Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Akimkin, Vitaly"'
Dust coagulation in protoplanetary disks is not straightforward and is subject to several slow-down mechanisms, such as bouncing, fragmentation and radial drift to the star. Furthermore, dust grains in UV-shielded disk regions are negatively charged
Externí odkaz:
http://arxiv.org/abs/2306.16408
Autor:
Silsbee, Kedron, Akimkin, Vitaly, Ivlev, Alexei V., Testi, Leonardo, Gong, Munan, Caselli, Paola
A big question in the field of star and planet formation is the time at which substantial dust grain growth occurs. The observed properties of dust emission across different wavelength ranges have been used as an indication that millimeter-sized grai
Externí odkaz:
http://arxiv.org/abs/2210.01832
Autor:
Smirnov-Pinchukov, Grigorii V., Molyarova, Tamara, Semenov, Dmitry A., Akimkin, Vitaly V., van Terwisga, Sierk, Francheschi, Riccardo, Henning, Thomas
Publikováno v:
A&A 666, L8 (2022)
Aims. With the large amount of molecular emission data from (sub)millimeter observatories and incoming James Webb Space Telescope infrared spectroscopy, access to fast forward models of the chemical composition of protoplanetary disks is of paramount
Externí odkaz:
http://arxiv.org/abs/2209.13336
Autor:
Getman, Konstantin V., Akimkin, Vitaly V., Arulanantham, Nicole, Kospal, Agnes, Semenov, Dmitry A., Smirnov-Pinchukov, Grigorii V., van Terwisga, Sierk E.
Publikováno v:
Research Notes of the AAS, Volume 6, Issue 3, id.64 (2022)
This work is part of a multi-wavelength program to study the effects of X-ray/UV/optical stellar radiation on the chemistry of the circumbinary disk around the young high-eccentricity binary DQ Tau. ALMA observations for near/around December 5, 2021
Externí odkaz:
http://arxiv.org/abs/2204.01824
Autor:
Vorobyov, Eduard, Skliarevskii, Aleksandr M., Molyarova, Tamara, Akimkin, Vitaly, Pavlyuchenkov, Yaroslav, Kóspál, Ágnes, Liu, Hauyu Baobab, Takami, Michihiro, Topchieva, Anastasiia
Luminosity bursts in young FU Orionis-type stars warm up the surrounding disks of gas and dust, thus inflicting changes on their morphological and chemical composition. In this work, we aim at studying the effects that such bursts may have on the spa
Externí odkaz:
http://arxiv.org/abs/2112.06004
Turbulence is the dominant source of collisional velocities for grains with a wide range of sizes in protoplanetary disks. So far, only Kolmogorov turbulence has been considered for calculating grain collisional velocities, despite the evidence that
Externí odkaz:
http://arxiv.org/abs/2106.09525
Autor:
Molyarova, Tamara, Vorobyov, Eduard I., Akimkin, Vitaly, Skliarevskii, Aleksandr, Wiebe, Dmitri, Güdel, Manuel
The snowlines of various volatile species in protoplanetary disks are associated with abrupt changes in gas composition and dust physical properties. Volatiles may affect dust growth, as they cover grains with icy mantles that can change the fragment
Externí odkaz:
http://arxiv.org/abs/2103.06045
The crucial initial step in planet formation is the agglomeration of micron-sized dust into macroscopic aggregates. This phase is likely to happen very early during the protostellar disc formation, which is characterised by active gas dynamics. We pr
Externí odkaz:
http://arxiv.org/abs/2010.06566
Publikováno v:
A&A 644, A4 (2020)
The widespread rings and gaps seen in the dust continuum in protoplanetary disks are sometimes accompanied by similar substructures seen in molecular line emission. One example is the outer gap at 100 au in AS 209, which shows that the H$_{13}$CO$^+$
Externí odkaz:
http://arxiv.org/abs/2009.09962
Autor:
Elbakyan, Vardan G., Johansen, Anders, Lambrechts, Michiel, Akimkin, Vitaly, Vorobyov, Eduard I.
Publikováno v:
A&A 637, A5 (2020)
We study the dynamics and growth of dust particles in circumstellar disks of different masses that are prone to gravitational instability during the critical first Myr of their evolution. The dust component is made up of two different components: mic
Externí odkaz:
http://arxiv.org/abs/2004.00126