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Probing the Ionization Rate of Molecular Hydrogen Near the Galactic Center

Probing the Ionization Rate of Molecular Hydrogen Near the Galactic Center

by Anna Rosen | May 28, 2013 | Daily Paper Summaries

In this article, the authors measure the cosmic ray ionization rate within a few parsecs of the galactic center. They find that the cosmic ray ionization rate is an order of magnitude larger than the galactic standard and also that the molecular gas near the galactic center is much warmer than the typical galactic molecular cloud.

The Infamous Galactic Center Source G2: Gas Cloud or Star?

The Infamous Galactic Center Source G2: Gas Cloud or Star?

by Anna Rosen | Apr 25, 2013 | Daily Paper Summaries

In this paper, the authors use near-IR imaging and spectroscopy to determine if G2, a galactic center source about to approach our galaxy’s supermassive black hole, is a gas cloud or a star.

Tracking the Chemical Evolution of Galaxies Over the Last 11 Billion Years

Tracking the Chemical Evolution of Galaxies Over the Last 11 Billion Years

by Anna Rosen | Apr 3, 2013 | Daily Paper Summaries

In this article, the authors measure the stellar mass-metallicity relation for star forming galaxies ranging to z~2.3. They find that mass-metallicity relationship for these galaxies evolves with time and also that it flattens at late times.

The Importance of Optically Thick Disks Around Massive Stars

The Importance of Optically Thick Disks Around Massive Stars

by Anna Rosen | Dec 5, 2012 | Daily Paper Summaries

In this article, the authors study the effects of an optically thick disk around a forming massive protostar and examine how treating the gas opacity in the innermost dust-free region correctly affects the overall formation of massive stars.

Observational Signatures of Accretion Induced Collapse of White Dwarfs

Observational Signatures of Accretion Induced Collapse of White Dwarfs

by Anna Rosen | Nov 8, 2012 | Daily Paper Summaries

A massive white dwarf accreting from a companion can lead to accretion induced collapse turning the white dwarf into a neutron star – how can such an event be observed?

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