A high-resolution spectroscopic study of the gamma radiation from the decay of96Nb

1970 ◽  
Vol 239 (1) ◽  
pp. 42-56 ◽  
Author(s):  
H. W. Taylor ◽  
B. Singh ◽  
R. J. Cox ◽  
A. H. Kukoc
2019 ◽  
Vol 32 ◽  
pp. 89-95 ◽  
Author(s):  
F.P. Condamine ◽  
E. Filippov ◽  
P. Angelo ◽  
S.A. Pikuz ◽  
O. Renner ◽  
...  

1997 ◽  
Vol 92 (6) ◽  
pp. 1073-1082 ◽  
Author(s):  
By ZE-YI ZHOU ◽  
XIAO-GANG WANG ◽  
ZHONG-PING ZHOU ◽  
OLEG N. ULENIKOV ◽  
GALINA A. ONOPENKO ◽  
...  

2005 ◽  
Vol 72 (19) ◽  
Author(s):  
D. J. Aston ◽  
D. J. Payne ◽  
A. J. H. Green ◽  
R. G. Egdell ◽  
D. S. L. Law ◽  
...  

1991 ◽  
Vol 148 ◽  
pp. 351-352
Author(s):  
W. A. Lawson ◽  
P. L. Cottrell ◽  
K. R. Pollard

Over the last several years we have obtained photometric observations of the four suspected (W Men, HV 5637, HV 12671, HV 12842) R Coronae Borealis (RCB) stars in the Large Magellanic Cloud (LMC). Fourier analyses of the light curves has revealed some periodicity in HV 12842, where there appear to be at least two closely spaced periods of 55 and 60 d. High resolution spectra of HV 12842, obtained with the Ango-Australian Telescope (AAT), indicate that it has similar atmospheric properties to a number of warmer galactic RCB and hydrogen-deficient Carbon (HdC) stars, e.g. R CrB, RY Sgr and XX Cam.


1995 ◽  
Vol 91 (1) ◽  
pp. 13 ◽  
Author(s):  
Oleg N. Ulenikov ◽  
Assia B. Malikova ◽  
Hua-feng Li ◽  
Hai-bo Qian ◽  
Qing-shi Zhu ◽  
...  

1993 ◽  
Vol 139 ◽  
pp. 216-216
Author(s):  
Karen Pollard ◽  
P.M. Kilmartin ◽  
A.C. Gilmore ◽  
P.L. Cottrell

AbstractA program to obtain photometric and spectroscopic (high and medium resolution) observations of a number of southern RV Tauri stars has been undertaken over the past two years at the Mount John University Observatory (MJUO). Eleven RV Tauri stars of both RVa (constant mean magnitude) and RVb (varying mean magnitude) photometric type have been chosen as well as normal and weak metal lined RV Tauri stars.Most program stars display the alternating deep and shallow semi-regular light variations as well as the light curve - colour curve phase lag characteristic of RV Tauri stars. Fourier analyses of the light curves have revealed the dominant periodicities (see figure 1) and allowed phasing of the spectroscopic observations.High resolution échelle spectra obtained of these stars around the Hα region display the complex emission and absorption structure of the Hα line at various phases. Metallic lines show emission and line doubling or ‘splitting’ - profiles characteristic of the shock wave that propagates through the line-formation regions of these stars during a pulsational cycle. Spectra at specific phases will be used in an abundance analysis of selected RV Tauri stars.


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