Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Ratzka, Thorsten"'
Autor:
Jamialahmadi, Narges, Ratzka, Thorsten, Panic, Olja, Fathivavsari, Hassan, Van Boekel, Roy, Flement, Sebastien, Hening, Thomas, Jaffe, Walter, Mulders, Gijs
We refine the gap size measurements of the disk surrounding the Herbig Ae star HD 100546 in the N band. Our new mid-infrared interferometric (MIDI) data have been taken with the UT baselines and span the full range of orientations. The correlated flu
Externí odkaz:
http://arxiv.org/abs/1808.05052
Autor:
Jamialahmadi, Narges, Lopez, Bruno, Berio, Philippe, Matter, Alexis, Flament, Sebastien, Fathivavsari, Hassan, Ratzka, Thorsten, Sitko, Mike L., Spang, Alain, Russell, R. W.
Studying the physical conditions structuring the young circumstellar disks is required for understanding the onset of planet formation. Of particular interest is the protoplanetary disk surrounding the Herbig star MWC480. The structure and properties
Externí odkaz:
http://arxiv.org/abs/1709.08921
Autor:
Daemgen, Sebastian, Todorov, Kamen, Silva, Jasmin, Hand, Derek, Garcia, Eugenio V., Currie, Thayne, Burrows, Adam, Stassun, Keivan G., Ratzka, Thorsten, Debes, John H., Lafreniere, David, Jayawardhana, Ray, Correia, Serge
Publikováno v:
A&A 601, A65 (2017)
We present new Keck/NIRC2 3$-$5 $\mu$m infrared photometry of the planetary-mass companion to ROXS 42B in $L^\prime$, and for the first time in Brackett-$\alpha$ (Br$\alpha$) and in $M_\mathrm{s}$-band. We combine our data with existing near-infrared
Externí odkaz:
http://arxiv.org/abs/1702.06549
Autor:
Currie, Thayne, Grady, Carol, Cloutier, Ryan, Konishi, Mihoko, Stassun, Keivan, Debes, John, van der Marel, Nienke, Muto, Takayuki, Jayawardhana, Ray, Ratzka, Thorsten
Using Keck/NIRC2 $L^\prime$ (3.78 $\mu m$) data, we report the direct imaging discovery of a scattered light-resolved, solar system-scale residual protoplanetary disk around the young A-type star HD 141569A, interior to and concentric with the two ri
Externí odkaz:
http://arxiv.org/abs/1602.01219
Publikováno v:
A&A 585, A100 (2016)
We investigate the variability of the brightness distribution and the changing density structure of the protoplanetary disk around DR Tau, a classical T Tauri star. DR Tau is known for its peculiar variations from the ultraviolet (UV) to the mid-infr
Externí odkaz:
http://arxiv.org/abs/1511.07590
Autor:
Zeidler, Peter, Preibisch, Thomas, Ratzka, Thorsten, Roccatagliata, Veronica, Petr-Gotzens, Monika G.
Publikováno v:
A&A 585, A49 (2016)
We performed a deep wide-field (6.76 deg^2) near-infrared survey with the VISTA telescope that covers the entire extent of the Carina nebula complex (CNC). The point-source catalog created from these data contains around four million individual objec
Externí odkaz:
http://arxiv.org/abs/1510.01631
Autor:
Currie, Thayne, Daemgen, Sebastian, Debes, John, Lafreniere, David, Itoh, Yoichi, Jayawardhana, Ray, Ratzka, Thorsten, Correia, Serge
We present near-infrared high-contrast imaging photometry and integral field spectroscopy of ROXs 42B, a binary M0 member of the 1--3 Myr-old $\rho$ Ophiuchus star-forming region, from data collected over 7 years. Each data set reveals a faint compan
Externí odkaz:
http://arxiv.org/abs/1310.4825
Autor:
Mulders, Gijs D., Paardekooper, Sijme-Jan, Panić, Olja, Dominik, Carsten, van Boekel, Roy, Ratzka, Thorsten
Giant planets form in protoplanetary disks while these disks are still gas-rich, and can reveal their presence through the annular gaps they carve out. HD 100546 is a gas-rich disk with a wide gap between between a radius of ~1 and 13 AU, possibly cl
Externí odkaz:
http://arxiv.org/abs/1306.4264
The Mysterious Sickle Object in the Carina Nebula: A stellar wind induced bow shock grazing a clump?
Optical and near-infrared images of the Carina Nebula show a peculiar arc-shaped feature, which we call the "Sickle", next to the B-type star Trumpler 14 MJ 218. We use multi-wavelength observations to explore and constrain the nature and origin of t
Externí odkaz:
http://arxiv.org/abs/1304.6520