- ID:
- ivo://CDS.VizieR/J/AZh/73/67
- Title:
- Energy distribution of G,K and M stars
- Short Name:
- J/AZh/73/67
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A large number of stars from photometrically homogeneous catalogs are used to derive the normal energy distribution for giants of 15 spectral subclasses. To judge the reliability of the results obtained, the mean (B-V)_S_ color indices calculated for a sample of stars with spectrophotometry are compared with the mean (B-V) for a complete sample of stars of a given subclass from the Bright Star (<V/50>) catalog.
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- ID:
- ivo://CDS.VizieR/J/AZh/73/906
- Title:
- Energy distribution of main-sequence B stars
- Short Name:
- J/AZh/73/906
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The normal spectral energy distribution in the spectra of main-sequence B stars of five subclasses is presented. Spectral classification and UBV photometry from the fourth edition of the BSC and spectrophotometry from three extensive spectrophotometric catalogs are used. The method of selecting unreddened stars is outlined. The good agreement between the mean color indices in the UBV system calculated for a sample of stars with spectrophotometry and for considerably larger samples of unreddened stars of the corresponding subclasses from the BSC confirms the reliability of the results obtained.
- ID:
- ivo://CDS.VizieR/J/AZh/75/70
- Title:
- Energy distribution of O9-B5 stars
- Short Name:
- J/AZh/75/70
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The normal spectral energy distribution for spectral subtypes from O4 to O8 and O9 to B5 for luminosity classes V,IV and III are derived. Three photometrically uniform catalogs served as the source of the spectrophotometric data used. Synthetic color indices for all spectral types are calculated using the energy distribution curves obtained.
- ID:
- ivo://CDS.VizieR/J/AZh/75/197
- Title:
- Energy distribution of O5-O8 stars
- Short Name:
- J/AZh/75/197
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The normal spectral energy distribution for spectral subtypes from O4 to O8 for luminosity classes V,IV and III are derived. Three photometrically uniform catalogs served as the source of the spectrophotometric data used. Synthetic color indices for all spectral types are calculated using the energy distribution curves obtained.
- ID:
- ivo://CDS.VizieR/J/AZh/77/619
- Title:
- Energy distributions in giants and supergiants
- Short Name:
- J/AZh/77/619
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Normal spectral energy distributions for early-type subgiants, giants and supergiants are derived.
- ID:
- ivo://CDS.VizieR/J/AJ/105/853
- Title:
- Energy distributions of radio galaxies
- Short Name:
- J/AJ/105/853
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Far-infrared observations of 140 radio galaxies from the 3CR and B2 catalogs are presented. The galaxies span a range of over four order of magnitude in the radio power, from weak nuclear sources in nearby galaxies, to powerful FR II doubled-lobed sources at moderate redshift. Scanned or pointed observations with IRAS detect 38 of the radio galaxies in at least one waveband; 21 are detected at both 60 and 100 {mu}m. The strength of the far-infrared emission is more closely correlated with core radio emission than with total radio emission, and it is independent of the absolute visual magnitude of the host galaxy. The more luminous 3CR galaxies have warmer far infrared emission than the less luminous B2 galaxies. The relationship between radio and far-infrared luminosity is determined in a way that is insensitive to the large number of infrared nondetections. Radio galaxies have far-infrared emission with similar color temperatures to normal ellipticals; however the inferred amounts of cold interstellar material are typical of gas-rich galaxies. Infrared luminous radio galaxies are rare. Only one in 10^5^ ellipticals with M_V_<-17 has a strong enough radio core to have 10^11^ L_Sun_ of far-infrared emission. Indirect arguments indicates that far-infrared emission in radio galaxies represents star formation that is more closely tied to the active nucleus than to the global properties of the galaxy. The far-infrared luminosity function shows good continuity between radio galaxies and radio loud quasars.
- ID:
- ivo://CDS.VizieR/J/ApJ/776/L31
- Title:
- Energy feedback from XRB from z=0 to z=19.92
- Short Name:
- J/ApJ/776/L31
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- X-ray photons, because of their long mean-free paths, can easily escape the galactic environments where they are produced, and interact at long distances with the intergalactic medium, potentially having a significant contribution to the heating and reionization of the early universe. The two most important sources of X-ray photons in the universe are active galactic nuclei (AGNs) and X-ray binaries (XRBs). In this Letter we use results from detailed, large scale population synthesis simulations to study the energy feedback of XRBs, from the first galaxies (z~20) until today. We estimate that X-ray emission from XRBs dominates over AGN at z>~6-8. The shape of the spectral energy distribution of the emission from XRBs shows little change with redshift, in contrast to its normalization which evolves by ~4 orders of magnitude, primarily due to the evolution of the cosmic star-formation rate. However, the metallicity and the mean stellar age of a given XRB population affect significantly its X-ray output. Specifically, the X-ray luminosity from high-mass XRBs per unit of star-formation rate varies an order of magnitude going from solar metallicity to less than 10% solar, and the X-ray luminosity from low-mass XRBs per unit of stellar mass peaks at an age of ~300Myr and then decreases gradually at later times, showing little variation for mean stellar ages >~3Gyr. Finally, we provide analytical and tabulated prescriptions for the energy output of XRBs, that can be directly incorporated in cosmological simulations.
- ID:
- ivo://CDS.VizieR/J/A+A/473/995
- Title:
- Energy levels and radiative rates in Co XI
- Short Name:
- J/A+A/473/995
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- In this paper we report calculations for energy levels and radiative rates for transitions in Co XI. The General purpose Relativistic Atomic Structure Package GRASP and the Flexible Atomic Code FAC have been adopted for the calculations of energy levels and radiative rates. Energies for the lowest 287 levels of Co XI, including those among the (1s^2^2s^2^2p^6^) 3s^2^3p^5^, 3s3p^6^, 3s^2^3p^4^3d, 3s3p^5^3d, 3s^2^3p^3^3d^2^, and 3s^2^3p^4^4s configurations, are reported. Additionally, radiative rates and oscillator strengths are reported for all electric dipole (E1) transitions with f>=10^-5^ among these levels, and similar results for magnetic dipole (M1), electric quadrupole (E2), and magnetic quadrupole (M2) transitions are reported only for those with f>=10^-8^. Comparisons are made with the available results in the literature, and the accuracy of the present data is assessed. Finally, lifetimes for all excited levels are also listed, although measurements are presently available for only one of these.
- ID:
- ivo://CDS.VizieR/J/ApJS/212/11
- Title:
- Energy levels and spectral lines of FeV
- Short Name:
- J/ApJS/212/11
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper, combining a critical compilation with new calculations, provides revised comprehensive lists of recommended energy levels, observed spectral lines, and transition probabilities in the spectrum of quadruply ionized iron (Fe V). The new level optimization made in this work is based on critically assessed uncertainties of about 2000 wavelengths previously measured with grating spectrographs. For 80% of energy levels, relative uncertainties have been reduced by a factor of three on average, compared with previously reported uncertainties. For 65% of observed lines, uncertainties of the new Ritz wavelengths are smaller than those of observed wavelengths by a factor of four on average.
- ID:
- ivo://CDS.VizieR/J/ApJS/205/14
- Title:
- Energy levels and spectral lines of MnII
- Short Name:
- J/ApJS/205/14
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This compilation revises the previously recommended list of energy levels of singly ionized manganese (Mn II) and provides a comprehensive list of observed spectral lines and transition probabilities in this spectrum. The new level optimization takes into account critically assessed uncertainties of measured wavelengths and includes about a hundred high-precision wavelengths determined by laser spectroscopy and Fourier transform techniques. Uncertainties of 63% of energy levels and 74% of Ritz wavelengths are reduced by a factor of three on average.