The transfer of Lyman continuum radiation in chromospheric flares

Solar Physics ◽  
1971 ◽  
Vol 21 (1) ◽  
pp. 176-187 ◽  
Author(s):  
Robert S. Kandel ◽  
Michael D. Papagiannis ◽  
Federico M. Strauss
Keyword(s):  
Continuum Radiation ◽  
Lyman Continuum

scholarly journals A New Technique for Finding Galaxies Leaking Lyman-continuum Radiation: [S ii]-deficiency

2019 ◽  
Vol 885 (1) ◽  
pp. 57 ◽  
Author(s):  
Bingjie Wang ◽  
Timothy M. Heckman ◽  
Claus Leitherer ◽  
Rachel Alexandroff ◽  
Sanchayeeta Borthakur ◽  
...  
Keyword(s):  
New Technique ◽  
Continuum Radiation ◽  
Lyman Continuum ◽  
A New Technique

scholarly journals Detection of Escaping Lyman Continuum Radiation in Two Local Starbursts Using FUSE

2006 ◽  
Vol 2 (S235) ◽  
pp. 316-316
Author(s):  
E. Leitet ◽  
N. Bergvall ◽  
B-G Andersson ◽  
E. Zackrisson
Keyword(s):  
Interstellar Medium ◽  
Starburst Galaxies ◽  
Compact Galaxy ◽  
Archival Data ◽  
Continuum Radiation ◽  
Neutral Gas ◽  
Lyman Continuum ◽  
Profile Fitting ◽  
First Results ◽  
Far Ultraviolet

AbstractWe present the detection of escaping Lyman Continuum (LyC) radiation from two local starburst galaxies, Tol 1247-232 and Tol 0440-381, using archival data from the Far Ultraviolet Spectroscopic Explorer (FUSE). From profile fitting of metal lines, high densities of neutral gas were derived for both galaxies, implying that the LyC radiation is escaping from holes in the interstellar medium. The first results for one of the galaxies, Tol 1247-232, give an escape fraction (fesc) of 17–35%. These new detections, together with that of the blue compact galaxy Haro 11 in Bergvall et al. (2006) where fesc between 4–10% was found, will have a feedback on cosmic reionization models.

scholarly journals Star Clusters in Giant Extragalactic HII Regions

2002 ◽  
Vol 207 ◽  
pp. 439-444
Author(s):  
Yu Zhi-yao
Keyword(s):  
Star Formation ◽  
Key Words ◽  
Star Clusters ◽  
Hii Regions ◽  
Star Cluster ◽  
Continuum Radiation ◽  
Hii Region ◽  
Lyman Continuum ◽  
Formation Efficiency ◽  
The Relationship

In this paper we study the relationship between the star formation efficiency and luminosity of Hα emission, Lyman continuum radiation, and Hβ emission on 35 giant extragalactic HII regions in seven galaxies. Using the observational results we obtain the relationship, and find that the star formation efficiency is correlation with Halpha luminocity, and Lyman continuum luminosity, and Hβ lumonosity, respectively. Key words: external galaxy—giant HII region—star cluster

scholarly journals EUV Radiation from B Stars: The Broad Implications for Stellar and Interstellar Astronomy

1996 ◽  
Vol 152 ◽  
pp. 367-374
Author(s):  
Joseph P. Cassinelli
Keyword(s):  
Variable Star ◽  
Extreme Ultraviolet ◽  
Early Type ◽  
Large Excess ◽  
Continuum Radiation ◽  
B Stars ◽  
Lyman Continuum ◽  
High Ionization ◽  
Early Type Stars ◽  
Warm Ionized Medium

Observations made with the Extreme Ultraviolet Explorer (EUVE) of the two bright stars ϵ CMa (B2 II) and β CMa (Bl II-III) are discussed. The photospheres show excess EUV radiation. The wind of ϵ CMa exhibits the Bowen Fluorescence mechanism, along with high ionization stages that help explain the nature of the wind shocks. The pulsation and beat phenomena exhibited by the variable star β CMa suggest that deposition of residual pulsation energy might heat and modify the structure of the atmospheres of early-type stars near the β Cephei strip. The possibility that many other B stars show a large excess Lyman continuum radiation is considered as a possible source of the ionization of the warm ionized medium (WIM) in the galactic ISM.

scholarly journals New constraints on the average escape fraction of Lyman continuum radiation in z ~ 4 galaxies from the VIMOS Ultra Deep Survey (VUDS)

2017 ◽  
Vol 601 ◽  
pp. A73 ◽  
Author(s):  
F. Marchi ◽  
L. Pentericci ◽  
L. Guaita ◽  
B. Ribeiro ◽  
M. Castellano ◽  
...  
Keyword(s):  
Continuum Radiation ◽  
Lyman Continuum ◽  
Deep Survey

scholarly journals Hubble Space TelescopeWide Field Camera 3 Observations of Escaping Lyman Continuum Radiation from Galaxies and Weak AGN at Redshiftsz∼ 2.3–4.1

2018 ◽  
Vol 853 (2) ◽  
pp. 191 ◽  
Author(s):  
Brent M. Smith ◽  
Rogier A. Windhorst ◽  
Rolf A. Jansen ◽  
Seth H. Cohen ◽  
Linhua Jiang ◽  
...  
Keyword(s):  
Continuum Radiation ◽  
Lyman Continuum

scholarly journals Constraints on the Lyman continuum radiation from galaxies: First results with FUSE on Mrk 54

2001 ◽  
Vol 375 (3) ◽  
pp. 805-813 ◽  
Author(s):  
J.-M. Deharveng ◽  
V. Buat ◽  
V. Le Brun ◽  
B. Milliard ◽  
D. Kunth ◽  
...  
Keyword(s):  
Continuum Radiation ◽  
Lyman Continuum ◽  
First Results
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