Results 41 to 50 of about 301,064 (245)
First Observations With a GNSS Antenna to Radio Telescope Interferometer
Radio Science, Volume 58, Issue 8, August 2023., 2023 Abstract We describe the design of a radio interferometer composed of a Global Navigation Satellite Systems (GNSS) antenna and a Very Long Baseline Interferometry radio telescope. Our eventual goal is to use this interferometer for geodetic applications including local tie measurements.
J. Skeens +7 more
wiley +1 more source
Infrared Spectral Fingerprint of Neutral and Charged Endo- and Exohedral Metallofullerenes
The Astrophysical Journal Supplement Series, 2023 Small metal-containing molecules have been detected and recognized as one of the hybrid species that are efficiently formed in space, especially in the circumstellar envelopes of evolved stars.
R. Barzaga +7 more
doaj +1 more source
The harsh environment where exoplanets live
Astronomische Nachrichten, Volume 343, Issue 4, May 2022., 2022 Abstract The X‐ray and Extreme Ultraviolet (XUV) actvity of the Sun has determined important effects on the planets around it. In particular, high doses of X‐rays, flares, and coronal mass ejections (CMEs) combined with masses and sizes of the planets and the shielding action of the planetary magnetic fields have determined the diverse habitability of ...
Ignazio Pillitteri
wiley +1 more source
(New) molecular ions in the interstellar medium
EPJ Web of Conferences, 2015 We summarize the present knowledge on the molecular ionic content in the interstellar medium and in circumstellar envelopes. Emphasis is given on the most recent detections and the related chemical issues.
Roueff Evelyne
doaj +1 more source
Odessa Astronomical Publications, 2017 The main parameters of the close binaries V448 Cyg and XZ Cep were determined. Computation of the chemical composition of the atmospheres of their primary components showed the existence of the hydrogen deficiency in them.
L. V. Glazunova, G. V. Manilova
doaj +1 more source
Molecules in Circumstellar Envelopes [PDF]
Highlights of Astronomy, 1989 ABSTRACTThe chemistry of circumstellar envelopes around evolved stars is extremely rich, especially for C-rich ones. 34 molecules have been identified in IRC+10216. Recent observations and modeling prove that most of the unstable species are formed by photochemistry in the outer layers of the envelope.
openaire +1 more source
Energy Balance in Circumstellar Envelopes [PDF]
International Astronomical Union Colloquium, 2000 AbstractWe have successfully determined the kinetic temperature of the electron gas as a function of position in the circumstellar envelopes of Be stars. Our method yields a self-consistent solution of the equation for energy conservation, thus eliminating the necessity to assume arbitrarily a temperature for the gas.
C. E. Millar +2 more
openaire +1 more source
Connecting the evolution of thermally pulsing asymptotic giant branch stars to the chemistry in their circumstellar envelopes – I. Hydrogen cyanide [PDF]
, 2015 We investigate the formation of hydrogen cyanide (HCN) in the inner circumstellar envelopes of thermally pulsing asymptotic giant branch (TP-AGB) stars.
P. Marigo +6 more
semanticscholar +1 more source
MODELS OF CIRCUMSTELLAR MASERS IN BIPOLAR OUTFLOWS
Odessa Astronomical Publications, 2017 Sources of molecular maser radio emission in envelopes of late-type variable stars (red giants and supergiants) are considered. Radio and optical data on asymmetry of mass loss process in red giants are briefly reviewed.
G. M. Rudnitskij
doaj +1 more source