scholarly journals Hot Stellar Populations in the M31 Bulge

1993 ◽  
Vol 153 ◽  
pp. 415-416
Author(s):  
Henry C. Ferguson ◽  
Arthur F. Davidsen
Keyword(s):  
Stellar Populations ◽  
Spectral Energy ◽  
Horizontal Branch ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Relative Contribution ◽  
Uv Emission

We investigate the possibility that the Far-UV spectral energy distributions (SED's) of M31 and NGC 1399 differ only in the relative contribution from classical PAGB stars and in the amount of extinction. A good fit to the M31 spectrum is obtained for E(B-V) = 0.11 if about 65% of the flux comes from PAGB stars and the rest from stars of the type producing the far-UV emission in NGC1399. We speculate that the UV continuum in both galaxies is dominated by stars in post-horizontal branch phases of evolution, with a distribution of post-HB masses governed primarily by the metallicity and metallicity spread of the population. This hypothesis can qualitatively explain both the relative fluxes of UV rising branches in NGC1399 and M31 and the shapes of their SED's.

scholarly journals Modeling of Integrated Spectral Energy Distributions of Stellar Populations with Various Binary Fractions

2021 ◽  
Vol 2068 (1) ◽  
pp. 012048
Author(s):  
Zhongmu Li ◽  
Chen Yan
Keyword(s):  
Binary Stars ◽  
Star Clusters ◽  
Stellar Populations ◽  
Spectral Studies ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Spectral Fitting ◽  
The Universe

Abstract Binary stars are common in the universe, but binary fractions are various in different star clusters and galaxies. Studies have shown that binary fraction affects the integrated spectral energy distributions obviously, in particular in the UV band. It affects spectral fitting of many star clusters and galaxies significantly. However, previous works usually take a fixed binary fraction, i.e., 0.5, and this is far from getting accurate results. Therefore, it is important to model the integrated spectral energy distributions of stellar populations with various binary fractions. This work presents a modeling of spectral energy distributions of simple stellar populations with binary fractions of 0.3, 0.7, and 1.0. The results are useful for different kinds of spectral studies.

scholarly journals Synthetic photometric indices for Galactic globular clusters

1993 ◽  
Vol 153 ◽  
pp. 343-344
Author(s):  
M.L. Malagnini ◽  
L.E. Pasinetti Fracassini ◽  
S. Covino ◽  
A. Buzzoni
Keyword(s):  
Observational Data ◽  
Globular Clusters ◽  
Stellar Populations ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
Theoretical Predictions ◽  
Galactic Globular Clusters

A grid of synthetic spectral energy distributions, representative of old stellar populations, has been used to derive colors in different photometric systems, and to compare the theoretical predictions with observational data for galactic globular clusters.

scholarly journals A first glance into the Spectral Energy Distributions of Single Stellar Populations in the Infrared range

2011 ◽  
Vol 7 (S284) ◽  
pp. 32-34 ◽  
Author(s):  
Sofia Meneses-Goytia ◽  
Reynier F. Peletier
Keyword(s):  
Stellar Population ◽  
Stellar Populations ◽  
Elliptical Galaxies ◽  
Population Models ◽  
Spectral Energy ◽  
Infrared Range ◽  
Optical Range ◽  
Spectral Energy Distributions ◽  
Energy Distributions ◽  
K Band

AbstractThe present work shows the Spectral Energy Distributions (SEDs) in the infrared using the IRTF stellar library, obtained using models based on Single Stellar population Models (SSP). We have focused on the K band in order to compare with observables of elliptical galaxies. We also present the comparisons of our models with velocity dispersions, ages and metallicities obtained with models in the optical range.

scholarly journals Erratum: ProSpect: generating spectral energy distributions with complex star formation and metallicity histories

2020 ◽  
Vol 500 (3) ◽  
pp. 2859-2860
Author(s):  
A S G Robotham ◽  
S Bellstedt ◽  
C del P Lagos ◽  
J E Thorne ◽  
L J Davies ◽  
...  
Keyword(s):  
Star Formation ◽  
Spectral Energy ◽  
Spectral Energy Distributions ◽  
Energy Distributions
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