A5100459171- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Astro and Planetary Science
- Remote Sensing in Agriculture
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Dark Matter and Cosmic Phenomena
- Impact of Light on Environment and Health
- Spectroscopy and Laser Applications
- Adaptive optics and wavefront sensing
- CCD and CMOS Imaging Sensors
- Plant Water Relations and Carbon Dynamics
- Atmospheric Ozone and Climate
- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Atmospheric and Environmental Gas Dynamics
- Advanced Optical Sensing Technologies
University of Utah
2015-2024
National Astronomical Observatories
2015-2024
Chinese Academy of Sciences
2015-2024
Nanjing Medical University
2024
Jiangsu Province Hospital
2024
Fudan University
2024
State Grid Corporation of China (China)
2024
University of Chinese Academy of Sciences
2006-2023
Zhejiang Lab
2022-2023
Shenzhen Institutes of Advanced Technology
2023
We present the large-scale correlation function measured from a spectroscopic sample of 46,748 luminous red galaxies Sloan Digital Sky Survey. The survey region covers 0.72 h-3 Gpc3 over 3816 deg2 and 0.16 < z 0.47, making it best yet for study structure. find well-detected peak in at 100 h-1 Mpc separation that is an excellent match to predicted shape location imprint recombination-epoch acoustic oscillations on low-redshift clustering matter. This detection demonstrates linear growth...
We present the cosmological implications from final measurements of clustering using galaxies, quasars, and Ly$\alpha$ forests completed Sloan Digital Sky Survey (SDSS) lineage experiments in large-scale structure. These experiments, composed data SDSS, SDSS-II, BOSS, eBOSS, offer independent baryon acoustic oscillation (BAO) angular-diameter distances Hubble relative to sound horizon, $r_d$, eight different samples six growth rate parameter, $f\sigma_8$, redshift-space distortions (RSD)....
The halo occupation distribution (HOD) describes the relation between galaxies and dark matter at level of individual halos. properties residing centers halos differ from those satellite because differences in their formation histories. Using a smoothed particle hydrodynamics (SPH) simulation semi-analytic (SA) galaxy model, we examine separate contributions central to HOD, more specifically probability P(N|M) that virial mass M contains N particular class. In agreement with earlier results...
We study the luminosity and color dependence of galaxy two-point correlation function in Sloan Digital Sky Survey, starting from a sample ~200,000 galaxies over 2500 deg2. concentrate our analysis on volume-limited subsamples specified ranges, for which we measure projected wp(rp), is directly related to real-space ξ(r). The amplitude wp(rp) rises continuously with Mr ≈ -17.5 -22.5, most rapid increase occurring above characteristic L* (Mr -20.5). Over scales 0.1 h-1 Mpc < rp 10 Mpc,...
We measure the luminosity and color dependence of galaxy clustering in largest-ever redshift survey, main sample Sloan Digital Sky Survey Seventh Data Release. focus on projected correlation function wp(rp) volume-limited samples, extracted from parent ∼700,000 galaxies over 8000 deg2, extending up to 0.25. interpret our measurements using halo occupation distribution (HOD) modeling assuming a ΛCDM cosmology (inflationary cold dark matter with cosmological constant). The amplitude grows...
We describe the current plans for a spectroscopic survey of millions stars in Milky Way galaxy using Guo Shou Jing Telescope (GSJT, formerly Large Area Multi-Object Spectroscopic - LAMOST). The will obtain spectra 2.5 million brighter than $r<19$ during dark/grey time, and 5 $r<17$ or $J<16$ on nights that are moonlit have low transparency. begin fall 2012, run at least four years. telescope design constrains optimal declination range observations to $10^\circ<\delta<50^\circ$, site...
We model the luminosity-dependent projected two-point correlation function of DEEP2 (z ~ 1) and SDSS 0) galaxies within HOD framework. At both epochs, there is a tight between central galaxy luminosity halo mass, with slope scatter decreasing for larger masses, fraction satellite decreases at higher luminosity. find little evolution in relation mass scales host halos above same threshold. Combining these results theoretical predictions typical growth halos, we establish an evolutionary...
We examine the dependence of mass-to-light (M/L) ratio large-scale structure on cosmological parameters, in models that are constrained to match observations projected galaxy correlation function w(rp). For a sequence with fixed P(k) shape and increasing normalization \sig8, we find parameters halo occupation distribution (HOD) reproduce SDSS measurements w(rp) as luminosity. Using these HOD calculate mean M/L ratios mass populate halos N-body simulations compute larger scale environments,...
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is acquiring integral-field spectroscopy for the largest sample of galaxies to date. By 2020, MaNGA Survey --- one three core programs in fourth-generation Sloan Digital Sky (SDSS-IV) will have observed a statistically representative 10$^4$ local Universe ($z\lesssim0.15$). In addition robust data-reduction pipeline (DRP), has developed data-analysis (DAP) that provides higher-level data products. To accompany first public release...
We present griz light curves of 146 spectroscopically confirmed Type Ia Supernovae ($0.03 < z <0.65$) discovered during the first 1.5 years Pan-STARRS1 Medium Deep Survey. The natural photometric system is determined by a combination on-site measurements instrument response function and observations spectrophotometric standard stars. find that systematic uncertainties in are currently 1.2\% without accounting for uncertainty HST Calspec definition AB system. A Hubble diagram constructed with...
The nearly circular (mean eccentricity <e>~0.06) and coplanar mutual inclination <i>~3 deg) orbits of the Solar System planets motivated Kant Laplace to put forth hypothesis that are formed in disks, which has developed into widely accepted theory planet formation. Surprisingly, first several hundred extrasolar (mostly Jovian) discovered using Radial Velocity (RV) technique commonly on eccentric (<e> ~ 0.3). This raises a fundamental question: Are its formation special? Kepler mission found...
ABSTRACT We present the first comprehensive halo occupation distribution (HOD) analysis of Dark Energy Spectroscopic Instrument (DESI) One-Percent Survey luminous red galaxy (LRG) and Quasi Stellar Object (QSO) samples. constrain HOD each sample test possible extensions by fitting redshift-space 2-point correlation functions in 0.15 &lt; r 32 h−1 Mpc a set fiducial redshift bins. use AbacusSummit cubic boxes at Planck 2018 cosmology as model templates forward clustering with AbacusHOD...
We measure the projected correlation function w_p(r_p) from Sloan Digital Sky Survey for a flux-limited sample of 118,000 galaxies and volume limited subset 22,000 with absolute magnitude M_rM_1=4.74 X 10^{13}\msun/h is _M=(M/M_1)^{0.89}, 75% residing in less massive, single-galaxy halos. This physically motivated model has same number free parameters as power law, it fits data better, χ^2/d.o.f.=0.93 compared to 6.12 (for 10 degrees freedom, incorporating covariance errors). Departures...
We calculate the real- and redshift-space clustering of massive galaxies at z ∼ 0.5 using first semester data by Baryon Oscillation Spectroscopic Survey (BOSS). study correlation functions a sample 44,000 in redshift range 0.4 < 0.7. present halo-occupation distribution modeling results discuss implications for manner which occupy dark matter halos. The majority our are central living halos mass 1013 h−1 M☉, but 10% satellites 10 times more massive. These broadly agreement with earlier...
view Abstract Citations (218) References (46) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Deep Wide-Field Spectrophotometry of the Open Cluster M67 Fan, X. ; Burstein, D. Chen, J. -S. Zhu, Jiang, Z. Wu, H. Yan, Zheng, Zhou, Fang, L. -Z. F. Deng, Chu, Y. Hester, Windhorst, R. A. Li, Lu, P. Sun, W. -H. -P. Tsay, Chiueh, T. Chou, C. -K. Ko, -M. Lin, -C. Guo, -J. Byun, -I. We present nine color CCD intermediate-band spectrophotometry a two square degree field...
We perform Halo Occupation Distribution (HOD) modeling to interpret small-scale and intermediate-scale clustering of 35,000 luminous early-type galaxies their cross-correlation with a reference imaging sample normal L* in the Sloan Digital Sky Survey. The results show that most these red (LRGs) are central residing massive halos typical mass M ~ few times 10^13 10^14 Msun/h, while percent them have be satellites within order produce strong auto-correlations exhibited on smaller scales. mean...
Millisecond duration bright radio pulses at 1.4-GHz with high dispersion measures (DM) were reported by Lorimer et al., Keane and Thornton al. Their all-sky rate is $\approx 10^4$/day above $\sim$1 Jy. Related events are "Perytons" -- similar pulsed, dispersed sources, but most certainly local. Suggested models of fast bursts (FRBs) can originate in the Earth's atmosphere, stellar coronae, other galaxies, even cosmological distances. Using physically motivated assumptions combined observed...
We have traced the past 7 Gyr of red galaxy stellar mass growth within dark matter halos. determined halo occupation distribution, which describes how galaxies reside halos, using observed luminosity function and clustering 40,696 0.2<z<1.0 in Bootes. Half 10^{11.9} Msun/h halos host a central galaxy, this fraction increases with increasing mass. do not observe any evolution relationship between mass, although we expect both masses to evolve over cosmic time. find that contained population...
We study the internal gradients of stellar population properties within 1.5 Re for a representative sample 721 galaxies, with masses ranging between 109 M⊙ and 1011.5 from SDSS-IV MaNGA Integral-Field-Unit survey. Through use our full spectral fitting code firefly, we derive light- mass-weighted their radial gradients, as well star formation metal enrichment histories. also quantify impact that different models routines have on derived gradient measurements. In analysis, find age tend to be...
The MaNGA Survey (Mapping Nearby Galaxies at Apache Point Observatory) is one of three core programs in the Sloan Digital Sky IV. It obtaining integral field spectroscopy (IFS) for 10K nearby galaxies a spectral resolution R~2000 from 3,622-10,354A. design survey driven by set science requirements on precision estimates following properties: star formation rate surface density, gas metallicity, stellar population age, and abundance ratio, their gradients; kinematics; enclosed gravitational...
We probe the systematic uncertainties from 113 Type Ia supernovae (SNIa) in Pan-STARRS1 (PS1) sample along with 197 SN a combination of low-redshift surveys. The companion paper by Rest et al. (2013) describes photometric measurements and cosmological inferences PS1 sample. largest uncertainty stems calibration low-z samples. increase observed Calspec standards 7 to 10 used define system. SDSS-II systems are compared discrepancies up ~0.02 mag recovered. find proper way treat intrinsic...
We present the measurements and modelling of small-to-intermediate scale (0.1--25 Mpc/h) projected three-dimensional (3D) redshift-space two-point correlation functions (2PCFs) local galaxies in Sloan Digital Sky Survey (SDSS) Data Release 7. find a clear dependence galaxy clustering on luminosity both redshift spaces, generally being stronger for more luminous samples. The are successfully interpreted within halo occupation distribution (HOD) framework with central satellite velocity bias...
In fiber-fed galaxy redshift surveys, the finite size of fiber plugs prevents two fibers from being placed too close to one another, limiting ability studying clustering on all scales. We present a new method for correcting such collision effects in statistics based spectroscopic observations. Our makes use observations tile overlap regions measure contributions collided population, and therefore recover full statistics. The is rooted solid theoretical ground tested extensively mock...
We present results on the clustering of 282 068 galaxies in Baryon Oscillation Spectroscopic Survey (BOSS) sample massive with redshifts 0.4 < z 0.7 which is part Sloan Digital Sky III project. Our cover a large range scales from ∼500 to ∼90 h−1 Mpc. compare these estimates expectations flat Λ cold dark matter (ΛCDM) standard cosmological model parameters compatible Wilkinson Microwave Anisotropy Probe 7 data. use MultiDark simulation, one largest N-body runs presently available, together...
The recently discovered fast radio bursts (FRBs), presumably of extra-galactic origin, have the potential to become a powerful probe intergalactic medium (IGM). We point out few such applications. provide expressions for dispersion measure and rotation as function redshift, we discuss sensitivity these measures HeII reionization IGM magnetic field. Finally calculate microlensing effect from an isolate, extragalctic stellar-mass compact object on FRB spectrum. time delays between two lensing...