Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Statistics of galaxy warps in the HDF North and South. / Reshetnikov, V.; Battaner, E.; Combes, F.; Jiménez-Vicente, J.
в: ASTRONOMY & ASTROPHYSICS, Том 382, № 2, 02.2002, стр. 513-521.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Statistics of galaxy warps in the HDF North and South
AU - Reshetnikov, V.
AU - Battaner, E.
AU - Combes, F.
AU - Jiménez-Vicente, J.
PY - 2002/2
Y1 - 2002/2
N2 - We present a statistical study of the presence of galaxy warps in the Hubble deep fields. Among a complete sample of 45 edge-on galaxies above a diameter of 1″3, we find 5 galaxies to be certainly warped and 6 galaxies as good candidates. In addition, 4 galaxies reveal a characteristic U-warp. Compared to statistical studies of local warps, and taking into account the strong bias against observing the outer parts of galaxies at high redshift, these numbers point towards a very high frequency of warps at z ∼ 1: almost all galaxy discs might be warped. Furthermore, the amplitude of warps are stronger than for local warps. This is easily interpreted in terms of higher galaxy interactions and matter accretion in the past. This result supports these two mechanisms as the best candidates for the origin of early warps. The mean observed axis ratio of our sample of edge-on galaxies is significantly larger in the high-z sample than is found for samples of local spiral galaxies. This might be due to disk thickening due to more frequent galaxy interactions.
AB - We present a statistical study of the presence of galaxy warps in the Hubble deep fields. Among a complete sample of 45 edge-on galaxies above a diameter of 1″3, we find 5 galaxies to be certainly warped and 6 galaxies as good candidates. In addition, 4 galaxies reveal a characteristic U-warp. Compared to statistical studies of local warps, and taking into account the strong bias against observing the outer parts of galaxies at high redshift, these numbers point towards a very high frequency of warps at z ∼ 1: almost all galaxy discs might be warped. Furthermore, the amplitude of warps are stronger than for local warps. This is easily interpreted in terms of higher galaxy interactions and matter accretion in the past. This result supports these two mechanisms as the best candidates for the origin of early warps. The mean observed axis ratio of our sample of edge-on galaxies is significantly larger in the high-z sample than is found for samples of local spiral galaxies. This might be due to disk thickening due to more frequent galaxy interactions.
KW - Galaxies: evolution
KW - Galaxies: formation
KW - General; interactions; peculiar; photometry
UR - http://www.scopus.com/inward/record.url?scp=0036472679&partnerID=8YFLogxK
U2 - 10.1051/0004-6361:20011672
DO - 10.1051/0004-6361:20011672
M3 - Article
VL - 382
SP - 513
EP - 521
JO - ASTRONOMY & ASTROPHYSICS
JF - ASTRONOMY & ASTROPHYSICS
SN - 0004-6361
IS - 2
ER -
ID: 32201257