintana, F. Selman, I. Toledo, P. Zelaya   +6 more
doaj   +1 more source

Emission-Line Diagnostics for Galaxies [PDF]

Proceedings of the International Astronomical Union, 2015
AbstractI will give an overview of the emission-line diagnostics used for star-forming galaxies. I will review the UV, optical, and IR diagnostics that can be used to yield information about the ISM conditions, star-formation properties, and power sources in GRB hosts, both globally, and with spatially-resolved data.
openaire   +1 more source

JHKL properties of emission-line galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 1985
On donne les couleurs JHKL dans le nouveau systeme photometrique SAAO pour des echantillons de galaxies de Seyfert 1, de Seyfert 2 et de galaxies a regions H II. On compare aux couleurs de galaxies «ordinaires»
I. S. Glass, A. F. M. Moorwood
openaire   +1 more source

Boötes-HiZELS: an optical to near-infrared survey of emission-line galaxies at z = 0.4-4.7 [PDF]

, 2017
We present a sample of ∼1000 emission-line galaxies at z = 0.4–4.7 from the ∼0.7deg^2 High-z Emission-Line Survey in the Bootes field identified with a suite of six narrow-band filters at ≈0.4–2.1 μm. These galaxies have been selected on their Ly α (73),
J. Matthee, D. Sobral, P. Best, I. Smail, F. Bian, B. Darvish, H. Rottgering, Xiaohui Fan   +7 more
semanticscholar   +1 more source

Evolution of Emission Line Galaxies [PDF]

Publications of the Astronomical Society of the Pacific, 1995
This thesis compares two samples of emission line galaxies, selected on the basis of the strength of their O III and/or H-beta emission lines. The distant sample has been drawn from the 4-Shooter transit survey undertaken by Schmidt, Schneider and Gunn (1994, AJ, 107, 1245 and references therein), and consists of 370 galaxies with emission line ...
openaire   +1 more source

Possible Local Spiral Counterparts to Compact Blue Galaxies at Intermediate Redshift [PDF]

, 2001
We identify nearby disk galaxies with optical structural parameters similar to those of intermediate-redshift compact blue galaxies. By comparing HI and optical emission-line widths, we show that the optical widths substantially underestimate the true ...
Andredakis Y. C., Elizabeth J. Barton, Liese van Zee, Tully R. B.   +3 more
core   +3 more sources

A 16 deg2 survey of emission-line galaxies at z < 1.5 in HSC-SSP Public Data Release 1 [PDF]

, 2017
We present initial results from the Subaru Strategic Program (SSP) with Hyper Suprime-Cam (HSC) on a comprehensive survey of emission-line galaxies at z 5\times10^5$ Mpc$^3$ is essential to overcome cosmic variance.
M. Hayashi, Masayuki Tanaka, R. Shimakawa, H. Furusawa, R. Momose, Y. Koyama, J. Silverman, T. Kodama, Y. Komiyama, A. Leauthaud, Yen-Ting Lin, S. Miyazaki, T. Nagao, A. Nishizawa, M. Ouchi, T. Shibuya, K. Tadaki, K. Yabe   +17 more
semanticscholar   +1 more source

Dwarf Galaxies Show Little ISM Evolution from z ∼ 1 to z ∼ 0: A Spectroscopic Study of Metallicity, Star Formation, and Electron Density

The Astrophysical Journal, 2023
We present gas-phase metallicity measurements for 583 emission line galaxies at 0.3 < z < 0.85, including 388 dwarf galaxies with $\mathrm{log}({M}_{\star }/{M}_{\odot })\lt 9.5$ , and explore the dependence of the metallicity on the stellar mass and ...
John Pharo, Yicheng Guo, Guillermo Barro Calvo, Teja Teppala, Fuyan Bian, Timothy Carleton, Sandra Faber, Puragra Guhathakurta, David C. Koo   +8 more
doaj   +1 more source