K emission-line widths and the solar chromosphere

Solar Physics ◽  
1971 ◽  
Vol 17 (2) ◽  
pp. 316-330 ◽  
Author(s):  
M. K. V. Bappu ◽  
K. R. Sivaraman
Keyword(s):  
Emission Line ◽  
Solar Chromosphere ◽  
Line Widths

scholarly journals Upper limits on the mass of supermassive black holes from STIS archival data

2007 ◽  
Vol 3 (S245) ◽  
pp. 233-234
Author(s):  
A. Beifiori ◽  
E. M. Corsini ◽  
E. Dalla Bontà ◽  
A. Pizzella ◽  
L. Coccato ◽  
...  
Keyword(s):  
Black Holes ◽  
Emission Line ◽  
Supermassive Black Holes ◽  
Archival Data ◽  
Early Type ◽  
Preliminary Results ◽  
Upper Limits ◽  
Nearby Galaxies ◽  
Line Widths

AbstractThe growth of supermassive black holes (SMBHs) appears to be closely linked with the formation of spheroids. There is a pressing need to acquire better statistics on SMBH masses, since the existing samples are preferentially weighted toward early-type galaxies with very massive SMBHs. With this motivation we started a project aimed at measuring upper limits on the mass of the SMBHs that can be present in the center of all the nearby galaxies (D < 100 Mpc) for which STIS/G750M spectra are available in the HST archive. These upper limits will be derived by modeling the central emission-line widths ([N II] λλ6548, 6583, Hα and [S II] λλ6716, 6731) observed over an aperture of ~01 (R < 50 pc). Here we present our preliminary results for a subsample of 76 bulges.

Cation exchange assisted synthesis of ZnCdSe/ZnSe quantum dots with narrow emission line widths and near-unity photoluminescence quantum yields

2020 ◽  
Vol 56 (45) ◽  
pp. 6130-6133 ◽  
Author(s):  
Xiao Jin ◽  
Kanlin Xie ◽  
Tingting Zhang ◽  
Huada Lian ◽  
Zhenghe Zhang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Emission Line ◽  
Cation Exchange ◽  
Quantum Yields ◽  
Line Widths ◽  
Narrow Emission

ZnCdSe/ZnSe quantum dots reveal a notable FWHM of 17.1 nm with a near-unity PL QY at 631 nm.

scholarly journals THE IMPORTANCE OF BROAD EMISSION LINE WIDTHS IN SINGLE-EPOCH BLACK HOLE MASS ESTIMATES

2012 ◽  
Vol 753 (1) ◽  
pp. L2 ◽  
Author(s):  
R. J. Assef ◽  
S. Frank ◽  
C. J. Grier ◽  
C. S. Kochanek ◽  
K. D. Denney ◽  
...  
Keyword(s):  
Black Hole ◽  
Emission Line ◽  
Black Hole Mass ◽  
Broad Emission ◽  
Line Widths ◽  
Broad Emission Line ◽  
Single Epoch
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