114 citations · 290 across the 10 of their papers we have counts for
10 papers
Ammonia masers toward G358.931-0.030
T. P. McCarthy, S. L. Breen, J. F. Kaczmarek +9
We report the detection of ammonia masers in the non-metastable (6, 3), (7, 5) and (6, 5) transitions, the latter is the first unambiguous maser detection of that transition ever m…
Optical properties and dust temperatures in clumpy diffuse medium
Andrei B. Ostrovskii, S. Yu. Parfenov, A. I. Vasyunin +2
In this study, we explore the impact of inhomogeneities in the spatial distribution of interstellar dust on spatial scales of au caused by ion shadowing forces on the optica…
First Detection of the Simplest Organic Acid in a Protoplanetary Disk
Cécile Favre, Davide Fedele, Dmitry Semenov +14
The formation of asteroids, comets and planets occurs in the interior of protoplanetary disks during the early phase of star formation. Consequently, the chemical composition of th…
On the methanol emission detection in the TW Hya disc: the role of grain surface chemistry and non-LTE excitation
S. Yu. Parfenov, D. A. Semenov, Th. Henning +3
The recent detection of gas-phase methanol (CHOH) lines in the disc of TW Hya by Walsh et al. provided the first observational constraints on the complex O-bearing organic cont…
Large-scale magnetic field in the accretion discs of young stars: the influence of magnetic diffusion, buoyancy and Hall effect
Sergey A. Khaibrakhmanov, Alexander E. Dudorov, Sergey Yu. Parfenov +1
We investigate the fossil magnetic field in the accretion and protoplanetary discs using the Shakura and Sunyaev approach. The distinguishing feature of this study is the accurate…
Towards detecting methanol emission in low-mass protoplanetary discs with ALMA: The role of non-LTE excitation
S. Yu. Parfenov, D. A. Semenov, A. M. Sobolev +1
The understanding of organic content of protoplanetary discs is one of the main goals of the planet formation studies. As an attempt to guide the observational searches for weak li…
Properties of dwarf stars in Cygnus OB2
O. V. Maryeva, S. Yu. Parfenov, M. V. Yushkin +2
We present the results of investigation of five stars, originally classified as dwarfs, belonging to Cyg OB2 association, their stellar and wind properties. Using both TLUSTY and C…
Star formation in the S233 region
D. A. Ladeyschikov, A. M. Sobolev, S. Yu. Parfenov +2
The main objective of this paper is to study the possibility of triggered star formation on the border of the HII region S233, which is formed by a B-star. Using high-resolution sp…
ALMA sub-mm maser and dust distribution of VY Canis Majoris
A. M. S. Richards, C. M. V. Impellizzeri, E. M. Humphreys +25
Cool, evolved stars have copious, enriched winds. The structure of these winds and the way they are accelerated is not well known. We need to improve our understanding by studying…
On the Class II Methanol Maser Periodic Variability due to the Rotating Spiral Shocks in the Gaps of Disks Around Young Binary Stars
S. Yu. Parfenov, A. M. Sobolev
We argue that the periodic variability of Class II methanol masers can be explained by variations of the dust temperature in the accretion disk around proto-binary star with at lea…