Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
UBVRI photometry of FKSZ stars. III UBVRI photometry in the Kron-Cousins system is presented for 118 starsin the Catalogue of Fundamental Faint Stars (Zverev, 1957) in thedeclination zone between -60 and -90 degrees. The observations were madebetween September, 1984 and March, 1987 at the European SouthernObservatory at La Silla, Chile. Tables of the photometric data aregiven, including star number, V magnitude, spectral types, and (B-V),(U-B), (V-R), and (R-I) color indices.
| Einstein Observatory magnitude-limited X-ray survey of late-type giant and supergiant stars Results are presented of an extensive X-ray survey of 380 giant andsupergiant stars of spectral types from F to M, carried out with theEinstein Observatory. It was found that the observed F giants orsubgiants (slightly evolved stars with a mass M less than about 2 solarmasses) are X-ray emitters at the same level of main-sequence stars ofsimilar spectral type. The G giants show a range of emissions more than3 orders of magnitude wide; some single G giants exist with X-rayluminosities comparable to RS CVn systems, while some nearby large Ggiants have upper limits on the X-ray emission below typical solarvalues. The K giants have an observed X-ray emission level significantlylower than F and F giants. None of the 29 M giants were detected, exceptfor one spectroscopic binary.
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
Costellazione: | Carena |
Ascensione retta: | 09h14m22.74s |
Declinazione: | -65°03'14.2" |
Magnitudine apparente: | 7.031 |
Distanza: | 161.29 parsec |
Moto proprio RA: | -29.4 |
Moto proprio Dec: | 7.2 |
B-T magnitude: | 8.419 |
V-T magnitude: | 7.146 |
Cataloghi e designazioni:
|