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42 papers · 2 filters
The Initial Mass Function of the Orion Nebula Cluster across the H-burning limit
Nicola Da Rio, Massimo Robberto, Lynne A. Hillenbrand +2
We present a new census of the Orion Nebula Cluster (ONC) over a large field of view (>30'x30'), significantly increasing the known population of stellar and substellar cluster mem…
Light echoes reveal an unexpectedly cool Eta Carinae during its 19th-century Great Eruption
A. Rest, J. L. Prieto, N. R. Walborn +14
Eta Carinae (Eta Car) is one of the most massive binary stars in the Milky Way. It became the second-brightest star in the sky during its mid-19th century "Great Eruption," but the…
The Spectral Energy Distributions of White Dwarfs in 47 Tucanae: The Distance to the Cluster
K. A. Woodley, R. Goldsbury, J. S. Kalirai +13
We present a new distance determination to the Galactic globular cluster 47 Tucanae by fitting the spectral energy distributions of its white dwarfs to pure hydrogen atmosphere whi…
Water in star-forming regions with Herschel: highly excited molecular emission from the NGC 1333 IRAS 4B outflow
Gregory J. Herczeg, Agata Karska, Simon Bruderer +9
During the embedded phase of pre-main sequence stellar evolution, a disk forms from the dense envelope while an accretion-driven outflow carves out a cavity within the envelope. Hi…
Spitzer IRS Detection of Molecular Hydrogen Rotational Emission Towards Translucent Clouds
James G. Ingalls, T. M. Bania, F. Boulanger +3
Using the Infrared Spectrograph on board the Spitzer Space Telescope, we have detected emission in the S(0), S(1), and S(2) pure-rotational (v=0-0) transitions of molecular hydroge…
The effects of dust on the optical and infrared evolution of SN 2004et
J. Fabbri, M. Otsuka, M. J. Barlow +8
We present an analysis of multi-epoch observations of the Type II-P supernova SN 2004et. New and archival optical spectra of SN 2004et are used to study the evolution of the Halpha…