M. Schmidt

Nicolaus Copernicus Astronomical Center — Poland

Physics and Astronomy · Physical Sciences

36h-index8.4kcitations173works0.02yr avg
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Research Topics

Stellar, planetary, and galactic studies(111), Astrophysics and Star Formation Studies(89), Astronomy and Astrophysical Research(57), Astro and Planetary Science(46), Molecular Spectroscopy and Structure(24)

Publications173 total

Exploring cyanopolyynes towards the C-rich post-AGB star IRAS 22272+5435
Monthly Notices of the Royal Astronomical Society·2025Open Access
M Star Opacities: The B<sup>3</sup>Π–X<sup>3</sup>Δ Band System of TiO
The Astrophysical Journal·2025Open Access
A radical transition in the post-main-sequence system U Equulei
Astronomy and Astrophysics·2023· 4 citedOpen Access
ExoMol line lists -- LIV: Empirical line lists for AlH and AlD and experimental emission spectroscopy of AlD in $A$ $^1Π$ ($v=0, 1, 2$)
arXiv (Cornell University)·2023Open Access
ExoMol line lists – LIV. Empirical line lists for AlH and AlD and experimental emission spectroscopy of AlD in A1Π (<i>v</i> = 0, 1, 2)
Monthly Notices of the Royal Astronomical Society·2023· 14 citedOpen Access
A bipolar structure and shocks surrounding the stellar-merger remnant V1309 Scorpii
Astronomy and Astrophysics·2023· 9 citedOpen Access
A radical transition in the post-main-sequence system U Equulei
arXiv (Cornell University)·2023Open Access
Lithium in red novae and their remnants
Astronomy and Astrophysics·2023· 12 citedOpen Access
AlH lines in the blue spectrum of Proxima Centauri
Monthly Notices of the Royal Astronomical Society·2022· 16 citedOpen Access
AlH lines in the blue spectrum of Proxima Centauri
arXiv (Cornell University)·2022Open Access
Lithium in coalesced non-compact stars
arXiv (Cornell University)·2022· 2 citedOpen Access
V838 Monocerotis as seen by ALMA: A remnant of a binary merger in a triple system
Astronomy and Astrophysics·2021· 4 citedOpen Access
V838 Monocerotis as seen by ALMA: a remnant of a binary merger in a\n triple system
arXiv (Cornell University)·2021· 23 citedOpen Access
Molecular remnant of Nova 1670 (CK Vulpeculae)
Astronomy and Astrophysics·2020· 19 citedOpen Access
HD 54361: evidence for the status of a low mass TP-AGB star
Astrophysics and Space Science·2020
The HIFI instrument on board of the Herschel Space Observatory (HSO) has been very successful in detecting molecular lines from the circumstellar envelopes around evolved stars, like massive red supergiants, Asymptotic Giant Branch (AGB) and post-AGB stars, as well as the planetary nebulae. Among others, ammonia have been found in the circumstellar envelopes of C-rich AGB stars in amounts that significantly exceeded the theoretical predictions for C-rich stars. Few scenarios have been proposed to resolve this problem: formation of ammonia behind the shock front and photochemical processes in the inner part of the envelope partly transparent to UV background radiation due to the clumpy structure of the gas and formation of ammonia on dust grains. Careful analysis of observations may help to put the constraints on one or another mechanism of ammonia formation. Here, we present results of the non-LTE radiative transfer modeling of ammonia transitions including the crucial process of radiative pumping via the v2=1 vibrational band (at ∼10 μm) for V Cyg. Only the ground-based ammonia transition NH3 J = 10-00 at 572.5 GHz has been observed by HIFI. Therefore, to determine the abundance of ammonia we estimate the photodissociation radius of NH3 using chemical model of the envelope consistent with the dust grain properties concluded from the spectral energy distribution.
Advances in Astronomy and Space Physics·2020· 1 cited
Ammonia in circumstellar environment of V Cyg
arXiv (Cornell University)·2019Open Access
Ammonia in C-rich stars
Proceedings of the International Astronomical Union·2018
WATER VAPOUR AND AMMONIA IN CIRCUMSTELLAR ENVELOPES OF C-RICH EVOLVED STARS
Proceedings of the 73rd International Symposium on Molecular Spectroscopy·2018Open Access
An observational study of dust nucleation in Mira (<i>o</i> Ceti)
Astronomy and Astrophysics·2016· 37 citedOpen Access
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Frequent Co-authors

J. Cernicharo(22), K. M. Menten(22), J. Krełowski(16), R. Szczerba(16), D. Teyssier(16), David A. Neufeld(15), P. Planesas(15), L. Decin(14), P. Encrenaz(13), A. de Koter(13), Marzena Kaźmierczak(12), M. De Luca(11), J. H. Black(11), J. R. Goicoechea(11), Eric Herbst(11), Thomas F. Giesen(11), P. F. Goldsmith(11), B. Mookerjea(11), M. Salez(11), J. Alcolea(11)