2.5Г-1021 cm-2) have associated dust emission. ... We estimate dust masses of ~104-106 Msolar for the M81 dwarf galaxies, resulting in an average dust-to-gas ratio (Mdust/MHI) of ~3Г-10-4 (1.5Г-10-3 if only the H I that is associated with dust emission is considered); this is an order of magnitude lower than the typical value derived for the SINGS spirals. ... However, the average 70/160 О?m ratio in the sample dwarf galaxies is higher than what is found in the other galaxies of the SINGS sample. ...

... Early studies of PMS stars focused on T associations, especially Taurus-Auriga. However, one might expect low mass star formation to be different in OB associations. ... He identified Orion OB1a as the stars northwest of the belt. Orion OB1b is composed of the stars near the belt, including the belt stars and Orionis. ... He finds no perceptible distance change within the Orion OB1b association and finds the distance modulus to be 7.8 and 7.9 for Orion OB1a and OB1b respectively. ...

Next: W.M. Napier, Senior Research Up: Research Previous: M.E. Bailey, Director Contents . ... Correlation between Spectroscopy and Photometry in PCygni . ... A paper analysing the photometry of PCygni during the 20th century is in preparation in collaboration with C.Sterken, Brussels, and A. van Genderen, Leiden. ... On the invitation of its Editor, a review article on PCygni, in collaboration with G. Israelian (Tenerife) was produced for Astrophysics and Space Science . ...

. First page Back Continue Last page Summary Graphics . Rosette MC (Williams et al. 1995) . HISA 0 physically associated with MC . HI excess emission in the same velocity range . 0 N(HI) ~(0.6-1.3) 1021 cm-2 , <n(HI)>=1.7-9 cm-3 . The argument by Williams et al is little bit different. They found HISA associated with some limited areas of RMC. Then they used the HI emission at the same velocity interval to derive a mean density between 1.7 and 9.

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

Next: An example of Up: Association of images Previous: Association of images . The two sets of selection criteria (``first choice'' and ``second choice'') have to be entered in a table containing four columns: . FUNCTION --character column (max 256 char) . This column defines the different selection criteria and shall contain mathematical expressions in which the variables may be the columns of the OST. ... RANGE_1 --character column (max 256 char) . ... WEIGHT --real column . ...

... DLTS . ... Deep Level Transient Spectroscopy ( DLTS ) is a unique and powerful tool for the study of electrically active defects (known as traps) in semiconductors. DLTS can be used in one of two modes of operation; with Schottky diodes or with p-n junctions. ... The capacitance transient is measured as a function of temperature (usually in the range from liquid nitrogen temperature to room temperature 300K or above). ...

Optical Spectroscopy of the Eastern Filament of W50 O. Maryeva, P. Abolmasov, A. Burenkov and A. Moiseev Abstract: We present the results of long-slit and FPI spectroscopy of the Eastern optical filament of the radionebula W50, associated with the well-known peculiar binary SS433. ... Our results are consistent w ith the optical filaments being powered by the EUV/X-ray radiation from high-velocity shock waves in the Eastern lobe of W50 or from SS433. ...

... High-resolution Herschel spectroscopy reveals the proto-planetary disk around the young star T Tau N . ... A study led by Linda Podio ( AstroFIt fellow at the Arcetri Observatory) with Inga Kamp (Kapteyn Institute, the Netherlands), Claudio Codella (Observatory of Arcetri) and other collaborators from Grenoble, UK and USA, makes use of high-resolution spectroscopic observations with HIFI on board the Herschel space observatory to characterize the disk around the young star T Tau N . ...

... At the ESO Web you'll find a range of different file formats - from HTML to PostScript/PDF and MPEG movies. See below for a list of helper applications or viewers to display those formats on your MS Windows, Macintosh or Unix computer. ... You can use Ghostscript and ghostview/GSview to view PostScript files (available for MS Windows, Macintosh and Unix platforms). ... MPEG is a way to code audio-visual information a digital format. For Unix platforms, you can use UC Berkeley's mpeg_play . ...

... This paper describes various methods for the analysis of spectroscopic data, particularly as they relate to wavelength calibration of echelle-format spectra. ... Keywords: spectroscopy, Hough transform, wavelet transform, robust regression, echelle, wavelength calibration . ... Wavelet transform can be useful in complementing robust techniques for multiresolution analysis, and Section 4 presents an application of the Mexican hat transform to the detection of spectral features. ...