Search Publications
3D-HST WFC3-selected Photometric Catalogs in the Five CANDELS/3D-HST Fields: Photometry, Photometric Redshifts, and Stellar Masses
Maseda, Michael V.; van Dokkum, Pieter G.; Franx, Marijn +24 more
The 3D-HST and CANDELS programs have provided WFC3 and ACS spectroscopy and photometry over ≈900 arcmin2 in five fields: AEGIS, COSMOS, GOODS-North, GOODS-South, and the UKIDSS UDS field. All these fields have a wealth of publicly available imaging data sets in addition to the Hubble Space Telescope (HST) data, which makes it possible t…
Planck 2013 results. XXIV. Constraints on primordial non-Gaussianity
Miville-Deschênes, M. -A.; Bernard, J. -P.; Planck Collaboration +237 more
The Planck nominal mission cosmic microwave background (CMB) maps yield unprecedented constraints on primordial non-Gaussianity (NG). Using three optimal bispectrum estimators, separable template-fitting (KSW), binned, and modal, we obtain consistent values for the primordial local, equilateral, and orthogonal bispectrum amplitudes, quoting as our…
Clouds in the atmosphere of the super-Earth exoplanet GJ1214b
Deming, Drake; Stevenson, Kevin B.; Désert, Jean-Michel +7 more
Recent surveys have revealed that planets intermediate in size between Earth and Neptune (`super-Earths') are among the most common planets in the Galaxy. Atmospheric studies are the next step towards developing a comprehensive understanding of this new class of object. Much effort has been focused on using transmission spectroscopy to characteriz…
Constraining the Low-mass Slope of the Star Formation Sequence at 0.5 < z < 2.5
Henry, Alaina; van Dokkum, Pieter G.; Franx, Marijn +9 more
We constrain the slope of the star formation rate (SFR; log Ψ) to stellar mass (log M sstarf) relation down to log (M sstarf/M ⊙) = 8.4 (log (M sstarf/M ⊙) = 9.2) at z = 0.5 (z = 2.5) with a mass-complete sample of 39,106 star-forming galaxies selected from the 3D-HST photometric catalogs, usi…
Dusty star-forming galaxies at high redshift
Casey, Caitlin M.; Narayanan, Desika; Cooray, Asantha
Far-infrared and submillimeter wavelength surveys have now established the important role of dusty, star-forming galaxies (DSFGs) in the assembly of stellar mass and the evolution of massive galaxies in the Universe. The brightest of these galaxies have infrared luminosities in excess of 1013 L⊙ with implied star-formation ra…
Detection of an Unidentified Emission Line in the Stacked X-Ray Spectrum of Galaxy Clusters
Bulbul, Esra; Loewenstein, Michael; Markevitch, Maxim +3 more
We detect a weak unidentified emission line at E = (3.55-3.57) ± 0.03 keV in a stacked XMM-Newton spectrum of 73 galaxy clusters spanning a redshift range 0.01-0.35. When the full sample is divided into three subsamples (Perseus, Centaurus+Ophiuchus+Coma, and all others), the line is seen at >3σ statistical significance in all three independent…
Planck 2013 results. XI. All-sky model of thermal dust emission
Miville-Deschênes, M. -A.; Boulanger, F.; Abergel, A. +244 more
This paper presents an all-sky model of dust emission from the Planck 353, 545, and 857 GHz, and IRAS 100 µm data. Using a modified blackbody fit to the data we present all-sky maps of the dust optical depth, temperature, and spectral index over the 353-3000 GHz range. This model is a good representation of the IRAS and Planck data at 5' bet…
The McGill Magnetar Catalog
Kaspi, V. M.; Olausen, S. A.
We present a catalog of the 26 currently known magnetars and magnetar candidates. We tabulate astrometric and timing data for all catalog sources, as well as their observed radiative properties, particularly the spectral parameters of the quiescent X-ray emission. We show histograms of the spatial and timing properties of the magnetars, comparing …
Unidentified Line in X-Ray Spectra of the Andromeda Galaxy and Perseus Galaxy Cluster
Boyarsky, A.; Franse, J.; Iakubovskyi, D. +1 more
We report a weak line at 3.52 ±0.02 keV in x-ray spectra of the Andromeda galaxy and the Perseus galaxy cluster observed by the metal-oxide-silicon (MOS) and p -n (PN) CCD cameras of the XMM-Newton telescope. This line is not known as an atomic line in the spectra of galaxies or clusters. It becomes stronger towards the centers of the objects; is …
Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts
Böhringer, H.; Kneissl, R.; Dahle, H. +252 more
We present constraints on cosmological parameters using number counts as a function of redshift for a sub-sample of 189 galaxy clusters from the Planck SZ (PSZ) catalogue. The PSZ is selected through the signature of the Sunyaev-Zeldovich (SZ) effect, and the sub-sample used here has a signal-to-noise threshold of seven, with each object confirmed…