Search Results - "Kama, Mihkel"
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Abundant Refractory Sulfur in Protoplanetary Disks
Published in The Astrophysical journal (10-11-2019)“…Sulfur is one of the most abundant elements in the universe, with important roles in astro-, geo-, and biochemistry. Its main reservoirs in planet-forming…”
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The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars. II. A Statistical Characterization of Class 0 and Class I Protostellar Disks
Published in The Astrophysical journal (20-02-2020)“…We have conducted a survey of 328 protostars in the Orion molecular clouds with the Atacama Large Millimeter/submillimeter Array at 0.87 mm at a resolution of…”
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An inherited complex organic molecule reservoir in a warm planet-hosting disk
Published in Nature astronomy (01-07-2021)“…Quantifying the composition of the material in protoplanetary disks is essential to determining the potential for exoplanetary systems to produce and support…”
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The TW Hya Rosetta Stone Project. III. Resolving the Gaseous Thermal Profile of the Disk
Published in The Astrophysical journal (01-02-2021)“…Abstract The thermal structure of protoplanetary disks is a fundamental characteristic of the system that has wide-reaching effects on disk evolution and…”
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The First Interferometric Measurements of NH2D/NH3 Ratio in Hot Corinos
Published in The Astrophysical journal (01-12-2022)“…The chemical evolution of nitrogen during star and planet formation is still not fully understood. Ammonia (NH3) is a key specie in the understanding of the…”
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The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars. IV. Unveiling the Embedded Intermediate-Mass Protostar and Disk within OMC2-FIR3/HOPS-370
Published in The Astrophysical journal (01-12-2020)“…Abstract We present ALMA (0.87 and 1.3 mm) and VLA (9 mm) observations toward the candidate intermediate-mass protostar OMC2-FIR3 (HOPS-370; L bol ∼ 314 L ⊙ )…”
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An ALMA Molecular Inventory of Warm Herbig Ae Disks. II. Abundant Complex Organics and Volatile Sulphur in the IRS 48 Disk
Published in The Astronomical journal (01-04-2024)“…Abstract The Atacama Large Millimeter/submillimeter Array (ALMA) can probe the molecular content of planet-forming disks with unprecedented sensitivity. These…”
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An ALMA Molecular Inventory of Warm Herbig Ae Disks. I. Molecular Rings, Asymmetries, and Complexity in the HD 100546 Disk
Published in The Astronomical journal (01-04-2024)“…Abstract Observations of disks with the Atacama Large Millimeter/submillimeter Array (ALMA) allow us to map the chemical makeup of nearby protoplanetary disks…”
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First Measurement of the 14N/15N Ratio in the Analog of the Sun Progenitor OMC-2 FIR4
Published in The Astrophysical journal (10-01-2018)“…We present a complete census of the 14N/15N isotopic ratio in the most abundant N-bearing molecules toward the cold envelope of the protocluster OMC-2 FIR4,…”
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Ariel planetary interiors White Paper
Published in Experimental astronomy (01-04-2022)“…The recently adopted Ariel ESA mission will measure the atmospheric composition of a large number of exoplanets. This information will then be used to better…”
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The TW Hya Rosetta Stone Project. II. Spatially Resolved Emission of Formaldehyde Hints at Low-temperature Gas-phase Formation
Published in The Astrophysical journal (01-01-2021)“…Formaldehyde (H2CO) is an important precursor to organics like methanol (CH3OH). It is important to understand the conditions that produce H2CO and prebiotic…”
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The TW Hya Rosetta Stone Project IV: A Hydrocarbon-rich Disk Atmosphere
Published in The Astrophysical journal (01-04-2021)“…Abstract Connecting the composition of planet-forming disks with that of gas giant exoplanet atmospheres, in particular through C/O ratios, is one of the key…”
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The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars. I. Identifying and Characterizing the Protostellar Content of the OMC-2 FIR4 and OMC-2 FIR3 Regions
Published in The Astrophysical journal (20-11-2019)“…We present Atacama Large Millimeter/submillimeter Array (0.87 mm) and Very Large Array (9 mm) observations toward OMC-2 FIR4 and OMC-2 FIR3 within the Orion…”
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Exploring the link between star and planet formation with Ariel
Published in Experimental astronomy (2022)“…The goal of the Ariel space mission is to observe a large and diversified population of transiting planets around a range of host star types to collect…”
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Planet gap-opening feedback on disc thermal structure and composition
Published in Monthly notices of the Royal Astronomical Society (01-01-2024)“…ABSTRACT (Exo-)planets inherit their budget of chemical elements from a protoplanetary disc. The disc temperature determines the phase of each chemical…”
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Iceline variations driven by protoplanetary disc gaps
Published in Monthly notices of the Royal Astronomical Society (02-05-2023)“…ABSTRACT The composition of forming planets is strongly affected by the protoplanetary disc’s thermal structure. This thermal structure is predominantly set by…”
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Imaging [CI] around HD 131835: reinterpreting young debris discs with protoplanetary disc levels of CO gas as shielded secondary discs
Published in Monthly notices of the Royal Astronomical Society (01-11-2019)“…ABSTRACT Despite being >10 Myr, there are ∼10 debris discs with as much CO gas as in protoplanetary discs. Such discs have been assumed to be ‘hybrid’, i.e…”
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Stellar photospheric abundances as a probe of discs and planets
Published in Monthly notices of the Royal Astronomical Society (01-06-2018)Get full text
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A precise asteroseismic age and metallicity for HD 139614: a pre-main-sequence star with a protoplanetary disc in Upper Centaurus–Lupus
Published in Monthly notices of the Royal Astronomical Society (01-04-2021)“…ABSTRACT HD 139614 is known to be a ∼14-Myr-old, possibly pre-main-sequence star in the Sco-Cen OB association in the Upper Centaurus-Lupus subgroup, with a…”
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High-resolution observations of molecular emission lines toward the CI Tau proto-planetary disc: planet-carved gaps or shadowing?
Published in Monthly notices of the Royal Astronomical Society (01-03-2021)“…ABSTRACT Recent observations have revealed that most proto-planetary discs show a pattern of bright rings and dark gaps. However, most of the high-resolution…”
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