Formation Epoch of Field Early-Type Galaxies     

T. Kodama  R.G. Bower  E.F. Bell 《Astrophysics and Space Science》1999,265(1-4):487-488

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A Bayesian classifier for photometric redshifts: identification of high-redshift clusters     

Tadayuki Kodama  Eric F. Bell  Richard G. Bower 《Monthly notices of the Royal Astronomical Society》1999,302(1):152-166

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An anisotropy of magnetic susceptibility (AMS) fabric record of till kinematics within a Late Weichselian low Baltic till,southern Sweden          下载免费PDF全文

Nathan R. Hopkins  Johan Kleman  Edward B. Evenson  Kenneth P. Kodama 《Boreas: An International Journal of Quaternary Research》2016,45(4):846-860

Herein we report on the results of an anisotropy of magnetic susceptibility (AMS) fabric case‐study of two Late Weichselian tills exposed in a bedrock quarry in Dalby, Skåne, southern Sweden. The region possesses a complex glacial history, reflecting alternating and interacting advances of the main body of the Scandinavian Ice Sheet (SIS) and its ice lobes from the Baltic basin, perhaps driven by streaming ice. AMS till fabrics are robust indicators of ice‐flow history and till kinematics, and provide a unique tool to investigate till kinematics within and amongst till units. The till section investigated here contains ~8 m of the Dalby Till – a dark grey silt‐clay rich till deposited during one or more Baltic advance – overlain by ~1.5 m of the regional surface diamicton. AMS fabrics within the lower part of the Dalby Till conform to the regional surface fluting, and reflect sustained flow from the ENE with progressive increases in basal strain. A boulder‐rich horizon approximately 3 m from the base of the till marks a restricted excursion in till fabric direction, fabric strength and style of strain. Ice flow is from the SW and W in the upper section. We interpret these fabrics to record shifting ice flow and bed conditions at the margins of the Young Baltic Advance ice lobe in southern Sweden, prior to a short‐lived re‐advance of the main body of the SIS over mainland Sweden recorded by the surface diamicton.  相似文献   

The Colour–Magnitude Relation of Early-Type Galaxies in the Hubble Deep Field North     

T. Kodama  R.G. Bower  E.F. Bell 《Astrophysics and Space Science》2001,276(2-4):979-981

We present the rest-frame colour–magnitude diagram for 35 early-type galaxies in the Hubble Deep Field with median redshift 0.9.Although with considerable scatter, a red sequence well described by the passive evolution of an intrinsically old stellar population is observed. Comparison with the passively evolved colour–magnitude relation of the rich Coma Cluster (z = 0.023) indicates that at least ∼1/2 of the early-type galaxies in the field at this redshift are as old as those in rich clusters. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

A huge filamentary structure at z= 0.55 and star formation histories of galaxies at z < 1     

Masayuki Tanaka  Takako Hoshi  Tadayuki Kodama  Nobunari Kashikawa 《Monthly notices of the Royal Astronomical Society》2007,379(4):1546-1556

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The first appearance of the red sequence of galaxies in proto-clusters at 2 ≲z≲ 3     

Tadayuki Kodama  Ichi Tanaka  Masaru Kajisawa  Jaron Kurk  Bram Venemans  Carlos De Breuck  Joël Vernet  Chris Lidman 《Monthly notices of the Royal Astronomical Society》2007,377(4):1717-1725

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Chemical modification of sea water by submarine volcanism at Nishinoshima-Shintô Island     

Yoshimasa Toyota  Satoru Kanamori  Michihiko Kodama  Masahiro Furukawa  Shiro Okabe 《Journal of Oceanography》1982,38(5):307-312

Sea water samples, still hot from volcanic emanations were taken in a bay of Nishinoshima-Shintô Island just after volcanic activity had ceased and were analysed for borate-B, fluoride-F and bromide-Br. The hot water is considered to be formed by the conservative mixing of volcanic emanations with sea water, and the emanations containedCl, B, F andBr in the ratio of 1∶1.84×10^?3∶0.474×10^?3∶6.47×10^?3 by weight. RatiosB/Cl andF/Cl can be used as effective measures of the contribution of volcanic emanations to sea water.  相似文献   

The effects of a constant volume deformation on the magnetization of an artificial sediment     

Kenneth P. Kodama  Allen Cox 《Earth and Planetary Science Letters》1978,38(2):436-442

Anhysteretic remanent magnetization (DC field = 1 Oe, peak AC field = 1000 Oe) was given to an artificial sediment consisting of a kaolinite matrix and a 0.03% magnetic fraction of needle-shaped magnetite grains. The mean grain size of the clay flakes and the magnetite needles was approximately 0.5 μm. This sediment was subjected to plane strain while maintaining constant volume. The axis of maximum compression was shortened by as much as 331/3%, which produced no significant change in the direction of magnetization with a decrease in intensity of 28%. A continuous deformation model, in which the magnetite needles are embedded in a plastically deforming linearly homogeneous medium, failed to explain these results. A discontinuous deformation model was more successful. In this model, deformation occurs mainly in shear zones bounding blocks which translate along the shears. Only those magnetite grains in the shear zones rotate, and from symmetry considerations no net change in the direction of magnetization is predicted. Because magnetite grains rotate in opposite directions in complementary sets of shears, the model predicts a decrease in intensity comparable to that which was observed.  相似文献   

Inventory of perennial snow patches in Central Japan     

Prof. Dr. K. Higuchi  T. Iozawa  Dr. Y. Fujii  H. Kodama 《GeoJournal》1980,4(4):303-311

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A deficit of faint red galaxies in the possible large-scale structures around the RDCS J1252.9−2927 cluster at z= 1.24     

Masayuki Tanaka  Tadayuki Kodama  Masaru Kajisawa  Richard Bower  Ricardo Demarco  Alexis Finoguenov  Chris Lidman  Piero Rosati 《Monthly notices of the Royal Astronomical Society》2007,377(3):1206-1214

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