Next: Radial velocity of the Up: Optical spectrum of IRAS04296 Previous: Observations and spectra reduction . ... However, molecular emission features are only very rarely observed in the optical spectra of PPNe. ... On the other hand, it is well known that cometary nuclei spectra show prominent Swan band emission. In both spectra of IRAS04296 we have discovered strong emission in the (0;0) and (0;1) bands of the Swan system of the molecule. ... Now consider the case of IRAS04296. ...

In early mid-infrared observations (c 1970) two prominent dust emission features were discovered. ... Soon after the discovery of the silicate features another feature at about 11.3 microns was discovered in the spectra of some carbon stars, not as wide or as strong as the silicate features but still thought to be due to a solid material. ... less common features: extreme carbon stars, the AlO/silicate complex, the "unidentified infrared" features, unusual silicate features . ...

We model the spectral chanages of late oxygen-rich Miras observed in different pulsation phases. From a combination of variable near-IR spectra and UKIRT spectrophotometry of the 9.7 \mu m silicate dust emission feature in different phases we study the influence of the changing atmospherical circumstances on the conditions in the circumstellar dust shell. ... A comparision with the modelling results for another long period Mira U Ori is also provided. ...

... Laboratory and theoretical modelling of the UV bump on the interstellar extinction curve is a very popular topic in dusty investigations. ... feature is illustrated by Fig. 10 where the profiles were calculated using the model of graphite spheres. Figure 10: Normalized extinction efficiencies for graphite spheres. ... The lower panel shows the summary extinction of two graphite spheres with radii and (from upper panel) taken in equal proportions. ...

Subject, Problems and Objects of Theoretical Astrophysics. ... Stellar Photospheres, Their Features. ... Physics of Continuous Radiation Absorption in Stellar Photospheres. ... Continuous Radiation Absorption in Stellar Photospheres of Various Spectral Classes. Solar Type Photospheres. ... Characterisics of Absorption Lines. ... Interstellar Absorption Lines, Their Features. ... Physical and Dynamic Features of Interstellar Medium, Which Follows from Observations of Interstellar Absorption Lines. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2016 March 7 . Mystery Feature Now Disappears in Titan Lake . ... Explanation: What is that changing object in a cold hydrocarbon sea of Titan? ... In an image released last week, the mystery object seems to have disappeared in 2015 January. The featured false-color image shows how the 20-km long object has come, changed, and gone. ...

. Next: Support Up: How to use Previous: New Users . љ MIDAS is used at many different sites on a large variety of configurations. The main part of this manual does not refer to special configurations or hardware devices. Site specific implementations and details of the local installation can be found in Appendix C of Volume A. Rein Warmels . Mon Jan 22 15:08:15 MET 1996

... Does the time it takes different methods to create all the elements coincide with the universeт??s accepted age? ... Illinois Urbana-Champaign) Different kinds of stars create elements at different rates, all of which are consistent with the age of the universe. Get instant access to subscriber content on Astronomy.com! ... Registration is FREE and takes only a few seconds to complete. If you are already registered on Astronomy.com, please log in below. ...

PCI interface and backplane of NGC NGC Backplane General purpose Board features CompactPCI connector Ground and Power planes Bending of the backplane di Different backplane size Leander Mehrgan Backplane General purpose Designed to achieve requirements and specifications for: achie Excellent power distribution High speed differential pairs Mechanical specification Board features CompactPCI ... PCI controller done by the XILINX FPGA (IP core). ...

... Archives . ... I?ve copied below the text of an ISBA announcement for the first workshop in a new series addressing Bayesian methods for machine learning. It builds on the model of the earlier well-known ?Bayesian case studies? workshops, where just a few applications are featured at each workshop, with the format tailored to produce a lot of back-and-forth between application scientists and statisticians. ... Workshop on Case Studies in Bayesian Statistics and Machine Learning . ...

... The galaxy NGC 253 is a well-known nearby spiral galaxy showing numerous peculiar features (e.g. a nuclear ring, gas outflow, a bar, and a warp) which we study using tracers of the different gas phases. ... Whereas the X-rays trace the hottest gas component, the Halpha emission, e.g., shows the distribution of the ionized gas at several thousand Kelvin. ... Keywords. galaxies: individual (NGC 253) - galaxies: starburst. HI in NGC 253 . ... Halpha in NGC 253 . ...