Artboard 33atençãoArtboard 18atualizarconectividadeArtboard 42boletocarrinhocartãoArtboard 45cartão SaraivacelularArtboard 42Artboard 23checkArtboard 28Artboard 17?compararcompartilharcompartilhar ativoArtboard 28Artboard 43Artboard 49Artboard 47Artboard 15Artboard 32ebookArtboard 22Artboard 5Artboard 25Artboard 1Artboard 42Artboard 11fecharfilmesArtboard 23gamesArtboard 4Artboard 9Artboard 6hqimportadosinformáticaArtboard 7Artboard 3Artboard 12Artboard 25Artboard 34Artboard 43Artboard 44curtirArtboard 24Artboard 13livrosArtboard 24Artboard 31menumúsicaArtboard 27Artboard 30Artboard 36Artboard 44outrospapelariaArtboard 17Artboard 6Artboard 27Artboard 30Artboard 29Artboard 26Artboard 2Artboard 20Artboard 35estrelaestrela ativorelógiobuscaArtboard 50Artboard 26toda saraivaArtboard 40Artboard 21Artboard 10Artboard 37usuárioArtboard 46Artboard 33Artboard 8seta
e-book

The Properties of Star-Forming Galaxies at Z-2 - Kinematics, Stellar Populations, and Metallicities (Cód: 9540750)

Dawn Erb

Universal-Publishers.com (Livros Digitais)

Ooops! Este produto não está mais a venda.
Mas não se preocupe, temos uma versão atualizada para você.

Ooopss! Este produto está fora de linha, mas temos outras opções para você.
Veja nossas sugestões abaixo!

R$ 57,86

em até 1x de R$ 57,86 sem juros

Total:

Em até 1x sem juros de


Crédito:
Boleto:
Cartão Saraiva:

Total:

Em até 1x sem juros de


The Properties of Star-Forming Galaxies at Z-2 - Kinematics, Stellar Populations, and Metallicities

R$57,86

Descrição

We study the properties of star-forming galaxies at redshift z~2, an era in which a substantial fraction of the stellar mass in the universe formed. Using 114 near-IR spectra of the H-alpha and [N II] emission lines and model spectral energy distributions fit to rest-frame UV through IR photometry, we examine the galaxies' star formation properties, dynamical masses and velocity dispersions, spatially resolved kinematics, outflow properties, and metallicities as a function of stellar mass and age. While the stellar masses of the galaxies in our sample vary by a factor of ~500, dynamical masses from H-alpha velocity dispersions and indirect estimates of gas masses imply that the variation of stellar mass is due as much to the evolution of the stellar population and the conversion of gas into stars as to intrinsic differences in the total masses of the galaxies. About 10% of the galaxies are apparently young starbursts with high gas fractions, caught just as they have begun to convert large amounts of gas into stars. Using the [N II]/H-alpha ratio of composite spectra to estimate the average oxygen abundance, we find a monotonic increase in metallicity with stellar mass. From the estimated gas fractions, we conclude that the observed mass-metallicity relation is primarily driven by the increase in metallicity as gas is converted to stars. The picture that emerges is of galaxies with a broad range in stellar population properties, from young galaxies with ages of a few tens of Myr, stellar masses M~10^9 Msun, and metallicities Z~ 1/3 Zsun, to massive objects with M*~10^11 Msun, Z~Zsun, and ages as old as the universe allows. All, however, are rapidly star-forming, power galactic-scale outflows, and have masses in gas and stars of at least ~10^10 Msun, in keeping with their likely role as the progenitors of elliptical galaxies seen today.

Características

Produto sob encomenda Não
Marca Universal-Publishers.com (Livros Digitais)
Cód. Barras 9781612337951
Acabamento e-book
Início da Venda 06/09/2012
Territorialidade Internacional
Formato Livro Digital Pdf
Gratuito Não
Tamanho do Arquivo 16625
Proteção Drm Sim
Idioma 337
Código do Formato Pdf
Ano da Publicação 112
Peso 0.00 Kg
AutorDawn Erb