Search Publications
Chandra High-resolution observations of CID-42, a Candidate Recoiling Supermassive Black Hole
Salvato, M.; Vignali, C.; Gilli, R. +15 more
We present Chandra High Resolution Camera observations of CID-42, a candidate recoiling supermassive black hole (SMBH) at z = 0.359 in the COSMOS survey. CID-42 shows two optical compact sources resolved in the HST/ACS image embedded in the same galaxy structure and a velocity offset of ~1300 km s-1 between the Hβ broad and narrow emiss…
Automatic Detection and Tracking of Coronal Mass Ejections. II. Multiscale Filtering of Coronagraph Images
Morgan, Huw; Gallagher, Peter T.; Habbal, Shadia R. +1 more
Studying coronal mass ejections (CMEs) in coronagraph data can be challenging due to their diffuse structure and transient nature, and user-specific biases may be introduced through visual inspection of the images. The large amount of data available from the Solar and Heliospheric Observatory (SOHO), Solar TErrestrial RElations Observatory (STEREO…
Spitzer- and Herschel-based Spectral Energy Distributions of 24 µm Bright z ~ 0.3-3.0 Starbursts and Obscured Quasars
Fadda, Dario; Yan, Lin; Sajina, Anna +2 more
In this paper, we characterize the infrared spectral energy distributions (SEDs) of mid-IR-selected z ~ 0.3-3.0 and L IR ~ 1011-1013 L ⊙ galaxies, and study how their SEDs differ from those of local and high-z analogs. Infrared SEDs depend both on the power source (AGN or star formation) and the dust dis…
Low-altitude Reconnection Inflow-Outflow Observations during a 2010 November 3 Solar Eruption
Reeves, Katharine K.; Savage, Sabrina L.; McKenzie, David E. +3 more
For a solar flare occurring on 2010 November 3, we present observations using several SDO/AIA extreme-ultraviolet (EUV) passbands of an erupting flux rope followed by inflows sweeping into a current sheet region. The inflows are soon followed by outflows appearing to originate from near the termination point of the inflowing motion—an observation …
Source-plane Reconstruction of the Bright Lensed Galaxy RCSGA 032727-132609
Rigby, Jane R.; Barrientos, L. Felipe; Sharon, Keren +4 more
We present new Hubble Space Telescope/Wide Field Camera 3 imaging data of RCSGA 032727-132609, a bright lensed galaxy at z = 1.7 that is magnified and stretched by the lensing cluster RCS2 032727-132623. Using this new high-resolution imaging, we modify our previous lens model (which was based on ground-based data) to fully understand the lensing …
The Assembly History of Disk Galaxies. II. Probing the Emerging Tully-Fisher Relation during 1 < z < 1.7
Treu, Tommaso; Ellis, Richard S.; Newman, Andrew B. +3 more
Through extended integrations using the recently installed deep depletion CCD on the red arm of the Keck I Low Resolution Imaging Spectrograph, we present new measurements of the resolved spectra of 70 morphologically selected star-forming galaxies with i AB < 24.1 in the redshift range 1 <~ z < 1.7. Using the formalism introdu…
IDCS J1426.5+3508: Sunyaev-Zel'dovich Measurement of a Massive Infrared-selected Cluster at z = 1.75
Stern, D.; Carlstrom, J. E.; Leitch, E. M. +14 more
We report 31 GHz CARMA observations of IDCS J1426.5+3508, an infrared-selected galaxy cluster at z = 1.75. A Sunyaev-Zel'dovich (SZ) decrement is detected toward this cluster, indicating a total mass of M 200, m = (4.3 ± 1.1) × 1014 M ⊙ in agreement with the approximate X-ray mass of ~5 × 1014 M ⊙<…
Comet C/2011 W3 (Lovejoy): Orbit Determination, Outbursts, Disintegration of Nucleus, Dust-tail Morphology, and Relationship to New Cluster of Bright Sungrazers
Sekanina, Zdenek; Chodas, Paul W.
We describe the physical and orbital properties of C/2011 W3. After surviving perihelion passage, the comet was observed to undergo major physical changes. The permanent loss of the nuclear condensation and the formation of a narrow spine tail were observed first at Malargue, Argentina, on December 20 and then systematically at Siding Spring, Aust…
The Black Hole Spin and Soft X-Ray Excess of the Luminous Seyfert Galaxy Fairall 9
Fabian, Andrew C.; Brenneman, Laura W.; Reynolds, Christopher S. +4 more
We present an analysis of all XMM-Newton and Suzaku X-ray spectra of the nearby luminous Seyfert galaxy Fairall 9. Confirming previous analyses, we find robust evidence for a broad iron line associated with X-ray reflection from the innermost accretion disk. By fitting a spectral model that includes a relativistically ionized reflection component,…
Initiation of Coronal Mass Ejection and Associated Flare Caused by Helical Kink Instability Observed by SDO/AIA
Cho, K. -S.; Park, Sung-Hong; Kumar, Pankaj +2 more
In this paper, we present multiwavelength observations of helical kink instability as a trigger of a coronal mass ejection (CME) which occurred in active region NOAA 11163 on 2011 February 24. The CME was associated with an M3.5 limb flare. High-resolution observations from the Solar Dynamics Observatory/Atmospheric Imaging Assembly suggest the de…