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Autor:
Wright, Christopher, Maddison, Sarah, Wilner, David, Burton, Michael, Lommen, Dave, van Dishoeck, Ewine, Pinilla, Paola, Bourke, Tyler, Menard, Francois, Walsh, Catherine
There is much evidence that planet formation is occurring in the disk around the Herbig Be star HD100546. To learn more about the processes occurring in this disk we conducted high resolution imaging at 43/45 GHz with the Australia Telescope Compact
Externí odkaz:
http://arxiv.org/abs/1506.01147
Autor:
Ubach, Catarina, Maddison, Sarah T., Wright, Christopher M., Wilner, David J., Lommen, Dave J. P., Koribalski, Baerbel
Publikováno v:
2012, MNRAS, 425, 3137-3161
We present ATCA results of a 3 and 7 mm continuum survey of 20 T Tauri stars in the Chamaeleon and Lupus star forming regions. This survey aims to identify protoplanetary discs with signs of grain growth. We detected 90% of the sources at 3 and 7 mm,
Externí odkaz:
http://arxiv.org/abs/1207.0260
Autor:
Lommen, Dave J. P., van Dishoeck, Ewine F., Wright, Chris M., Maddison, Sarah T., Min, Michiel, Wilner, David J., Salter, Demerese M., van Langevelde, Huib Jan, Bourke, Tyler L., van der Burg, Remco F. J., Blake, Geoffrey A.
Young stars are formed within dusty discs. The grains in the disc are originally of the same size as interstellar dust. Models predict that these grains will grow in size through coagulation. Observations of the silicate features at micron wavelength
Externí odkaz:
http://arxiv.org/abs/1004.0158
Autor:
Jorgensen, Jes K., van Dishoeck, Ewine F., Visser, Ruud, Bourke, Tyler L., Wilner, David J., Lommen, Dave, Hogerheijde, Michiel R., Myers, Philip C.
The key question about early protostellar evolution is how matter is accreted from the large-scale molecular cloud, through the circumstellar disk onto the central star. A sample of 20 Class 0 and I protostars has been observed in continuum at (sub)m
Externí odkaz:
http://arxiv.org/abs/0909.3386
Autor:
Lommen, Dave, Maddison, Sarah, Wright, Chris, van Dishoeck, Ewine, Wilner, David, Bourke, Tyler
Grains in disks around young stars grow from interstellar submicron sizes to planetesimals over the course of several Myr. Thermal emission of large grains or pebbles can be best observed at cm wavelengths. However, other emission mechanisms can cont
Externí odkaz:
http://arxiv.org/abs/0812.3849
(abbreviated) We aim to determine the masses of the envelopes, disks, and central stars of young stellar objects (YSOs) in the Class I stage. We observed the embedded Class I objects IRS 63 and Elias 29 in the rho Ophiuchi star-forming region with th
Externí odkaz:
http://arxiv.org/abs/0801.3569
Autor:
Lommen, Dave, Wright, Chris M., Maddison, Sarah T., Jorgensen, Jes K., Bourke, Tyler L., van Dishoeck, Ewine F., Hughes, Annie, Wilner, David J., Burton, Michael, van Langevelde, Huib Jan
CONTEXT - Low-mass stars form with disks in which the coagulation of grains may eventually lead to the formation of planets. It is not known when and where grain growth occurs, as models that explain the observations are often degenerate. A way to br
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610667
Cygnus X-3 is a strong X-ray source (L_X about 10^38 erg/s) which is thought to consist of a compact object, accreting matter from a helium star. We find analytically that the estimated ranges of mass-loss rate and orbital-period derivative for Cyg X
Externí odkaz:
http://arxiv.org/abs/astro-ph/0507304
We analyse ~ 360 ks of archival data from the Rossi X-Ray Timing Explorer (RXTE) of the 21 hr orbital period dipping low-mass X-ray binary 4U 1624-49. We find that outside the dips the tracks in the colour-colour and hardness-intensity diagrams (CDs
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502558