A Massive Disk Galaxy at z > 3 along the Line of Sight of QSO 1508+5714

作者：Wang Yiping^*; Yamada Toru; Tanaka Ichi; Tye Masanori

来源：Publications of the Astronomical Society of Japan, 2009, 61(5): 1179-1184.

DOI：10.1093/pasj/61.5.1179

• galaxies: formation
• galaxies: high redshift-quasars: individual (QSO 1508+5714)
• intergalactic medium

We have obtained deep images in the BVRIJHKs bands of the field centered on QSO 1508+5714 (z(em) = 4.28) with the Suprime-Cam, FOCAS, and MOIRCS cameras on Subaru telescope. We report here on the detection of a B-dropout galaxy, which is 3.'' 5 north-west of the QSO sightline. A photometric redshift analysis is presented to complement the color selection. Given the photometric properties of this object (M = -22.2, making L approximate to 3 L*, if placed at its photometric redshift, z similar to 3.5), as well as the Sersic index (n similar to 1) derived from a 2-D imaging decomposition of the HST WFPC2 image taken with the I(F814) filter, the identified system is consistent with a massive disk galaxy at z > 3. If confirmed, it would be one of the most distant massive disk galaxies known so far.

• 出版日期2009
• 单位中国科学院国家天文台