Douglas P. Finkbeiner
A5082668142- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Astronomical Observations and Instrumentation
- Astro and Planetary Science
- Atmospheric Ozone and Climate
- Adaptive optics and wavefront sensing
- Radio Astronomy Observations and Technology
- Solar and Space Plasma Dynamics
- Calibration and Measurement Techniques
- Scientific Research and Discoveries
- Particle Detector Development and Performance
- Space Exploration and Technology
- CCD and CMOS Imaging Sensors
- Atmospheric aerosols and clouds
- Spectroscopy and Laser Applications
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Planetary Science and Exploration
Harvard University
2014-2024
Center for Astrophysics Harvard & Smithsonian
2015-2024
Harvard University Press
2006-2023
CFA Institute
2009
Princeton University
2001-2008
Behörde für Gesundheit und Verbraucherschutz
2007
University of California, Berkeley
1997-2003
Berkeley College
1998
University of Virginia
1991
We present a full-sky 100 μm map that is reprocessed composite of the COBE/DIRBE and IRAS/ISSA maps, with zodiacal foreground confirmed point sources removed. Before using ISSA we remove remaining artifacts from IRAS scan pattern. Using DIRBE 240 data, have constructed dust temperature so may be converted to proportional column density. The varies 17 21 K, which modest but does modify estimate by factor 5. result these manipulations quality calibration resolution. A wealth filamentary detail...
We present measurements of dust reddening using the colors stars with spectra in Sloan Digital Sky Survey. measure as difference between measured and predicted a star, derived from stellar parameters Extension for Galactic Understanding Exploration Stellar Parameter Pipeline. achieve uncertainties 56, 34, 25, 29 mmag u − g, g r, r i, i z, per though uncertainty varies depending on type magnitude star. The spectrum-based confirm our earlier "blue tip" measurements, finding coefficients...
We measure cosmological parameters using the three-dimensional power spectrum $P(k)$ from over 200 000 galaxies in Sloan Digital Sky Survey (SDSS) combination with Wilkinson Microwave Anisotropy Probe (WMAP) and other data. Our results are consistent a ``vanilla'' flat adiabatic cold dark matter model constant without tilt ${(n}_{s}=1),$ running tilt, tensor modes, or massive neutrinos. Adding SDSS information more than halves WMAP-only error bars on some parameters, tightening...
We present optical light curves, redshifts, and classifications for 365 spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey. detail improvements to PS1 SN photometry, astrometry calibration that reduce systematic uncertainties in distances. combine subset of 279 ($0.03 < z 0.68$) with useful distance estimates from SDSS, SNLS, various low-z HST samples form largest combined sample consisting a total 1048 ranging $0.01 2.3$, which we...
We have created a variety of composite quasar spectra using homogeneous data set over 2200 from the Sloan Digital Sky Survey (SDSS). The sample spans redshift range 0.044 ≤ z 4.789 and an absolute r' magnitude -18.0 to -26.5. input cover observed wavelength 3800–9200 Å at resolution 1800. median covers rest-wavelength 800 8555 reaches peak signal-to-noise ratio 300 per 1 element in rest frame. identified 80 emission-line features spectrum. Emission-line shifts relative nominal laboratory...
We measure the large-scale real-space power spectrum P(k) using a sample of 205,443 galaxies from Sloan Digital Sky Survey, covering 2417 square degrees with mean redshift z~0.1. employ matrix-based method pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 22 k-bands both clustering and its anisotropy due to redshift-space distortions, narrow well-behaved window functions range 0.02 h/Mpc < k 0.3h/Mpc. pay particular attention modeling, quantifying...
We propose a comprehensive theory of dark matter that explains the recent proliferation unexpected observations in high-energy astrophysics. Cosmic ray spectra from ATIC and PAMELA require WIMP (weakly interacting massive particle). with mass ${M}_{\ensuremath{\chi}}\ensuremath{\sim}500--800\text{ }\text{ }\mathrm{GeV}$ annihilates into leptons at level well above expected thermal relic. Signals WMAP EGRET reinforce this interpretation. Limits on $\overline{p}$...
We measure the large-scale real-space power spectrum $P(k)$ using luminous red galaxies (LRGs) in Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological parameters from Wilkinson Microwave Anisotropy Probe (WMAP). employ a matrix-based estimation method Pseudo-Karhunen-Lo\`eve eigenmodes, producing uncorrelated minimum-variance measurements 20 $k$-bands of both clustering its anisotropy due redshift-space distortions, with narrow well-behaved window...
This paper describes the Sixth Data Release of Sloan Digital Sky Survey. With this data release, imaging northern Galactic cap is now complete. The survey contains images and parameters roughly 287 million objects over 9583 deg2, including scans a large range latitudes longitudes. also includes 1.27 spectra stars, galaxies, quasars, blank sky (for subtraction) selected 7425 deg2. release much more stellar spectroscopy than was available in previous releases detailed estimates temperatures,...
Abridged: We estimate the distances to ~48 million stars detected by Sloan Digital Sky Survey and map their 3D number density distribution in 100 < D 20 kpc range over 6,500 deg^2 of sky. The data show strong evidence for a Galaxy consisting an oblate halo, disk component, localized overdensities with exponential parameters (bias-corrected assumed 35% binary fraction) H_1 = 300 pc, L_1 2600 H_2 900 L_2 3600 local normalization 12%. find halo be oblate, best-fit axis ratio c/a 0.64, r^{-2.8}...
A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of exciting science opportunities next decade. The Large Synoptic Survey Telescope (LSST) have an effective aperture 6.7 meters and imaging camera field view 9.6 deg^2, be devoted ten-year 20,000 deg^2 south +15 deg. Each pointing imaged 2000 times fifteen second exposures six broad from 0.35 1.1 microns, total point-source depth r~27.5. LSST Science Book describes basic...
Pan-STARRS1 has carried out a set of distinct synoptic imaging sky surveys including the $3π$ Steradian Survey and Medium Deep in 5 bands ($grizy_{P1}$). The mean 5$σ$ point source limiting sensitivities stacked 3$π$ $grizy_{P1}$ are (23.3, 23.2, 23.1, 22.3, 21.4) respectively. upper bound on systematic uncertainty photometric calibration across is 7-12 millimag depending bandpass. astrometric using Gaia frame comes from comparison results with Gaia: standard deviation median residuals ($...
Here we present the New York University Value-Added Galaxy Catalog (NYU-VAGC), a catalog of local galaxies (mostly below redshift about 0.3) based on set publicly-released surveys (including 2dFGRS, 2MASS, PSCz, FIRST, and RC3) matched to Sloan Digital Sky Survey (SDSS) Data Release 2. Excluding areas masked by bright stars, photometric sample covers 3514 square degrees spectroscopic 2627 (with 85% completeness). Earlier, proprietary versions this have formed basis many SDSS investigations...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg2 five-band (ugriz) imaging with photometry for over 88 million unique objects, 367,360 spectra galaxies, quasars, stars, calibrating blank sky patches selected 2627 this area, tables measured parameters from these data. reach a depth r ≈ 22.2 (95% completeness limit point sources) are photometrically astrometrically calibrated to 2% rms 100 mas per...
This paper describes the Fourth Data Release of Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The release includes five-band photometric for 180 million objects selected over 6670 deg2 and 673,280 spectra galaxies, quasars, stars from 4783 those imaging using standard SDSS target selection algorithms. These numbers represent a roughly 27% increment Third Release; previous releases are included in present release. also an additional 131,840...
The DEEP2 and COMBO-17 surveys are used to study the evolution of luminosity function red blue galaxies $z \sim 1$. Schechter fits show that, since = 1$, $M^*_B$ dims by $\sim$ 1.3 mag per unit redshift for both color classes, $ϕ^*$ shows little change, while has formally nearly quadrupled. At face value, number density remained roughly constant $ z whereas that been rising. Luminosity densities support conclusions, but we note most red-galaxy occurs between our data local in highest bin,...
Abstract We present a new three-dimensional map of dust reddening, based on Gaia parallaxes and stellar photometry from Pan-STARRS 1 2MASS. This covers the sky north decl. −30°, out to distance few kiloparsecs. contains three major improvements over our previous work. First, inclusion dramatically improves estimates nearby stars. Second, we incorporate spatial prior that correlates density across sightlines. produces smoother map, with more isotropic clouds smaller uncertainties,...
Data from the Fermi-LAT reveal two large gamma-ray bubbles, extending 50° above and below Galactic center (GC), with a width of about 40° in longitude. The emission associated these bubbles has significantly harder spectrum (dN/dE ∼ E−2) than inverse Compton electrons disk, or gamma rays produced by decay pions proton–interstellar medium collisions. There is no significant spatial variation intensity within between north south bubbles. are spatially correlated hard-spectrum microwave excess...
The Sloan Digital Sky Survey has validated and made publicly available its First Data Release. This consists of 2099 square degrees five-band (u, g, r, i, z) imaging data, 186,240 spectra galaxies, quasars, stars calibrating blank sky patches selected over 1360 this area, tables measured parameters from these data. data go to a depth r ~ 22.6 are photometrically astrometrically calibrated 2% rms 100 milli-arcsec per coordinate, respectively. cover the range 3800--9200 A, with resolution...
This paper describes the Third Data Release of Sloan Digital Sky Survey (SDSS). release, containing data taken up through 2003 June, includes imaging in five bands over 5282 deg2, photometric and astrometric catalogs 141 million objects detected these data, spectra 528,640 selected 4188 deg2. The pipelines analyzing both images spectroscopy are unchanged from those used our Second Release.
This paper describes the Fifth Data Release (DR5) of Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through June 2005 and represents completion SDSS-I project (whose successor, SDSS-II will continue mid-2008). It five-band photometric for 217 million objects selected over 8000 square degrees, 1,048,960 spectra galaxies, quasars, stars from 5713 degrees that imaging data. These numbers represent a roughly 20% increment those Fourth Release; previous releases are...
An unsupervised software ``robot'' that automatically and robustly reduces analyzes CCD observations of photometric standard stars is described. The robot measures extinction coefficients other parameters in real time and, more carefully, on the next day. It also data from an all-sky $10 \mu m$ camera to detect clouds; taken during cloudy periods are rejected. reports its findings back observers analysts via World-Wide Web. can be used assess photometricity, build site conditions. robot's...
We describe the design and data sample from DEEP2 Galaxy Redshift Survey, densest largest precision-redshift survey of galaxies at z ~ 1 completed to date. The has conducted a comprehensive census massive galaxies, their properties, environments, large-scale structure down absolute magnitude M_B = -20 via ~90 nights observation on DEIMOS spectrograph Keck Observatory. covers an area 2.8 deg^2 divided into four separate fields, observed limiting apparent R_AB=24.1. Objects with < 0.7 are...