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Millimeter and submillimeter high angular resolution interferometric observations: dust in the heart of IRAS 18162-2048
circumstellar matter — ISM individual (GGD27, HH 80-81 IRAS 18162-2048)— stars
2010/11/12
The GGD27 complex includes the HH 80-81-80N system, which is one of the most powerful molecular outflows associated with a high mass star-forming region observed up to now. This outflow is powered by ...
Type-Ia supernovae: new clues to their progenitors from the delay-time distribution
supernovae general
2010/11/10
Despite their prominent role in cosmography, little is yet known about the nature of type-Ia supernovae (SNe Ia),from the identity of their progenitor systems, through the evolution of those systems u...
The Principal Parameters of Unstudied Open Clusters with NIR Observations
Principal Parameters of Unstudied Open Clusters NIR Observations
2010/11/15
We studied the principal parameters of some previously unstudied open star clusters using the JHK Near-IR photometry (2MASS survey). These clusters have been selected from the updated Catalogs of Dais...
Spectroscopic observations of a sample of dwarf spiral galaxies. II- Abundance gradients
dwarf spiral galaxies Abundance gradients
2010/11/10
The oxygen gradient of four dS galaxies has been determined using abundances for several
Hii regions determined with four different methods. The gradient slopes of the three non-barred
galaxies in t...
Probing the course of cosmic expansion with a combination of observational data
cosmic expansion combination of observational data
2010/11/16
We study the cosmic expansion history by reconstructing the deceleration parameter q(z)
from the SDSS-II type Ia supernova sample (SNIa) with two different light curve fits (MLCS2k2
and SALT-II), th...
A deep wide-field sub-mm survey of the Carina Nebula complex
A deep wide-field sub-mm Carina Nebula complex
2010/11/15
Context. The Great Nebula in Carina is one of the most massive (M∗,total >∼25 000 M⊙) star-forming complexes in our Galaxy and contains several stars with (initial) masses exceeding ≈ 100 ...
Cataclysmic Variables and Other Compact Binaries in the Globular Cluster NGC 362: Candidates from Chandra and HST
cataclysmic binaries close binary stars globular clusters X-ray binaries
2010/11/10
Highly sensitive and precise X-ray imaging from Chandra, combined with the superb spatial resolution of HST optical images, dramatically enhances our empirical understanding of compact binaries such a...
Australia Telescope Compact Array radio continuum 1384 and 2368 MHz Observations of Sgr B
center synchrotron radiation cosmic rays molecular clouds general molecular clouds
2010/11/11
We present images of the Sagittarius (Sgr) B giant molecular cloud at 2368 and 1384 MHz obtained using new, multi-configuration Australia Telescope Compact Array (ATCA) observations. We have combined ...
A Compact Early-type Galaxy at z = 0.6 Under a Magnifying Lens: Evidence For Inside-out Growth
galaxies elliptical and lenticular cD
2010/11/10
We use Keck laser guide star adaptive optics imaging and exploit the magnifying effects of strong gravitational lensing (the effective resolution is FWHM 200 pc) to investigate the sub-kpc scale of ...
We present the results of spectroscopy of 71 objects with steep and ultra-steep spectra (α < −0.9, S / ν ) from the“Big Trio” (RATAN-600–VLA–BTA) project, performed with the “Scorpio” spectrogra...
A Wide Field Survey of Satellite Galaxies around the Spiral Galaxy M106
galaxies；individual (M106) —galaxies；morphology and pho-tometry — galaxies；dwarf galaxies
2010/11/15
We present a wide field survey of satellite galaxies in M106 (NGC 4258)covering a 1.7◦ × 2◦ field around M106 using Canada-France-Hawaii Tele-scope/MegaCam. We find 16 satellite galaxy can...
Whole Earth Telescope Observations of the subdwarf B star KPD 1930+2752: A rich, short period pulsator in a close binary
stars general — oscillations individual(KPD1930+2752)
2010/11/9
KPD 1930+2752 is a short-period pulsating subdwarf B (sdB) star. It is also an ellip-soidal variable with a known binary period just over two hours. The companion is most likely a white dwarf and the ...
Two Wide Planetary-Mass Companions to Solar-Type Stars in Upper Scorpius
brown dwarfs planetary systems Infrared planetary systems
2010/11/12
At wide separations, planetary-mass and brown dwarf companions to solar type stars occupy a
curious region of parameters space not obviously linked to binary star formation or solar-system scale plan...
Characterizing Kepler Asteroseismic Targets
space vehicles Kepler – stars abundances – stars fundamental param-eters – stars binaries: spectroscopic
2010/11/11
Stellar structure and evolution can be studied in great detail by asteroseismic methods, provided data of high precision are available. We determine the effective temperature (Teff), surface gravity (...
Measuring the Galaxy Cluster Bulk Flow from WMAP data
Cosmology cosmic microwave background observations diffuse radiation
2010/11/15
We have looked for bulk motions of galaxy clusters in the WMAP 7 year data. We isolate the
kinetic Sunyaev-Zeldovich (SZ) signal by filtering the WMAP Q, V and W band maps with multifrequency matched...