Search Publications
Observational evidence of a slow downfall of star formation efficiency in massive galaxies during the past 10 Gyr
Daddi, E.; Elbaz, D.; Ciesla, L. +5 more
We study the causes of the reported mass-dependence in the slope of the SFR-M∗ relation, the so-called main sequence of star-forming galaxies, and discuss its implication on the physical processes that shaped the star formation history of massive galaxies over cosmic time. We made use of the near-infrared high-resolution imaging from th…
First Observational Support for Overlapping Reionized Bubbles Generated by a Galaxy Overdensity
Maiolino, R.; Dickinson, M.; Giavalisco, M. +21 more
We present an analysis of deep Hubble Space Telescope (HST) multi-band imaging of the BDF field specifically designed to identify faint companions around two of the few Lyα emitting galaxies spectroscopically confirmed at z ∼ 7. Although separated by only 4.4 proper Mpc these galaxies cannot generate H II regions large enough to explain the visibi…
Timing Observations of PSR J1023+0038 During a Low-mass X-Ray Binary State
Deller, Adam T.; Bogdanov, Slavko; Hessels, Jason W. T. +5 more
Transitional millisecond pulsars (tMSPs) switch, on roughly multi-year timescales, between rotation-powered radio millisecond pulsar (RMSP) and accretion-powered low-mass X-ray binary (LMXB) states. The tMSPs have raised several questions related to the nature of accretion flow in their LMXB state and the mechanism that causes the state switch. Th…
Identifying magnetic reconnection events using the FOTE method
Vaivads, A.; Cao, J. B.; Dunlop, M. +8 more
A magnetic reconnection event detected by Cluster is analyzed using three methods: Single-spacecraft Inference based on Flow-reversal Sequence (SIFS), Multispacecraft Inference based on Timing a Structure (MITS), and the First-Order Taylor Expansion (FOTE). Using the SIFS method, we find that the reconnection structure is an X line; while using th…
Marginalizing Instrument Systematics in HST WFC3 Transit Light Curves
Wakeford, H. R.; Sing, D. K.; Deming, D. +2 more
Hubble Space Telescope (HST) Wide Field Camera 3 (WFC3) infrared observations at 1.1-1.7 µm probe primarily the H2O absorption band at 1.4 µm, and have provided low-resolution transmission spectra for a wide range of exoplanets. We present the application of marginalization based on Gibson to analyze exoplanet transit light …
The (w)hole survey: An unbiased sample study of transition disk candidates based on Spitzer catalogs
van der Marel, N.; van Dishoeck, E. F.; Merín, B. +4 more
Understanding disk evolution and dissipation is essential for studies of planet formation. Transition disks, I.e., disks with large dust cavities and gaps, are promising candidates of active evolution. About two dozen candidates, selected by their spectral energy distribution (SED), have been confirmed to have dust cavities through millimeter inte…
Evolution of Intrinsic Scatter in the SFR-Stellar Mass Correlation at 0.5 < z < 3
Bell, Eric F.; Ferguson, Henry C.; Grogin, Norman A. +16 more
We present estimates of intrinsic scatter in the star formation rate (SFR)-stellar mass (M*) correlation in the redshift range 0.5< z< 3.0 and in the mass range {10}7< {M}*< {10}11M⊙. We utilize photometry in the Hubble Ultradeep Field (HUDF12) and Ultraviolet Ultra Deep Field (UVU…
The Properties of the Circumgalactic Medium in Red and Blue Galaxies: Results from the COS-GASS+COS-Halos Surveys
Heckman, Timothy; Saintonge, Amelie; Davé, Romeel +7 more
We use the combined data from the COS-GASS and COS-Halos surveys to characterize the Circum-Galactic Medium (CGM) surrounding typical low-redshift galaxies in the mass range {M}* ∼ {10}9.5-11.5 {M}⊙ , and over a range of impact parameters extending to just beyond the halo virial radius (R vir). We find t…
Constraining gravity at the largest scales through CMB lensing and galaxy velocities
Ho, Shirley; Alam, Shadab; Pullen, Anthony R. +1 more
We demonstrate a new method to constrain gravity on the largest cosmological scales by combining measurements of cosmic microwave background (CMB) lensing and the galaxy velocity field. EG is a statistic, constructed from a gravitational lensing tracer and a measure of velocities such as redshift-space distortions (RSD), that can discri…
The deepest X-ray view of high-redshift galaxies: constraints on low-rate black hole accretion
Lehmer, B. D.; Bauer, F. E.; Brandt, W. N. +16 more
We exploit the 7 Ms Chandra observations in the Chandra Deep Field-South (CDF-S), the deepest X-ray survey to date, coupled with CANDELS/GOODS-S data, to measure the total X-ray emission arising from 2076 galaxies at 3.5 ≤ z < 6.5. This aim is achieved by stacking the Chandra data at the positions of optically selected galaxies, reaching effect…