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相关论文: GOLDRUSH. III. A Systematic Search of Protocluster…

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We present a new, objectively selected, sample of galaxy overdensities detected in the Hubble Space Telescope Medium Deep Survey. These clusters/groups were found using an automated procedure which involved searching for statistically…

天体物理学 · 物理学 2009-10-12 E. J. Ostrander , R. C. Nichol , K. U. Ratnatunga , R. E. Griffiths

We present the results of near-infrared spectroscopy of H$\alpha$ emitters (HAEs) associated with two protoclusters around radio galaxies (PKS1138-262 at $z$=2.2 and USS1558-003 at $z$=2.5) with Multi-Object Infrared Camera and Spectrograph…

星系天体物理 · 物理学 2015-06-18 Rhythm Shimakawa , Tadayuki Kodama , Ken-ichi Tadaki , Ichi Tanaka , Masao Hayashi , Yusei Koyama

We have identified 335 galaxy cluster and group candidates, 106 of which are at z > 1, using a 4.5 um selected sample of objects from a 7.25 deg^2 region in the Spitzer Infrared Array Camera (IRAC) Shallow Survey. Clusters were identified…

We observed star-forming galaxies at z~1.5 selected from the HyperSuprimeCam Subaru Strategic Program. The galaxies are part of two significant overdensities of [OII] emitters identified via narrow-band imaging and photometric redshifts…

星系天体物理 · 物理学 2020-01-22 A. Boehm , B. L. Ziegler , J. M. Perez-Martinez , T. Kodama , M. Hayashi , C. Maier , M. Verdugo , Y. Koyama

The progenitors of present-day galaxy clusters offer crucial insight into how galaxies and large-scale structure co-evolve in the early Universe. We present JWST/NIRCam grism spectroscopy of the photometrically identified $z=7.66$…

We present the galaxy cluster autocorrelation function of 277 galaxy cluster candidates with 0.25 \le z \le 1.5 in a 7 deg^2 area of the IRAC Shallow Cluster Survey. We find strong clustering throughout our galaxy cluster sample, as…

We present three candidate clusters of galaxies at redshifts most likely between 1.7 and 2.0, which corresponds to a fundamentally unexplored epoch of clusters evolution. The candidates were found by studying the environment around our…

宇宙学与河外天体物理 · 物理学 2015-05-18 M. Chiaberge , A. Capetti , F. D. Macchetto , P. Rosati , P. Tozzi , G. R. Tremblay

We present maps of the cosmic large-scale structure around the twelve most distant galaxy clusters from the Massive Cluster Survey (MACS) as traced by the projected surface density of galaxies on the cluster red sequence. Taken with the…

天体物理学 · 物理学 2009-11-13 Jeyhan S. Kartaltepe , Harald Ebeling , C. J. Ma , David Donovan

We report the discovery of an extremely dense group of massive galaxies at the centre of the protocluster at $z=3.09$ in the SSA22 field from near-infrared spectroscopy conducted with the Multi-Object InfraRed Camera and Spectrograph…

星系天体物理 · 物理学 2015-12-09 M. Kubo , T. Yamada , T. Ichikawa , M. Kajisawa , Y. Matsuda , I. Tanaka , H. Umehata

We report the spectroscopic confirmation of a new protocluster in the COSMOS field at $z$ $\sim$ 2.2, COSMOS Cluster 2.2 (CC2.2), originally identified as an overdensity of narrowband selected H$\alpha$ emitting candidates. With only two…

This paper presents a morphology classification catalog of spiral and ring features of 59,854 magnitude-limited galaxies ($r<17.8$ mag, and additional 628,005 subsamples down to $r=20$ mag) at $z=0.01-0.3$ based on the Third Public Data…

星系天体物理 · 物理学 2024-01-05 Rhythm Shimakawa , Masayuki Tanaka , Kei Ito , Makoto Ando

We construct samples of optically-selected clusters and photometric luminous red galaxies (LRGs) from the Hyper Suprime-Cam Subaru Strategic Program final year dataset covering $\sim 1200$~deg$^2$. The cluster catalogs extend out to the…

We present a catalogue of starless and protostellar clumps associated with infrared dark clouds (IRDCs) in a 40 degrees wide region of the inner Galactic Plane (b<1). We have extracted the far-infrared (FIR) counterparts of 3493 IRDCs with…

太阳与恒星天体物理 · 物理学 2015-06-19 A. Traficante , G. A. Fuller , N. Peretto , J. E. Pineda , S. Molinari

Abridged] We present here new results on the space density of rich, optically-selected, clusters of galaxies at low redshift (z<0.15). These results are based on the application of the matched filter cluster-finding algorithm to 1067 deg2…

天体物理学 · 物理学 2009-10-31 D. A. Bramel , R. C. Nichol , A. C. Pope

We use a sample of 37 of the densest clusters and protoclusters across $1.3 \le z \le 3.2$ from the Clusters Around Radio-Loud AGN (CARLA) survey to study the formation of massive cluster galaxies. We use optical $i'$-band and infrared…

We report on the current status of our search for protoclusters around quasars at z > 4. While the search is still very incomplete, clustered companion galaxies are found in virtually every case examined so far. The implied comoving number…

天体物理学 · 物理学 2007-05-23 S. G. Djorgovski , S. C. Odewahn , R. R. Gal , R. Brunner , R. R. de Carvalho

We present results of our wide-field redshift survey of galaxies in a 285 square degree region of the Shapley Supercluster (SSC), based on a set of 10529 velocity measurements (including 1201 new ones) on 8632 galaxies obtained from various…

The redshift range z=2-4 marks a critical transition in large scale structure formation, where the dynamically unrelaxed progenitors of local massive clusters undergo rapid stellar mass assembly. We report the discovery and physical…

星系天体物理 · 物理学 2026-05-18 Shuaiyi Li , Zheng Cai , Yunjing Wu , Fujiang Yu , Xiaojing Lin , Jingyang Men , Xiaoyang Wei

The $\Lambda$CDM cosmological model successfully reproduces many aspects of the galaxy and structure formation of the universe. However, the growth of large-scale structures (LSSs) in the early universe is not well tested yet with…

宇宙学与河外天体物理 · 物理学 2016-04-27 J. -W. Kim , M. Im , S. -K. Lee , A. C. Edge , M. Hyun , D. Kim , C. Choi , J. Hong , Y. Jeon , H. D. Jun , M. Karouzos , D. Kim , J. H. Kim , Y. Kim , W. -K. Park , Y. C. Taak , Y. Yoon

The study of galaxy protoclusters is beginning to fill in unknown details of the important phase of the assembly of clusters and cluster galaxies. This review describes the current status of this field and highlights promising recent…

星系天体物理 · 物理学 2018-09-18 R. A. Overzier