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48 papers · 2 filters
Gas structure inside dust cavities of transition disks: Oph IRS 48 observed by ALMA
Simon Bruderer, Nienke van der Marel, Ewine F. van Dishoeck +1
(Abridged) Transition disks are recognized by the absence of emission of small dust grains inside a radius of up to several 10s of AUs. Due to the lack of angular resolution and se…
A recent accretion burst in the low-mass protostar IRAS 15398-3359: ALMA imaging of its related chemistry
Jes K. Jorgensen, Ruud Visser, Nami Sakai +8
Low-mass protostars have been suggested to show highly variable accretion rates through-out their evolution. Such changes in accretion, and related heating of their ambient envelop…
Far-infrared molecular lines from Low- to High-Mass Star Forming Regions observed with Herschel
A. Karska, F. Herpin, S. Bruderer +13
(Abridged) We study the response of the gas to energetic processes associated with high-mass star formation and compare it with studies on low- and intermediate-mass young stellar…
Morphologies of protostellar outflows: An ALMA view
Thomas Peters, Pamela D. Klaassen, Daniel Seifried +2
The formation of stars is usually accompanied by the launching of protostellar outflows. Observations with the Atacama Large Millimetre/sub-millimetre Array (ALMA) will soon revolu…
ALMA continuum observations of a 30 Myr old gaseous debris disk around HD 21997
A. Moór, A. Juhász, Á. Kóspál +10
Circumstellar disks around stars older than 10 Myr are expected to be gas-poor. There are, however, two examples of old (30-40 Myr) debris-like disks containing a detectable amount…
ALMA observations of the molecular gas in the debris disk of the 30 Myr old star HD 21997
Á. Kóspál, A. Moór, A. Juhász +9
The 30 Myr old A3-type star HD 21997 is one of the two known debris dust disks having a measurable amount of cold molecular gas. With the goal of understanding the physical state,…