Showing 2011 · astro-ph.SRShow all

12 papers · 2 filters

astro-ph.SR2011

Analysis of Hydrogen Cyanide Hyperfine Spectral Components towards Star Forming Cores

Robert M. Loughnane, Matt P. Redman, Eric R. Keto +2

Although hydrogen cyanide has become quite a common molecular tracing species for a variety of astrophysical sources, it, however, exhibits dramatic non-LTE behaviour in its hyperf…

astro-ph.SR2011★ 51 cited

The Circumstellar Environment of R Coronae Borealis: White Dwarf Merger or Final Helium Shell Flash?

Geoffrey C. Clayton, Ben E. K. Sugerman, S. Adam Stanford +21

In 2007, R Coronae Borealis (R CrB) went into an historically deep and long decline. In this state, the dust acts like a natural coronagraph at visible wavelengths, allowing faint…

astro-ph.SR2011★ 46 cited

Photometry of Variable Stars from Dome A, Antarctica

Lingzhi Wang, Lucas M. Macri, Kevin Krisciunas +18

Dome A on the Antarctic plateau is likely one of the best observing sites on Earth thanks to the excellent atmospheric conditions present at the site during the long polar winter n…

astro-ph.SR2011★ 35 cited

The Dust Properties of Two Hot R Coronae Borealis Stars and a Wolf-Rayet Central Star of a Planetary Nebula: in Search of a Possible Link

Geoffrey C. Clayton, O. De Marco, B. A. Whitney +14

We present new Spitzer/IRS spectra of two hot R Coronae Borealis (RCB) stars, one in the Galaxy,V348 Sgr, and one lying in the LMC, HV 2671. These two objects may constitute a link…

astro-ph.SR2011★ 44 cited

FIRE Spectroscopy of Five Late-type T Dwarfs Discovered with the Wide-field Infrared Survey Explorer

Adam J. Burgasser, Michael C. Cushing, J. Davy Kirkpatrick +12

We present the discovery of five late-type T dwarfs identified with the Wide-field Infrared Survey Explorer (WISE). Low-resolution near-infrared spectroscopy obtained with the Mage…

astro-ph.SR2011★ 88 cited

The properties of the T8.5p dwarf Ross 458C

Ben Burningham, S. K. Leggett, D. Homeier +12

We present near-infrared photometry and spectroscopy, and warm-Spitzer IRAC photometry of the young very cool T dwarf Ross 458C, which we have typed as T8.5p. By applying the fiduc…

astro-ph.SR2011★ 25 cited

The discovery of the T8.5 dwarf UGPS J0521+3640

Ben Burningham, P. W. Lucas, S. K. Leggett +15

We have carried out a search for late-type T dwarfs in the UKIDSS Galactic Plane Survey 6th Data Release. The search yielded two persuasive candidates, both of which have been conf…

astro-ph.SR2011★ 3 cited

Are the infrared-faint radio sources pulsars?

A. D. Cameron, M. J. Keith, G. Hobbs +3

Infrared-Faint Radio Sources (IFRS) are objects which are strong at radio wavelengths but undetected in sensitive Spitzer observations at infrared wavelengths. Their nature is unce…

astro-ph.SR2011★ 62 cited

Disk Evolution in OB Associations - Deep Spitzer/IRAC Observations of IC 1795

Veronica Roccatagliata, Jeroen Bouwman, Thomas Henning +5

We present a deep Spitzer/IRAC survey of the OB association IC 1795 carried out to investigate the evolution of protoplanetary disks in regions of massive star formation. Combining…

astro-ph.SR2011★ 16 cited

Modelling the near-IR spectra of Jupiter using line-by-line methods

Lucyna Kedziora-Chudczer, Jeremy Bailey

We have obtained long-slit, infrared spectra of Jupiter with the Anglo Australian Telescope in the K and H bands at a resolving power of 2260. Using a line-by-line, radiative trans…

astro-ph.SR2011★ 54 cited

Blue not brown: UKIDSS T dwarfs with suppressed K-band flux

D. N. Murray, B. Burningham, H. R. A Jones +13

We have used blue near-infrared colours to select a group of 12 spectroscopically-confirmed UKIDSS T dwarfs later than T4. From amongst these we identify the first two kinematic ha…

astro-ph.SR2011★ 20 cited

GALEX and Optical Observations of GW Librae During the Long Decline from Superoutburst

Eric Bullock, Paula Szkody, Anjum S. Mukadam +14

The prototype of accreting, pulsating white dwarfs (GW Lib) underwent a large amplitude dwarf nova outburst in 2007. We used ultraviolet data from GALEX and ground-based optical ph…