Zobrazeno 1 - 10
of 478
pro vyhledávání: '"Xia, X Y"'
With the aim of exploring the fast evolutionary path from the blue cloud of star-forming galaxies to the red sequence of quiescent galaxies in the local universe, we select a local advanced merging infrared luminous and ultraluminous galaxy (adv-merg
Externí odkaz:
http://arxiv.org/abs/1604.07122
Autor:
An, F. X., Zheng, X. Z., Wang, W. -H., Huang, J. -S., Kong, X., Wang, J. -X., Fang, G. W., Zhu, F., Gu, Q. -S., Wu, H., Hao, L., Xia, X. -Y.
Publikováno v:
Fang Xia An et al. 2014 ApJ, 784, 152
Using deep narrow-band $H_2S1$ and $K_{s}$-band imaging data obtained with CFHT/WIRCam, we identify a sample of 56 H$\alpha$ emission-line galaxies (ELGs) at $z=2.24$ with the 5$\sigma$ depths of $H_2S1=22.8$ and $K_{s}=24.8$ (AB) over 383 arcmin$^{2
Externí odkaz:
http://arxiv.org/abs/1402.3599
We perform photometric analyses for a bright early-type galaxy (ETG) sample with 2949 galaxies ($M_{\rm r}<-22.5$ mag) in the redshift range of 0.05 to 0.15, drawn from the SDSS DR7 with morphological classification from Galaxy Zoo 1. We measure the
Externí odkaz:
http://arxiv.org/abs/1305.0337
Autor:
Liu, F. S., Guo, Yicheng, Koo, David C., Trump, Jonathan R., Barro, Guillermo, Yesuf, Hassen, Faber, S. M., Giavalisco, M., Cassata, P., Koekemoer, A. M., Pentericci, L., Castellano, M., Cheung, Edmond, Mao, Shude, Xia, X. Y., Grogin, Norman A., Hathi, Nimish P., Huang, Kuang-Han, Kocevski, Dale, McGrath, Elizabeth J., Wuyts, Stijn
We have made a serendipitous discovery of a massive cD galaxy at z=1.096 in a candidate rich cluster in the HUDF area of GOODS-South. This brightest cluster galaxy is the most distant cD galaxy confirmed to date. Ultra-deep HST/WFC3 images reveal an
Externí odkaz:
http://arxiv.org/abs/1304.4622
Autor:
Xia, X. Y., Gao, Y., Hao, C. -N., Tan, Q. H., Mao, S., Omont, A., Flaquer, B. O., Leon, S., Cox, P.
We report CO detections in 17 out of 19 infrared ultraluminous QSO (IR QSO) hosts observed with the IRAM 30m telescope. The cold molecular gas reservoir in these objects is in a range of 0.2--2.1$\times 10^{10}M_\odot$ (adopting a CO-to-${\rm H_2}$ c
Externí odkaz:
http://arxiv.org/abs/1202.6490
We search for ongoing major dry-mergers in a well selected sample of local Brightest Cluster Galaxies (BCGs) from the C4 cluster catalogue. 18 out of 515 early-type BCGs with redshift between 0.03 and 0.12 are found to be in major dry-mergers, which
Externí odkaz:
http://arxiv.org/abs/0904.2379
We analyse mid-infrared (MIR) spectroscopic properties for 19 ultra-luminous infrared quasars (IR QSOs) in the local universe based on the spectra from the Infrared Spectrograph on board the Spitzer Space Telescope. The MIR properties of IR QSOs are
Externí odkaz:
http://arxiv.org/abs/0807.3653
We investigate the photometric properties of the early type Brightest Cluster Galaxies (BCGs) using a carefully selected sample of 85 BCGs from the C4 cluster catalogue with redshift less than 0.1. We perform accurate background subtractions, and sur
Externí odkaz:
http://arxiv.org/abs/0712.0927
Publikováno v:
Chin.J.Astron.Astrophys.8:12-24,2008
We study the growth of black holes and stellar population in spheroids at high redshift using several (sub)mm-loud QSO samples. Applying the same criteria established in an earlier work, we find that, similar to IR QSOs at low redshift, the far-infra
Externí odkaz:
http://arxiv.org/abs/0704.3247
Publikováno v:
Mon.Not.Roy.Astron.Soc.370:1339-1350,2006
We revisit the shapes of isophotes for elliptical (E) and lenticular (S0) galaxies by studying 847 nearby early-type galaxies selected from the Sloan Digital Sky Survey Data Release 4 with velocity dispersions above 200 km/s. The IRAF task {\tt ellip
Externí odkaz:
http://arxiv.org/abs/astro-ph/0605319