Search Publications
Detection of high Lyman continuum leakage from four low-redshift compact star-forming galaxies
Schaerer, D.; Thuan, T. X.; Izotov, Y. I. +4 more
Following our first detection reported in Izotov et al., we present the detection of Lyman continuum (LyC) radiation of four other compact star-forming galaxies observed with the Cosmic Origins Spectrograph (COS) onboard the Hubble Space Telescope. These galaxies, at redshifts of z ∼ 0.3, are characterized by high emission-line flux ratios [O III]…
Consistent dust and gas models for protoplanetary disks. I. Disk shape, dust settling, opacities, and PAHs
Waters, L. B. F. M.; Pinte, C.; Ménard, F. +19 more
We propose a set of standard assumptions for the modelling of Class II and III protoplanetary disks, which includes detailed continuum radiative transfer, thermo-chemical modelling of gas and ice, and line radiative transfer from optical to cm wavelengths. The first paper of this series focuses on the assumptions about the shape of the disk, the d…
WATCHDOG: A Comprehensive All-sky Database of Galactic Black Hole X-ray Binaries
Heinke, C. O.; Sivakoff, G. R.; Gladstone, J. C. +1 more
With the advent of more sensitive all-sky instruments, the transient universe is being probed in greater depth than ever before. Taking advantage of available resources, we have established a comprehensive database of black hole (and black hole candidate) X-ray binary (BHXB) activity between 1996 and 2015 as revealed by all-sky instruments, scanni…
Enceladus's measured physical libration requires a global subsurface ocean
Burns, J. A.; Porco, C.; Tajeddine, R. +5 more
Several planetary satellites apparently have subsurface seas that are of great interest for, among other reasons, their possible habitability. The geologically diverse saturnian satellite Enceladus vigorously vents liquid water and vapor from fractures within a south polar depression and thus must have a liquid reservoir or active melting. However…
ALMA Spectroscopic Survey in the Hubble Ultra Deep Field: The Infrared Excess of UV-Selected z = 2-10 Galaxies as a Function of UV-Continuum Slope and Stellar Mass
Carilli, Chris; Labbé, Ivo; Bouwens, Rychard J. +25 more
We make use of deep 1.2 mm continuum observations (12.7 µJy beam-1 rms) of a 1 arcmin2 region in the Hubble Ultra Deep Field to probe dust-enshrouded star formation from 330 Lyman-break galaxies spanning the redshift range z = 2-10 (to ∼2-3 M ⊙ yr-1 at 1σ over the entire range). Given the depth and…
Solar Coronal Jets: Observations, Theory, and Modeling
Young, P. R.; Curdt, W.; Raouafi, N. E. +13 more
Coronal jets represent important manifestations of ubiquitous solar transients, which may be the source of significant mass and energy input to the upper solar atmosphere and the solar wind. While the energy involved in a jet-like event is smaller than that of "nominal" solar flares and coronal mass ejections (CMEs), jets share many common propert…
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…