1206.2919
CLaSPS: a new methodology for knowledge extraction from complex astronomical dataset
D'Abrusco, et al
CLaSPS = Cluster-Labels-Score Patterns Spotter: methodology for the determination of correlations among astronomical observables in complex datasets, based on the application of distinct unsupervised clustering techniques.
1206.2922
The tidal disruption of giant stars and their contribution to the flaring supermassive black hole population
MacLeod, Guillochon, Ramirez-Ruiz
Calculate flares from tidal disruption of (evolved) stars (which are more disrupted) due to a nearby SMBH.
1206.2923
Upper limit on the cosmological Gamma-ray background
Inoue, Ioka
Upper limit estimated from <100 GeV measurements of EGB, based on EM cascade emission from VHE EGB interacting with CMB-to-optical background radiation which fits well, but adding contribution from known source classes, the Fermi VHE EGB observation exceeds the limit. Measurement of upper limit at >100 GeV is useful in the future to probe the EGB origin, perhaps even new physics.
1206.2924
Cosmic strings as emitters of extremely high energy neutrinos
Lunardini, Sabancilar
Study massive particle radiation from cosmic string kinks and its observability in HE neutrinos.
1206.2925
The heating of dust by old stellar populations in the Bulge of M31
Groves, et al
Show that dust heating is mostly by optical and not UV (i.e., old stellar population can heat dust); the central temperature rises from 17 to 35K at the center of Andromeda. (UV optically thin.)
1206.2926
The effective field theory of cosmological large scale structures
Carrasco, Hertzberg, Senatore
Make precise analytical predictions on large scales of LSS: develop an effective field theory formulated in terms of an IR effective fluid (strongly coupled in UV and weakly coupled in the IR) characterized by several parameters, such as speed of sound and viscosity. Parameters are measured from N-body simulations. The fluid describes all the relevant physics at long scales k and permits a manifestly convergent perturbative expansion in the size of matter perturbations \delta(k) for all the observables. Better agreement with observation than standard perturbation theory (precent precision up to k~0.24 h/Mpc).
1206.2936
Image properties of embedded lenses
Kantowski, Chen, Dai
Embedded lens (objects seen around point mass lenses) are more realistic wrt conventional linear superposition theory. Embedding reduces the range of gravitational force acting on passing light beams, altering deflection angles, amplifications, shears and EInstein ring sizes.
1206.2939
Constraints on the topology of the Universe: extension to general geometries
Vaudrevange, Starkman, Cornish, Spergel
WMAP7 show no matching circles, indicating non-trivial geometry.
1206.2950
AGNs as main contributors to the uV ionizing emissivity at high redshifts: predictions from a Lambda-CDM model with linked AGN/galaxy evolution
Giallongo et al
Evaluate contribution of AGN population to the ionization history of the Universe based on a semi-analytic model of galaxy formation and evolution in LCDM; based on blast-wave model for AGN feedback from a previous paper. Model agrees well with z=0 and z=3, but overestimates UV radiation for z>5. Suggests reconsider the role of the AGNs as the main driver of the ionization history of the universe [the last sentence not clear--AGN is considered the main driver, but it shouldn't, I guess.]
1206.2951
On the significance of absorption features in HST/COS data
Keeney et al
HST COS far-UV spectra significance "scaling relations" [?]; single exposures more Poissonian than coadded data.
1206.2982
Using the Parkes Pulsar Data Archive
Khoo et al
As the title says.
1206.2987
The multwavelength study of the infrared dust bubble S51
Zhang, Wang
Look for evidence of triggered SF in IR dust bubble. Several young stellar objects are distributed along an arc-shaped structure near S51 shell, that may represent a second generation of stars whose formation was triggered by the bubble expanding into the molecular gas.
1206.2989
Spatially resolved stellar, dust and gas properties of the post-interacting Whirlpool Galaxy system
Cooper et al
Use Herschel IR data with archival optical NIR and MIR and SED modelling to infer dust properties and SF (a burst ~370-480 Myr ago). log (Mdust/Mstar) = -2.5 and -3.5; while gas-to-dust mass ratio is 94pm17, relatively constant across the galaxy (as well as the dust). Dust is heated to 30K, but no apparent source of heating.
1206.2996
Speckle control with a remapped-pupil PIAA-coronoagraph
Martinache et al
Speckle imaging: aka "video astronomy", describes a range of high-resolution astronomical imaging techniques based either on the shift-and-add (image stacking) or on speckle interferometry methods. These techniques can dramatically increase the resolution of ground-based telescopes.
Demonstrate complete spekle control loop with one PIAA coronagraph. Remapping optics transparent to wavefront control algorithm, and hence can be employed without modelling remapping. Coronagraph compatible with simple implementation of speckle nulling technique.
1206.3028
Hydro-chemical study of the evolution of insterstellar pre-biotic molecules during the collapse of molecular clouds
Majumdar, Das, Chakrabarti, Chakrabarti
Evolution of interstellar molecules: Formation routs of the pre-biotic molecules are found to be highly dependent on the abundances of the reactive species and the rate coefficients involved in the reactions. Presence of grains strongly affect the abundances of the gas phase species. Comparative study between different pathways available for the synthesis of adenine, alanine, glycine and other molecules.
1206.3042
On the origin of the Almahata-Sitta meteorite and 2008TC3 asteroid
Gayon-Markt, Delbo, Morbidelli, Marchi
Near Earth Asteroid impacted earth on 2008 Oct 7, 600 fragments recovered. Composition heterogeneous (ureilites, H, L, and E chondrites), likely source is in the inner Main Belt at low inclination. Possible scenario of formation of 2008TC3: little chance that 2008TC3 was formed by low velocity collisions between asteroids of different mineralogies in the current asteroid belt; more likely that heterogeneous composition inherited from a time when the asteroid belt was in a different dynamical state, most likely in the very early Solar system (ureilites are fragments of a large, thermally metamorphosed asteroid), suggesting that the phases of collisional erosion and accretion overlapped for some time in the primordial asteroid belt.
1206.3048
The A-X infrared bands of Aluminum Oxide in stars: search and new detections
Banerjee et al
A-X bands are fairly prevalent in sources with low temperature and O-rich environments, although not generally common. Role of AlO in alumna dust formation, scope for estimating the radioactive 26Al content in AGB stars, possible targets for further mm/radio studies of AlO in as also seen in mm wavelengths.
1206.3059
The GALEX Arecibo SDSS survey. VI. second data release and updated gas fraction scaling relations
Catinella et al
GASS: ongoing large Arecibo program to measure the HI properties for an unbiased sample of ~1000 galaxies with stellar masses greater than 10^10 Msun and 0.025<z<0.05. GASS targets selected from SDSS spectro sample and GALEX imaging surveys, and are observed until detected or until a gas mass fraction limit of a few per cent is reached. Survey 50% complete, present catalogues. Revisit main scaling relations of HI mass fraction with galaxy stellar mass, M* surface density, c, and NUV-r color, and gas fraction plane.
1206.3060
Evidences of merging in the Seyfert galaxy NGC 3393 revealed by modelling the spectra
Contini
Merger event: look for other evidences of collision. Find (gas?) densities higher than x10 of other AGN galaxies, Mg/H depletion a bit high, indicate mixing with external matter during collision. WR stars could be created b galaxy collision in the central region.
1206.3076
Cold positrons from decaying dark matter
Boubekeur, Dodelson, Vives
If one of DM decay product is a positron, it will cool via CMB collision then annihilate in galactic potential wells. The resulting flux places constraints on this class of models, could be consistent with INTEGRAL observation.
1206.3123
Forecasting cosmological parameter constraints from near-future space-based galaxy surveys
Pavlov, Samushia, Ratra
Investigate how well these future data will be able to constrain the time dependence of the DE density, with some exotic cosmologies (XCDM, omegaCDM, phiCDM). Constrain to 10% if flat cosmology assumed, and order of magnitude better than current data sets.
1206.3124
X-ray pulsars: a review
Caballero, Wilms
X-ray pulsars are among the most luminous objects in the X-ray sky. General properties of accreting X-ray binaries presented (emphasis on spectral characteristics). Current and future prospects.
1206.3127
Unveiling the secrets of gamma ray bursts
Gomboc
Introduction to Gamma ray bursts: GRBs = death of stars in other galaxies.
1206.3132
CRPropa 2.0 -- a public framework for propagating high energy nuclei, secondary gamma rays and neutrinos
Kampert et al
Public software to model the extra-galactic propagation of ultra-high energy nuclei of Z<26 through structured B fields and ambient photon backgrounds taking into account all relevant particle interactions.
1206.3153
The bimodal colors of Centaurs and small kuiper belt objects
Peixinho et al
Bimodal surface colors of Centaurs observed, but KBOs do not. Bimodal behavior is a size-related phenomenon, independent of dynamical classification, common to Centaurs and small KBOs. Large KBOs also have bimodality, but distinct from the small objects and strongly dependent on the Haumea collisional family objects.
1206.3173
Anomalously weak solar convection
Hanasoge et al
Observations of the wavefield in the solar photosphere using time-distance helioseismology to image flows in the solar interior. Within l<60, convective velocities are 20-100 times weaker than theoretical estimates. What mechanism transports the heat flux? The Sun may be a much faster rotator than previously thought; large-scale convection may be quasi-geostrophic. Presence of a latitudinal entropy gradient suggested.
1206.3185
Mass flow rates in and outflow rates from AGN accretion disks
Blank, Duschl
Connect basic properties of outflows with those of the accretion flow, from deriving expressions for the mass flow rates in and from accretion disks, with Eddington limit.
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