Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
The observed structure of extremely distant galaxies. / Reshetnikov, V. P.; Vasil'ev, A. A.
в: Astronomy Letters, Том 28, № 1, 01.01.2002, стр. 1-11.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
}
TY - JOUR
T1 - The observed structure of extremely distant galaxies
AU - Reshetnikov, V. P.
AU - Vasil'ev, A. A.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - We have identified 22 galaxies with photometric redshifts zph = 5-7 in the northern and southern Hubble Space Telescope deep fields. An analysis of the images of these objects shows that they are asymmetric and very compact (∼1 kpc) structures with high surface brightness and absolute magnitudes of MB ≈ -20m. The average spectral energy distribution for these galaxies agrees with the distributions for galaxies with active star formation. The star formation rate in galaxies with zph = 5-7 was estimated from their luminosity at λ = 1500 Å to be ∼30 M⊙ yr-1. The spatial density of these objects is close to the current spatial density of bright galaxies. All the above properties of the distant galaxies considered are very similar to those of the so-called Lyman break galaxies (LBGs) with z ∼ 3-4. The similarity between the objects considered and LBGs suggests that at z ∼ 6, we observe the progenitors of present-day galaxies that form during mergers of protogalactic objects and that undergo intense starbursts.
AB - We have identified 22 galaxies with photometric redshifts zph = 5-7 in the northern and southern Hubble Space Telescope deep fields. An analysis of the images of these objects shows that they are asymmetric and very compact (∼1 kpc) structures with high surface brightness and absolute magnitudes of MB ≈ -20m. The average spectral energy distribution for these galaxies agrees with the distributions for galaxies with active star formation. The star formation rate in galaxies with zph = 5-7 was estimated from their luminosity at λ = 1500 Å to be ∼30 M⊙ yr-1. The spatial density of these objects is close to the current spatial density of bright galaxies. All the above properties of the distant galaxies considered are very similar to those of the so-called Lyman break galaxies (LBGs) with z ∼ 3-4. The similarity between the objects considered and LBGs suggests that at z ∼ 6, we observe the progenitors of present-day galaxies that form during mergers of protogalactic objects and that undergo intense starbursts.
KW - теоретическая и наблюдательная космология
KW - галактики, группы и скопления галактик, межгалактический газ
UR - http://www.scopus.com/inward/record.url?scp=0036349323&partnerID=8YFLogxK
U2 - 10.1134/1.1434446
DO - 10.1134/1.1434446
M3 - Article
VL - 28
SP - 1
EP - 11
JO - Astronomy Letters
JF - Astronomy Letters
SN - 1063-7737
IS - 1
ER -
ID: 5028522