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The MOSDEF Survey: Electron Density and Ionization Parameter at z ~ 2.3
Siana, Brian; Shapley, Alice E.; Reddy, Naveen A. +8 more
Using observations from the MOSFIRE Deep Evolution Field survey, we investigate the physical conditions of star-forming regions in z ∼ 2.3 galaxies, specifically the electron density and ionization state. From measurements of the [O II]λλ3726,3729 and [S II]λλ6716,6731 doublets, we find a median electron density of ∼250 cm-3 at z ∼ 2.3,…
The Chandra COSMOS Legacy survey: optical/IR identifications
Finoguenov, A.; Jahnke, K.; Silverman, J. D. +27 more
We present the catalog of optical and infrared counterparts of the Chandra COSMOS-Legacy Survey, a 4.6 Ms Chandra program on the 2.2 deg2 of the COSMOS field, combination of 56 new overlapping observations obtained in Cycle 14 with the previous C-COSMOS survey. In this Paper we report the I, K, and 3.6 µm identifications of the 22…
The SFR-M* Relation and Empirical Star-Formation Histories from ZFOURGE* at 0.5 < z < 4
Papovich, Casey; Dickinson, Mark; Inami, Hanae +19 more
We explore star formation histories (SFHs) of galaxies based on the evolution of the star formation rate stellar mass relation (SFR-M*). Using data from the FourStar Galaxy Evolution Survey (ZFOURGE) in combination with far-IR imaging from the Spitzer and Herschel observatories we measure the SFR-M* relation at 0.5 < z <…
A systematic search for changing-look quasars in SDSS
Ross, Nicholas P.; Magnier, Eugene; Horne, Keith +10 more
We present a systematic search for changing-look quasars based on repeat photometry from Sloan Digital Sky Survey (SDSS) and Pan-STARRS1, along with repeat spectra from SDSS and SDSS-III Baryon Oscillation Spectroscopic Survey. Objects with large, |Δg| > 1 mag photometric variations in their light curves are selected as candidates to look for c…
Extended Lyman α haloes around individual high-redshift galaxies revealed by MUSE
Steinmetz, M.; Carollo, C. M.; Verhamme, A. +22 more
We report the detection of extended Lyα emission around individual star-forming galaxies at redshifts z = 3-6 in an ultradeep exposure of the Hubble Deep Field South obtained with MUSE on the ESO-VLT. The data reach a limiting surface brightness (1σ) of ~1 × 10-19 erg s-1 cm-2 arcsec-2 in azimuthally ave…
Planck intermediate results. XLVIII. Disentangling Galactic dust emission and cosmic infrared background anisotropies
Miville-Deschênes, M. -A.; Boulanger, F.; Bernard, J. -P. +157 more
Using the Planck 2015 data release (PR2) temperature maps, we separate Galactic thermal dust emission from cosmic infrared background (CIB) anisotropies. For this purpose, we implement a specifically tailored component-separation method, the so-called generalized needlet internal linear combination (GNILC) method, which uses spatial information (t…
The global shape, density and rotation of Comet 67P/Churyumov-Gerasimenko from preperihelion Rosetta/OSIRIS observations
Jorda, L.; Lara, L. M.; Lamy, P. +45 more
The Rosetta spacecraft reached Comet 67P/Churyumov-Gerasimenko (hereafter 67P/C-G) in August 2014 at an heliocentric distance of 3.6 a.u. and was then put in orbit around its nucleus to perform detailed observations. Among the collected data are the images acquired by the OSIRIS instrument up to the perihelion passage of the comet in August 2015, …
Planck 2015 results. VIII. High Frequency Instrument data processing: Calibration and maps
Kneissl, R.; Miville-Deschênes, M. -A.; Boulanger, F. +223 more
This paper describes the processing applied to the cleaned, time-ordered information obtained from the Planck High Frequency Instrument (HFI) with the aim of producing photometrically calibrated maps in temperature and (for the first time) in polarization. The data from the entire 2.5-year HFI mission include almost five full-sky surveys. HFI obse…
The realm of the galaxy protoclusters. A review
Overzier, Roderik A.
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 findings related to galaxy formation in the densest regions of the early universe. We discuss the main search techn…
SDSS-IV/MaNGA: Spectrophotometric Calibration Technique
Bizyaev, Dmitry; Schlegel, David J.; Bershady, Matthew A. +19 more
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA), one of three core programs in the Sloan Digital Sky Survey-IV, is an integral-field spectroscopic survey of roughly 10,000 nearby galaxies. It employs dithered observations using 17 hexagonal bundles of 2″ fibers to obtain resolved spectroscopy over a wide wavelength range of 3600-10300 …