scholarly journals 18 cm Observations of 19 New Southern OH Emission Sources

1974 ◽  
Vol 27 (4) ◽  
pp. 575 ◽  
Author(s):  
BJ Robinson ◽  
JL Caswell ◽  
WM Goss
Keyword(s):  
Milky Way ◽  
Emission Sources ◽  
Line Profiles ◽  
General Properties

In a search for 1665 MHz OH emission in the southern Milky Way, 19 new sources have been discovered. Line profiles of all four 18 cm transitions are presented for all but one of the sources, and we discuss the general properties of the sources and their distribution in relation to the positions searched.

scholarly journals A 1667 MHz OH Absorption Survey of the Southern Milky Way

1974 ◽  
Vol 27 (4) ◽  
pp. 597 ◽  
Author(s):  
JL Caswell ◽  
BJ Robinson
Keyword(s):  
Milky Way ◽  
Line Emission ◽  
The Other ◽  
Emission Sources ◽  
Satellite Line ◽  
Galactic Longitude

A search has been made at 1667 MHz for OH absorption against 105 strong continuum sources in the region 2650 < I < 352�, and data are presented for 33 sources showing absorption. The overall distribution of OH absorption in this galactic longitude range has been investigated by combining these results with measurements on 11 additional sources studied in earlier searches. Many of the sources showing 1667 MHz absorption have been observed at the other three 18 cm OH transitions and as a result 14 new satellite-line emission sources have been found.

scholarly journals THE STRUCTURE OF COLD DARK MATTER HALOS: RECENT INSIGHTS FROM HIGH RESOLUTION SIMULATIONS

2009 ◽  
Vol 24 (29) ◽  
pp. 2291-2305 ◽  
Author(s):  
MARCEL ZEMP
Keyword(s):  
Dark Matter ◽  
High Resolution ◽  
Structure Formation ◽  
Cold Dark Matter ◽  
Milky Way ◽  
Dark Matter Halos ◽  
General Properties

We review results from recent high resolution cosmological structure formation simulations, namely the Via Lactea I & II and GHALO projects. These simulations study the formation of Milky Way sized objects within a cosmological framework. We discuss the general properties of cold dark matter halos at redshift z = 0 and focus on new insights into the structure of halos we got due to the unprecedented high resolution in these simulations.

scholarly journals General Properties of Ultraviolet Flares in RS CVn Systems

1989 ◽  
Vol 104 (2) ◽  
pp. 111-114
Author(s):  
J. E. Neff ◽  
A. Brown ◽  
J. L. Linsky
Keyword(s):  
High Resolution ◽  
Flow Velocity ◽  
Line Profiles ◽  
Line Broadening ◽  
General Properties

AbstractApproximately 10 very bright flares in RS CVn systems have been observed with the IUE. In several cases, high-resolution spectra of the Mg II k line profiles were obtained before, during, and after the flare. Such data permit us to measure the position and size of the flaring region, the amount of line broadening, and any systematic flow velocity. In two cases, several spectra were obtained during the flare decay, permitting us to study the change in these quantities during the flare decay.

scholarly journals Positions and 1665 MHz Line Profiles for 10 Northern OH Emission Sources

1974 ◽  
Vol 27 (4) ◽  
pp. 629 ◽  
Author(s):  
JL Caswell ◽  
BJ Robinson
Keyword(s):  
Circular Polarization ◽  
Emission Sources ◽  
Line Profiles

Positions with r.m.s. errors of about 20" arc have been determined for the stronger OH emission sources discovered in two northern searches. Line profiles at 1665 MHz with 1 kHz resolution are presented for both senses of circular polarization.

scholarly journals Spectroscopy of Cool Stars from IUE Data

1988 ◽  
Vol 132 ◽  
pp. 163-168
Author(s):  
P. G. Judge
Keyword(s):  
Mass Loss ◽  
Emission Line ◽  
High Signal ◽  
Line Profiles ◽  
Signal To Noise ◽  
High Quality ◽  
Atmospheric Structure ◽  
General Properties ◽  
Cool Stars ◽  
The Impact

After nine years of operation the IUE satellite continues to provide valuable spectra of cool stars from 1200 to 3100 Å. The impact of these spectra has been greatest in studies of the outer regions of the atmospheres, above the photospheres, allowing the general properties of stellar chromospheres, transition regions and winds to be established. After outlining these properties, I focus on studies based on high signal–to–noise echelle spectra (λ/Δλ ∼1.2 ×104) of single stars, showing how high quality emission line profiles have been used to derive constraints on the outer atmospheric structure, which in turn have been used to examine models of heating and mass loss.

scholarly journals GARROTXA COSMOLOGICAL SIMULATIONS OF MILKY WAY-SIZED GALAXIES: GENERAL PROPERTIES, HOT-GAS DISTRIBUTION, AND MISSING BARYONS

2016 ◽  
Vol 824 (2) ◽  
pp. 94 ◽  
Author(s):  
Santi Roca-Fàbrega ◽  
Octavio Valenzuela ◽  
Pedro Colín ◽  
Francesca Figueras ◽  
Yair Krongold ◽  
...  
Keyword(s):  
Milky Way ◽  
Gas Distribution ◽  
Cosmological Simulations ◽  
Hot Gas ◽  
General Properties ◽  
Galaxies General

New OH Emission Sources

1971 ◽  
Vol 2 (1) ◽  
pp. 36-38 ◽  
Author(s):  
B. J. Robinson ◽  
J. L. Caswell ◽  
W. M. Goss
Keyword(s):  
Milky Way ◽  
Emission Sources ◽  
Exploratory Search ◽  
Thermal Sources

In 1966 McGee, Gardner and Robinson carried out an exploratory search at 1665 MHz for OH in 26 thermal sources in the southern Milky Way and reported emission in 12 sources. Subsequent measurements by Robinson, Goss and Manchester confirmed emission from six of these and detected four additional OH emitters.

Variation of the amount of hydrogen along the galactic ridge

1967 ◽  
Vol 31 ◽  
pp. 171-172
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Surface Brightness ◽  
Milky Way ◽  
Neutral Hydrogen ◽  
Line Of Sight ◽  
Optical Surface ◽  
Hydrogen Density ◽  
Continuous Radiation ◽  
Galactic Longitude

The integralNHof neutral-hydrogen density along the line of sight is determined from the Kootwijk and Sydney surveys. The run ofNHwith galactic longitude agrees well with that of thermal continuous radiation and that of the optical surface brightness of the Milky Way.

Angular size of OH emission regions

1967 ◽  
Vol 31 ◽  
pp. 71-72
Author(s):  
B. F. Burke ◽  
P. P. Crowther ◽  
J. M. Moran ◽  
A. E. E. Rogers ◽  
J. A. Ball ◽  
...  
Keyword(s):  
Angular Size ◽  
Emission Sources ◽  
Ngc 6334

Interferometry gives effective diameters less than 20″ for the OH emission sources in W3and Sgr B2. The sources in W49and NGC 6334 contain two or more components, some of which are smaller than 25″.

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