English
Related papers

Related papers: A variationally computed line list for hot NH3

200 papers

Hyperfine constants and anomalies of ground as well as few low lying excited states of $^{113,115,117}$In III are studied with highly correlated relativistic coupled-cluster theory. The ground state hyperfine splitting of $^{115}$In III is…

Atomic Physics · Physics 2015-06-18 Sourav Roy , Narendra Nath Dutta , Sonjoy Majumder

We report systematic mapping observations of the NH$_{3}$ (1,1) and (2,2) inversion lines towards 62 high-mass star-forming regions using VLA in its D and DnC array configurations. The VLA images cover a spatial dynamic range from 40$"$ to…

Astrophysics of Galaxies · Physics 2015-06-19 Xing Lu , Qizhou Zhang , Hauyu Baobab Liu , Junzhi Wang , Qiusheng Gu

Within a quasiparticle framework, we reconsider the issue of computing the Bose-Einstein condensation temperature ($T_c$) in a weakly non-ideal Bose gas. The main result of this and previous investigations is that $T_c$ increases with the…

Condensed Matter · Physics 2007-05-23 Masudul Haque , Andrei E. Ruckenstein

We have constructed a comprehensive grid of 1540 metal line-blanketed, NLTE, plane-parallel, hydrostatic model atmospheres for the basic parameters appropriate to early B-type stars. The BSTAR2006 grid considers 16 values of effective…

Astrophysics · Physics 2008-11-26 Thierry Lanz , Ivan Hubeny

The binding energies (BE) of molecules on the interstellar grains are crucial in the chemical evolution of the interstellar medium (ISM). Both temperature programmed desorption (TPD) laboratory experiments and quantum chemistry computations…

Astrophysics of Galaxies · Physics 2022-05-25 Lorenzo Tinacci , Aurele Germain , Stefano Pantaleone , Stefano Ferrero , Cecilia Ceccarelli , Piero Ugliengo

Ethyl cyanide is an abundant molecule in hot molecular clouds. Lines from 13C isotopically substituted ethyl cyanide were identified in Orion. To enable the search and the possible detection of other isotopologues of ethyl cyanide in…

We present a new, approximate method of calculating the column density of ammonia in mapping observations of the 23 GHz inversion lines. The temperature regime typically found in star forming regions allows for the assumption of a slowly…

Instrumentation and Methods for Astrophysics · Physics 2015-06-04 L. K. Morgan , T. J. T. Moore , J. Allsopp , D. J. Eden

Vibrating wires are common temperature probes in $^3$He experiments. By measuring mechanical resonance of a wire driven by AC current in magnetic field one can directly obtain temperature-dependent viscous damping. This is easy to do in a…

Other Condensed Matter · Physics 2023-03-03 V. V. Zavjalov

In this paper we discuss two approximate methods previously suggested for modeling hyperfine spectral line emission for molecules whose collisional transitions rates between hyperfine levels are unknown. Hyperfine structure is seen in the…

Astrophysics of Galaxies · Physics 2015-05-18 Eric Keto , George Rybicki

The high resolution rovibronic line list of MgH+ molecular cation are presented in our work. The potential energy curves are calculated by the method of multireference configuration interaction plus Davidson correction (MRCI+Q) and…

Solar and Stellar Astrophysics · Physics 2024-01-03 Huagang Xiao , Tao Gao

High-energy muons from air shower events detected in IceCube are selected using state of the art machine learning algorithms. Attributes to distinguish a HE-muon event from the background of low-energy muon bundles are selected using the…

Instrumentation and Methods for Astrophysics · Physics 2017-01-17 Tomasz Fuchs

We report theoretical best estimates of vertical transition energies (VTEs) for a large number of excited states and molecules: the \textsc{quest} database. This database includes 1489 \emph{aug}-cc-pVTZ VTEs (731 singlets, 233 doublets,…

New molecular line lists for calcium monohydride ($^{40}$Ca$^{1}$H) and magnesium monohydride ($^{24}$Mg$^{1}$H) and its minor isotopologues ($^{25}$Mg$^{1}$H and $^{26}$Mg$^{1}$H) are presented. The rotation-vibration-electronic…

Earth and Planetary Astrophysics · Physics 2022-10-25 Alec Owens , Sophie Dooley , Luke McLaughlin , Brandon Tan , Guanming Zhang , Sergei N. Yurchenko , Jonathan Tennyson

We report a systematic investigation on the high-temperature thermoelectric response in a typical filling-control Mott transition system La1-xSrxVO3. In the vicinity of the Mott transition, incoherent charge transport appears with…

Strongly Correlated Electrons · Physics 2015-05-27 M. Uchida , K. Oishi , M. Matsuo , W. Koshibae , Y. Onose , M. Mori , J. Fujioka , S. Miyasaka , S. Maekawa , Y. Tokura

(abridged) We present ATCA and GBT observations of ammonia (NH3) toward the ultraluminous infrared galaxy (ULIRG) merger Arp220. We detect the NH3 (1,1), (2,2), (3,3), (4,4), (5,5), and (6,6) inversion lines in absorption against the…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Juergen Ott , Christian Henkel , James A Braatz , Axel Weiss

We describe a simple and accurate differential thermal analysis set up to measure the latent heat of solid state materials undergoing abrupt phase transitions in the temperature range from 77 K to above room temperature. We report a…

Statistical Mechanics · Physics 2021-10-12 Tapas Bar , Bhavtosh Bansal

The spatial origin and detectability of rotational H2O emission lines from Herbig Ae type protoplanetary disks beyond 70 micron is discussed. We use the recently developed disk code ProDiMo to calculate the thermo-chemical structure of a…

Earth and Planetary Astrophysics · Physics 2015-05-13 Peter Woitke , Wing-Fai Thi , Inga Kamp , Michiel R. Hogerheijde

The photometric light curves of BRITE satellites were examined through a machine learning technique to investigate whether there are possible exoplanets moving around nearby bright stars. Focusing on different transit periods, several…

Earth and Planetary Astrophysics · Physics 2020-12-21 Li-Chin Yeh , Ing-Guey Jiang

The phase transitions in the Bose-Hubbard model are investigated. A single-particle Green's function is calculated in the random phase approximation and the formalism of the Hubbard operators is used. The regions of existence of the…

Other Condensed Matter · Physics 2009-07-10 I. V. Stasyuk , T. S. Mysakovych

Studies on high-entropy alloy (HEA) superconductors have recently been increasing, particularly in the fields of materials science and condensed matter physics. To contribute to research on new HEA-type superconductors, in our study we…

Superconductivity · Physics 2021-02-25 Aichi Yamashita , Tatsuma D. Matsuda , Yoshikazu Mizuguchi