Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Fermi National Accelerator LaboratoryUS2.4k papers
- Purdue University West LafayetteUS2.2k papers
- Northwestern UniversityUS2.2k papers
- University of FloridaUS2.2k papers
- Massachusetts Institute of TechnologyUS2.1k papers
- University of KansasUS2.1k papers
- The Ohio State UniversityUS2.1k papers
- Carnegie Mellon UniversityUS2k papers
- University of Wisconsin–MadisonUS2k papers
- Centre National de la Recherche ScientifiqueFR2k papers
- University of Maryland, College ParkUS1.9k papers
- Joint Institute for Nuclear ResearchRU1.9k papers
290 papers · 1 filter
Episodic Magnetic Bubbles and Jets: Astrophysical Implications from Laboratory Experiments
Andrea Ciardi, Sergey V. Lebedev, Adam Frank +6
Collimated outflows (jets) are ubiquitous in the universe appearing around sources as diverse as protostars and extragalactic supermassive blackholes. Jets are thought to be magnet…
Magnetic Fields in Paradigms of Planetary Nebulae and Related MHD Frontiers
Eric G. Blackman
Many, if not all, post AGB stellar systems swiftly transition from a spherical to a powerful aspherical pre-planetary nebula (pPNE) outflow phase before waning into a PNe. The pPNe…
Infrared Emission by Dust Around lambda Bootis Stars: Debris Disks or Thermally Emitting Nebulae?
J. R. Martínez-Galarza, I. Kamp, K. Y. L. Su +3
We present a model that describes stellar infrared excesses due to heating of the interstellar (IS) dust by a hot star passing through a diffuse IS cloud. This model is applied to…
Dust Processing and Grain Growth in Protoplanetary Disks in the Taurus-Auriga Star-Forming Region
B. A. Sargent, W. J. Forrest, C. Tayrien +9
Mid-infrared spectra of 65 T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope are modeled using dust at two temperatures to probe t…
Silica in Protoplanetary Disks
B. A. Sargent, W. J. Forrest, C. Tayrien +10
Mid-infrared spectra of a few T Tauri stars (TTS) taken with the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope show prominent narrow emission features indicating…
MMT/AO 5 micron Imaging Constraints on the Existence of Giant Planets Orbiting Fomalhaut at ~13-40 AU
Matthew A. Kenworthy, Eric E. Mamajek, Philip M. Hinz +5
A candidate < 3 Jupiter mass, extrasolar planet was recently imaged by Kalas et al. (2008) using HST/ACS at 12.7" (96 AU) separation from the nearby (d = 7.7 pc) young (~200 Myr) A…
Design, analysis and test of a microdots apodizer for the Apodized Pupil Lyot Coronagraph
P. Martinez, C. Dorrer, E. Aller Carpentier +4
Coronagraphic techniques are required to detect exoplanets with future Extremely Large Telescopes. One concept, the Apodized Pupil Lyot Coronagraph (APLC), is combining an apodizer…
A slowly accreting ~10 Myr old transitional disk in Orion OB1a
C. Espaillat, J. Muzerolle, J. Hernandez +7
Here we present the Spitzer IRS spectrum of CVSO 224, the sole transitional disk located within the ~10 Myr old 25 Orionis group in Orion OB1a. A model fit to the spectral energy d…
Epsilon Eridani's Planetary Debris Disk: Structure and Dynamics based on Spitzer and CSO Observations
D. Backman, M. Marengo, K. Stapelfeldt +9
Spitzer and Caltech Submillimeter Observatory (CSO) images and spectrophotometry of epsilon Eridani at wavelengths from 3.5 to 350 um reveal new details of its bright debris disk.…
Formation and Evolution of Planetary Systems (FEPS): Properties of Debris Dust around Solar-type Stars
John M. Carpenter, Jeroen Bouwman, Eric E. Mamajek +12
We present Spitzer photometric (IRAC and MIPS) and spectroscopic (IRS low resolution) observations for 314 stars in the Formation and Evolution of Planetary Systems (FEPS) Legacy p…
PAH emission from Herbig AeBe stars
Luke D. Keller, G. C. Sloan, W. J. Forrest +10
We present spectra of a sample of Herbig Ae and Be (HAeBe) stars obtained with the Infrared Spectrograph on the Spitzer Space Telescope. All but one of the Herbig stars show emissi…
Parker/buoyancy instabilities with anisotropic thermal conduction, cosmic rays, and arbitrary magnetic field strength
Timothy J. Dennis, Benjamin D. G. Chandran
We report the results of a local stability analysis for a magnetized, gravitationally stratified plasma containing cosmic rays. We account for cosmic-ray diffusion and thermal cond…
Identifying Deficiencies of Standard Accretion Disk Theory: Lessons from a Mean-Field Approach
Alexander Hubbard, Eric G. Blackman
Turbulent viscosity is frequently used in accretion disk theory to replace the microphysical viscosity in order to accomodate the observational need for in- stabilities in disks th…
Search for Gravitational Wave Bursts from Soft Gamma Repeaters
LIGO Scientific Collaboration, S. Barthelmy, N. Gehrels +2
We present the results of a LIGO search for short-duration gravitational waves (GWs) associated with Soft Gamma Repeater (SGR) bursts. This is the first search sensitive to neutron…
Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics
Eric E. Mamajek, Lynne A. Hillenbrand
While the strong anti-correlation between chromospheric activity and age has led to the common use of the Ca II H & K emission index (R'_HK = L_HK/L_bol) as an empirical age estima…
New Young Brown Dwarfs in the Orion Molecular Cloud 2/3 Region
Dawn E. Peterson, S. T. Megeath, K. L. Luhman +7
Forty new low mass members with spectral types ranging from M4-M9 have been confirmed in the Orion Molecular Cloud 2/3 region. Through deep, I, z', J, H, K photometry of a 20' x 20…
Hypersonic Buckshot: Astrophysical Jets as Heterogeneous Collimated Plasmoids
Kristopher Yirak, Adam Frank, Andrew J. Cunningham +1
Herbig-Haro (HH) jets are commonly thought of as homogeneous beams of plasma traveling at hypersonic velocities. Structure within jet beams is often attributed to periodic or ``pul…
The Radial Velocity Experiment (RAVE): second data release
T. Zwitter, A. Siebert, U. Munari +51
We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities (RVs) and stellar atmosphere parameters…
Magnetic Mixing in Red Giant and Asymptotic Giant Branch Stars
J. Nordhaus, M. Busso, G. J. Wasserburg +2
The available information on isotopic abundances in the atmospheres of low-mass Red Giant Branch (RGB) and Asymptotic Giant Branch (AGB) stars requires that episodes of extensive m…
Protostellar Outflow Evolution in Turbulent Environments
Andrew J. Cunningham, Adam Frank, Jonathan Carroll +2
The link between turbulence in star formatting environments and protostellar jets remains controversial. To explore issues of turbulence and fossil cavities driven by young stellar…
Outflow Driven Turbulence in Molecular Clouds
Jonathan J. Carroll, Adam Frank, Eric G. Blackman +2
In this paper we explore the relationship between protostellar outflows and turbulence in molecular clouds. Using 3-D numerical simulations we focus on the hydrodynamics of multipl…
Detection of Extended Hot Water in the Outflow from NGC 2071
Gary J. Melnick, Volker Tolls, David A. Neufeld +5
We report the results of spectroscopic mapping observations carried out toward a ~1 min x 1 min region within the northern lobe of the outflow from NGC 2071 using the Infrared Spec…
Beating the spin-down limit on gravitational wave emission from the Crab pulsar
The LIGO Scientific Collaboration, B. Abbott, R. Abbott +440
We present direct upper limits on gravitational wave emission from the Crab pulsar using data from the first nine months of the fifth science run of the Laser Interferometer Gravit…
An Infrared Survey of Brightest Cluster Galaxies. II: Why are Some Brightest Cluster Galaxies Forming Stars?
Christopher P. O'Dea, Stefi A. Baum, George Privon +12
Quillen et al.(2007) presented an imaging survey with the {\it Spitzer Space Telescope} of 62 brightest cluster galaxies with optical line emission located in the cores of X-ray lu…