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. ...

... Right: cold gas traced by [CII] emission (red) accreting onto a primeval galaxy (green) at z=7.1 ( Maiolino et al. 2015 ) (image credit: ALMA Press Release ) . ... 2010 , Cicone, Maiolino et al. ... 2012 , Cicone, Maiolino et al. ... Right: observed distribution of the average stellar metallicities of passive and star forming galaxies in the local universe, supporting starvation/strangulation as primary quenching mechanism in low/intermediate mass galaxies ( Peng, Maiolino, Cochrane 2015 ). ...

... During the analysis of the surveys carried out on RATAN-600, it was found that almost one fifth of the detected sources shows significant radio flux variations. ... We used the data from "Cold" radio surveys carried out with RATAN-600 in 1980-1994 to search for radio sources with significant flux variability. ... On possibility of detection of variable sources using the data of Cold surveys carried out on RATAN-600. ... Detection of Variable Sources Using the Data of "Cold" Surveys. ...

home publications > mercury . SEARCH ASP SITE: Match ALL words Match ANY word . ... ASP Conference Series . ... Steering by Different Stars? Astronomers and the Dark-Sky Movement . ... Photo courtesy of the International Dark-Sky Association. by Susan McGowan . ... According to Arthur Upgren, senior research scientist at Yale University and emeritus professor of astronomy at Wesleyan University, only 17% of ASP members were also members of the International Dark-Sky Association in 2001. ...

... January 18, 1997 . M16: Nebula With Star Cluster . ... Explanation : The photogenic M 16 shown above is composed of a young star cluster associated with a spectacular emission nebulae lined with clouds of interstellar dust . ... This type of star cluster is called an "open" or "galactic" cluster and typically has a few hundred young bright members. ... The dust absorbs so much light it allows astronomers to determine which stars are inside the nebula and which are in the foreground. ...

Launch Vehicle Energia . ... Among problems solved while developing the Energia-Buran Reusable Space System were: . ... of the Energia-Buran Space System . to the launch site for the first launch. LV Energia at the launch site working out of LV design to serve as a basis for the development of other launch vehicles differing not only in their liftoff capabilities, but also in types of payloads including reusable orbiters; . ... SEA LAUNCH . ... Official WEB-site of S.P.Korolev RSC Energia . ...

... ATNF Home . ... About ATNF overview . ... Australia Telescope Steering Committee . ... Australia Telescope User Committee . ... Astrophysics graduate student programs . ... Facilities . ATNF facilities . ... Australian Square Kilometre Array Pathfinder . Murchison Radio-astronomy Observatory . ... Parkes radio telescope . Australia Telescope Compact Array . ... Visiting Parkes radio telescope . Visiting Australia Telescope Compact Array . ... Parkes radio telescope webcam . ...

... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

... An Orion of a Different Color . ... It is a familiar object though, the grand stellar nursery known as the Orion Nebula . But the striking picture combines images taken through three separate filters, each designed to record different emission lines - light from Sulfur, Oxygen, and Hydrogen atoms glowing in the tenuous nebular gas. At such low densities , Sulfur and Hydrogen atoms emit red colors while Oxygen glows green. ... Publications with keywords: Orion Nebula . ... The Heart Of Orion . ...

Astronomes Amateurs du Luxembourg a.s.b.l. " We bring the Universe to you ! Founded in 1971 by a group of enthusiasts and star aficionados, our association is now counting more than 130 members.As a national association we attract hobby astronomers from the whole country to our regular night-sky observations and to the meetings in our club at Dudelange. ... by topic : PDF File Download (360KB) . ... Article about AAL in "Le Quotidien" newspaper of Juli 21 2005 - PDF File Download (132KB) . ...