Search Publications
Probing the M_BH-σ* Relation in the Non-local Universe Using Red QSOs
Lacy, Mark; Canalizo, Gabriela; Hiner, Kyle D. +3 more
We describe a method to measure the M_BH-σ* relation in the non-local universe using dust-obscured QSOs. We present results from a pilot sample of nine Two Micron All Sky Survey red QSOs with redshifts 0.14 < z < 0.37. We find that there is an offset (0.8 dex, on average) between the position of our objects and the local relation …
Late-time Light Curves of Type II Supernovae: Physical Properties of Supernovae and Their Environment
Barlow, Michael J.; Panagia, Nino; Meixner, Margaret +9 more
We present BVRIJHK-band photometry of six core-collapse supernovae, SNe 1999bw, 2002hh, 2003gd, 2004et, 2005cs, and 2006bc, measured at late epochs (>2 yr) based on the Hubble Space Telescope (HST), and the Gemini North, and WIYN telescopes. We also show the JHK light curves of supernova impostor SN 2008S up to day 575 because it was serendipit…
On Molecular Hydrogen Formation and the Magnetohydrostatic Equilibrium of Sunspots
Lin, H.; Jaeggli, S. A.; Uitenbroek, H.
We have investigated the problem of sunspot magnetohydrostatic equilibrium with comprehensive IR sunspot magnetic field survey observations of the highly sensitive Fe I lines at 15650 Å and nearby OH lines. We have found that some sunspots show isothermal increases in umbral magnetic field strength which cannot be explained by the simplified sunsp…
Thermal and Chemical Structure Variations in Titan's Stratosphere during the Cassini Mission
Teanby, N. A.; Flasar, F. M.; Preka-Papadema, P. +12 more
We have developed a line-by-line Atmospheric Radiative Transfer for Titan code that includes the most recent laboratory spectroscopic data and haze descriptions relative to Titan's stratosphere. We use this code to model Cassini Composite Infrared Spectrometer data taken during the numerous Titan flybys from 2006 to 2012 at surface-intercepting ge…
An Interpretation of the Possible Mechanisms of Two Ground-level Enhancement Events
Gan, W. Q.; Moon, Y. -J.; Firoz, Kazi A. +1 more
We have carried out this work to clarify the possible mechanisms of two important high-energy particle events (GLE69 2005 January 20, 06:46 UT and GLE70 2006 December 13, 02:45 UT). For this purpose, the cosmic-ray intensities registered by neutron monitors at several sites have been analyzed and studied with concurrent solar flares of different e…
One Thousand and One Clusters: Measuring the Bulk Flow with the Planck ESZ and X-Ray-selected Galaxy Cluster Catalogs
Hajian, Amir; Mody, Krishnan
We present our measurement of the "bulk flow" using the kinetic Sunyaev-Zel'dovich (kSZ) effect in the Wilkinson Microwave Anisotropy Probe (WMAP) seven-year data. As the tracer of peculiar velocities, we use Planck Early Sunyaev-Zel'dovich Detected Cluster Catalog and a compilation of X-ray-detected galaxy cluster catalogs based on ROSAT All-Sky …
Star Formation and Young Population of the H II Complex Sh2-294
Samal, M. R.; Ojha, D. K.; Pandey, A. K. +3 more
The Sh2-294 H II region ionized by a single B0V star features several infrared excess sources, a photodissociation region, and also a group of reddened stars at its border. The star formation scenario in this region seems to be quite complex. In this paper, we present follow-up results of Sh2-294 H II region at 3.6, 4.5, 5.8, and 8.0 µm obse…
A Companion as the Cause of Latitude-dependent Effects in the Wind of Eta Carinae
Madura, T. I.; Hillier, D. J.; Weigelt, G. +2 more
We analyze spatially resolved spectroscopic observations of the Eta Carinae binary system obtained with the Hubble Space Telescope/STIS. Eta Car is enshrouded by the dusty Homunculus nebula, which scatters light emitted by the central binary and provides a unique opportunity to study a massive binary system from different vantage points. We invest…
The Illumination and Growth of CRL 2688: An Analysis of New and Archival Hubble Space Telescope Observations
Frank, Adam; Corradi, Romano L. M.; Balick, Bruce +3 more
We present four-color images of CRL 2688 obtained in 2009 using the Wide-Field Camera 3 on Hubble Space Telescope. The F606W image is compared with archival images in very similar filters to monitor the proper motions of nebular structure. We find that the bright N-S lobes have expanded uniformly by 2.5% and that the ensemble of rings has translat…
Characterization of the Distribution of the Lyα Emitters in the 53w002 Field at z = 2.4
Yamada, T.; Matsuda, Y.; Hayashino, T. +2 more
We present the results of our wide-field narrowband imaging of the field around the radio galaxy 53W002 at z = 2.390 with Subaru/Suprime-Cam. A custom-made filter, NB413, centered at 4140 Å with a width of 83 Å is used to observe the 31' × 24' area around the radio galaxy. We detected 204 Lyα emitters (LAEs) at z = 2.4 with a rest-frame equivalent…