Home     Baþlangýç     Evrende yaþayabilmek için    
Inhabited Sky
    News@Sky     Gökyüzü görüntüsü     Koleksiyon     Forum     Blog New!     SSS     Basýn     Giriþ  

HD 90490


Ýçindekiler

Görüntüler

Resim Yükleyin

DSS Images   Other Images


Ýlgili Makaleler

The Carina Spiral Feature: Strömgren-Hβ photometry approach. I. The photometric data-base
A data-base collating all uvbybeta photometry available at present forO-B9 stars brighter than 10th visual magnitude in the field of theCarina Spiral Feature is presented. The completeness and homogeneity ofthe data-base are discussed.Based on CDS data.Table 1 is only available in electronic form at the CDS via anonymousftp to cdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/410/523

The calibration of the Stromgren photometric system for A, F and early G supergiants. I - The observational data
An empirical calibration of the Stromgren uvby-beta photometric systemfor the A, F, and early G supergiants is being derived. This paperexplains the observational program and the photometric reductiontechniques used and presents a catalog of new Stromgren photometry forover 600 A, F, and G supergiants.

The WN4 + O4-6 Wolf-Rayet binary HD 90657
HD 90657 is shown to be a WN4 + O4-6 binary, much like the WN4 + O9binary HD 186943 with mass ratio M(W-R)/M(O) approximately equal to0.52. The best W-R orbit is derived from the emission lines of highestexcitation, which show the least phase shift relative to the (reliable)absorption-line orbit due to the O component. Light curve variationsrestrain the masses to a range of about 11-14 solar masses for the WN4component, and 21-28 solar masses for the O-type component

A Catalogue of Be-Stars
Not Available

Observations of southern emission-line stars
A catalog of 1929 stars showing H-alpha emission on photographic platesis presented which covers the entire southern sky south of declination-25 deg to a red limiting magnitude of about 11.0. The catalog providesprevious designations of known emission-line stars equatorial (1900) andgalactic coordinates, visual and photographic magnitudes, H-alphaemission parameters, spectral types, and notes on unusual spectralfeatures. The objects listed include 16 M stars, 25 S stars, 37 carbonstars, 20 symbiotic stars, 40 confirmed or suspected T Tauri stars, 16novae, 14 planetary nebulae, 11 P Cygni stars, 9 Bep stars, 87 confirmedor suspected Wolf-Rayet stars, and 26 'peculiar' stars. Two new Tassociations are discovered, one in Lupus and one in Chamaeleon. Objectswith variations in continuum or H-alpha intensity are noted, and thedistribution by spectral type is analyzed. It is found that the skydistribution of these emission-line stars shows significantconcentrations in the region of the small Sagittarius cloud and in theCarina region.

A catalogue of new H-alpha emission stars in the eta Carinae nebula region.
Not Available

Yeni bir Makale Öner


Ýlgili Baðlantýlar

  • - Baðlantý Bulunamadý -
Yeni Bir Baðlantý Öner


sonraki gruplarýn üyesi:


Gözlemler ve gökölçümü verileri

Takýmyýldýz:Karina
Sað Açýklýk:10h25m16.19s
Yükselim:-58°52'20.9"
Görünürdeki Parlaklýk:6.996
Uzaklýk:259.067 parsek
özdevim Sað Açýklýk:-17.1
özdevim Yükselim:6.6
B-T magnitude:6.879
V-T magnitude:6.987

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 90490
TYCHO-2 2000TYC 8612-76-1
USNO-A2.0USNO-A2 0300-09575930
HIPHIP 51011

→ VizieR 'den daha fazla katalog ve tanýmlama isteyin