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14 papers
Observation of CHOH and CHOH in Orion KL: A New Tool to Study Star-Formation History
Yoshimasa Watanabe, Takahiro Oyama, Akemi Tamanai +2
Methanol is a seed species of complex organic molecules that is of fundamental importance in astrochemistry. Although various isotopologues of CHOH have been detected in the in…
Dust mineralogy and variability of the inner PDS 70 disk
Hyerin Jang, Rens Waters, Till Kaeufer +17
The inner disk of the young star PDS 70 may be a site of rocky planet formation, with two giant planets detected further out. Solids in the inner disk may inform us about the origi…
Spectrometer Using superconductor MIxer Receiver (SUMIRE) for Laboratory Submillimeter Spectroscopy
Yoshimasa Watanabe, Yutaro Chiba, Takeshi Sakai +3
Recent spectroscopic observations by sensitive radio telescopes require accurate molecular spectral line frequencies to identify molecular species in a forest of lines detected. To…
Non-stoichiometric amorphous magnesium-iron silicates in circumstellar dust shells. Dust growth in outflows from supergiants
Hans-Peter Gail, Akemi Tamanai, Annemarie Pucci +1
We investigate the dust growth in oxygen-rich stellar outflows for a set of nine well-observed massive supergiants with optically thin dust shells. Models of the infrared emission…
Optical properties of non-stoichiometric amorphous silicates with application to circumstellar dust extinction
Akemi Tamanai, Annemarie Pucci, Ralf Dohmen +1
Optical constants of non-stoichiometric amorphous magnesium-iron silicates are determined. It is demonstrated that these can well reproduce the observed mid-infrared emission spect…
The twofold debris disk around HD 113766 A - Warm and cold dust as seen with VLTI/Midi and Herschel/Pacs
Johan Olofsson, Thomas Henning, Markus Nielbock +5
Warm debris disks are a sub-sample of the large population of debris disks, and display excess emission in the mid-IR. Around solar-type stars, very few objects show emission featu…