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1901. http://www.mso.anu.edu.au/seminars/abstracts/20160401-1400.html
The standard cosmological model currently fits a wide range of data spectacularly well. In fact so well that much attention is focussed on finding any small deviations from this model. In terms of the cosmic microwave background such features are often referred to as "anomalies" - there are several of them described in the literature. They might represent smoking guns for fundamental changes in our picture of high energy physics, or they might just be statistical flukes. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160401-1400.html -- 4.3 Кб -- 10.04.2016
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1902. http://www.mso.anu.edu.au/seminars/abstracts/20160331-1100.html
Stellar astrophysics has entered a new golden age, thanks to wonderfully precise measurements being returned by NASA s Kepler mission. Kepler is a 0.9-metre space telescope that has been monitoring the brightness of more than 100,000 stars with extraordinary accuracy for more than four years. ... The mission has been spectacularly successful, with thousands of candidates reported. ... Key results include detecting gravity modes in red giant stars and characterizing stars found to host exoplanets. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160331-1100.html -- 4.6 Кб -- 10.04.2016
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1903. http://www.mso.anu.edu.au/seminars/abstracts/20160329-1100.html
... This implies powerful stability and collimation taking into account that different instabilities can affect the evolution of jets. ... Thus, jet stability has been a significant research subject during the last decades. In this talk, I will present some recent results on the linear and non-linear stability analysis of non-relativistic magnetized jets carrying helical magnetic fields. ... I will discuss the non-linear evolution of jets with the aid of three-dimensional numerical simulations. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160329-1100.html -- 4.8 Кб -- 10.04.2016
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1904. http://www.mso.anu.edu.au/seminars/abstracts/20160324-1100.html
. TBD .
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160324-1100.html -- 3.7 Кб -- 10.04.2016
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1905. http://www.mso.anu.edu.au/seminars/abstracts/20160317-1100.html
The mass of a star is arguably its most fundamental parameter and for red giant stars it implies a stellar evolution age. Stellar masses and ages have never been derived directly from spectra of red giants. However, using the APOGEE Kepler sample of stars (the APOKASC sample), with high-quality spectra and asteroseismic masses, we have built a data-driven spectral model using THE CANNON (arXiv:1501.07604) to infer stellar age from spectra. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160317-1100.html -- 4.5 Кб -- 10.04.2016
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1906. http://www.mso.anu.edu.au/seminars/abstracts/20160315-1100.html
... The major current candidates are ordinary core-collapse supernovae and neutron star merger. ... Previously, extremely low levels of neutron-capture elements were found in the metal-poor stars in ultra-faint dwarf galaxies which supported supernovae as the r-process site. ... This would be the first signature of a neutron star merger in the early universe which holds the key to finally identifying the r-process production site. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160315-1100.html -- 5.4 Кб -- 10.04.2016
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1907. http://www.mso.anu.edu.au/seminars/abstracts/20160310-1100.html
The deferred photometric pipeline of SNLS uses only photometry to detect and classify type Ia supernovae (SNe Ia). The advantages of a photometric sample include larger number of events classified as type Ia, larger redshift coverage and no need for spectroscopic observations. ... First, a subtracted image stack treatment was developed to reduce the number of non SN-like events using morphological component analysis. ... Second, a new classification using photometric SN redshifts is introduced. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160310-1100.html -- 4.9 Кб -- 10.04.2016
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1908. http://www.mso.anu.edu.au/seminars/abstracts/20160308-1100.html
Pulsars are great probes for exploring theories of gravitation and detection of gravitational waves. Observations of binary pulsar systems, particularly the Double Pulsar system, have provided the most stringent tests of relativistic gravity in strong-field situations, confirming the accuracy of EinsteinТЙs general theory of relativity. Pulsar Timing Arrays (PTAs) have as a main aim the detection and study of nanohertz gravitational waves (GWs). ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160308-1100.html -- 4.5 Кб -- 10.04.2016
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1909. http://www.mso.anu.edu.au/seminars/abstracts/20160304-1400.html
The radial distribution of metallicity of star-forming galaxies in a galaxy cluster can inform us about the mass assembly and enrichment history of the galaxy cluster. ... Both galaxy clusters are cool-core clusters at redshift z т?? ... The gas-phase metallicity of star- forming galaxies in MACS1115+01 exhibit anti-correlation with projected distance т??0.15 ТБ 0.08 dex/Mpc, whereas the radial metallicity distribution of RXJ1532+30 is statistically flat (т??0.09 ТБ 0.12 dex/Mpc). ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160304-1400.html -- 5.7 Кб -- 10.04.2016
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1910. http://www.mso.anu.edu.au/seminars/abstracts/20160301-1100.html
Since the first stars and then galaxies formed the Universe has been an immense factory converting neutral gas into stellar material. ... In this seminar I will discuss recent results from the Galaxy And Mass Assembly (GAMA) survey, probing the assembly of stellar mass though both in-situ star formation (as traced by multiple SFR indicators) and interactions (both mergers and interaction induced star-formation) - in galaxies spanning ~4 decades in stellar mass. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160301-1100.html -- 5.5 Кб -- 10.04.2016
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1911. http://www.mso.anu.edu.au/seminars/abstracts/20160226-1400.html
. The briefing on the Defence Trade Control Act will be about the Act itself and how it may potentially impact research activity in RSAA (20 mins). Following this discussion, researchers who consider their work has no exposure to Act are free to leave. The second 40 minutes will explore more closely those areas where researchers believe their work may have potential exposure.
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160226-1400.html -- 4.1 Кб -- 10.04.2016
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1912. http://www.mso.anu.edu.au/seminars/abstracts/20160225-1100.html
... Here I will briefly describe some of the key surveys taking place, the distinction between cosmology and galaxy evolution studies and an update of where we are in terms of mapping the Universe (and whether weтАЩre likely to run out of Universe anytime soon). IтАЩll then focus on science from the GAMA project, very briefly summarising some of the key results from the first 100 papers, before focussing on where we are with the mass and energy census in the Universe. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160225-1100.html -- 5.0 Кб -- 10.04.2016
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1913. http://www.mso.anu.edu.au/seminars/abstracts/20160219-1400.html
. TBD .
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160219-1400.html -- 3.7 Кб -- 10.04.2016
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1914. http://www.mso.anu.edu.au/seminars/abstracts/20160218-1100.html
The SAMI instrument on the AAT is currently taking integral field spectroscopy of ~3000 nearby galaxies as part of the SAMI Galaxy Survey. This is the largest sample ever across a broad range in both stellar mass and environment (from field galaxies to groups to clusters). Based on ionised gas and stellar kinematics in the SAMI galaxies, I will discuss the relationship between dynamical misalignments and the influence of environment, morphology and timescales on the origin of gas in galaxies. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160218-1100.html -- 4.7 Кб -- 10.04.2016
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1915. http://www.mso.anu.edu.au/seminars/abstracts/20160212-1400.html
. Over the last two years, we ve developed and run a set of four astrophysics MOOCs (Massive Open Online Courses), offered for free to anyone in the world who wants to take them. Around a quarter of a million students from 180 countries have enrolled in the courses - considerably more than have graduated from the ANU science it was founded. I ll present the lessons learned from this experience.
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160212-1400.html -- 4.1 Кб -- 10.04.2016
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1916. http://www.mso.anu.edu.au/seminars/abstracts/20160211-1100.html
We addressed strictly line-by-line differential abundance analysis using high resolution, high signal-to-noise ratio spectra on field stars (e.g., stellar binaries, terrestrial planet hosts etc.) and open cluster stars (e.g., the Hyades stars) in order to seek for and test the possible chemical signatures of planet formation. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160211-1100.html -- 4.5 Кб -- 10.04.2016
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1917. http://www.mso.anu.edu.au/seminars/abstracts/20160209-1100.html
The bulge is one of the oldest, yet very metal-rich Galactic components suggesting that it experienced early, rapid chemical enrichment. Yet, the first, metal-poor stars to have formed in the Universe are predicted to be found in this central region of the Milky Way. ... The chemical abundances of our candidates (at [Fe/H] of -1.5 to -2.6 dex) vastly overlap with those of halo stars and our sample also contains one CEMP-s and a CH-star - the first detections of such objects in the bulge. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160209-1100.html -- 4.6 Кб -- 10.04.2016
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1918. http://www.mso.anu.edu.au/seminars/abstracts/20160205-1400.html
To celebrate the impending start of the Super Rugby season, IтАЩll spend a short while describing some of the more interesting aspects of the physics of rugby union. Hopefully IтАЩll manage to convince you all that not only is rugby union a fascinating sport, but there are lots of opportunities to use some of the more out-of-left-field applications of physics in developing teaching and lesson plans for high school and undergraduate students. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20160205-1400.html -- 4.3 Кб -- 10.04.2016
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1919. http://www.mso.anu.edu.au/seminars/abstracts/20151218-1400.html
Space debris is a serious and growing threat to operating spacecraft. Potential debris collisions with satellites are becoming increasingly likely and can cause economic loss of between $25 million and $500 million per event. ... National and international partners include EOS Space Systems, Lockheed Martin Space Systems (US), Optus Satellite Systems, the Australian National University, RMIT University and the National Institute of Information and Communication s Technology (Japan) . ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20151218-1400.html -- 4.6 Кб -- 10.04.2016
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1920. http://www.mso.anu.edu.au/seminars/abstracts/20151216-1100.html
Subaru Telescope is an 8.2m telescope on top of Maunakea, Hawaii. The telescope has suites of state-of-art instruments which cover almost entire wavelength range in optical to mid-infrared and various spectral resolutions. We will briefly introduce some scientific highlights using Subaru Telescope to show its capabilities. Recently a new prime focus optical imager Hyper Suprime-Cam (HSC) started its science operations. ...
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Ссылки http://www.mso.anu.edu.au/seminars/abstracts/20151216-1100.html -- 4.8 Кб -- 10.04.2016
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