Search Publications
Missions
Journals
Publication Years
Space Telescope and Optical Reverberation Mapping Project. IV. Anomalous Behavior of the Broad Ultraviolet Emission Lines in NGC 5548
Im, M.; Geier, S.; Brandt, W. N. +98 more
During an intensive Hubble Space Telescope (HST) Cosmic Origins Spectrograph (COS) UV monitoring campaign of the Seyfert 1 galaxy NGC 5548 performed from 2014 February to July, the normally highly correlated far UV continuum and broad emission line variations decorrelated for ∼60-70 days, starting ∼75 days after the first HST/COS observation. Foll…
Relativistic reverberation in the accretion flow of a tidal disruption event
Miller, Jon M.; Kara, Erin; Dai, Lixin +1 more
Our current understanding of the curved space-time around supermassive black holes is based on actively accreting black holes, which make up only ten per cent or less of the overall population. X-ray observations of that small fraction reveal strong gravitational redshifts that indicate that many of these black holes are rapidly rotating; however,…
Low-metallicity Absorbers Account for Half of the Dense Circumgalactic Gas at z ≲ 1
Prochaska, J. Xavier; Lehner, Nicolas; Howk, J. Christopher +2 more
We present an analysis of the metallicity distribution of the dense circumgalactic medium (CGM) of galaxies at 0.1 ≲ z ≲ 1.1 as probed by partial Lyman limit systems (pLLSs, 16.1 < log {N}{{H}{{I}}} < 17.2) and LLSs (17.2 ≤ log {N}{{H}{{I}}} < 17.7 in our sample). The new H I-selected sample, drawn from our Hubble Sp…
The BOSS Emission-line Lens Survey. III. Strong Lensing of Lyα Emitters by Individual Galaxies
Brownstein, Joel R.; Marques-Chaves, Rui; Oguri, Masamune +8 more
We introduce the Baryon Oscillation Spectroscopic Survey (BOSS) Emission-Line Lens Survey GALaxy-Lyα EmitteR sYstems (BELLS GALLERY) Survey, which is a Hubble Space Telescope program to image a sample of galaxy-scale strong gravitational lens candidate systems with high-redshift Lyα emitters (LAEs) as the background sources. The goal of the BELLS …
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…