Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
New periodic variables from the Hipparcos epoch photometry
Two selection statistics are used to extract new candidate periodicvariables from the epoch photometry of the Hipparcos catalogue. Theprimary selection criterion is a signal-to-noise ratio. The dependenceof this statistic on the number of observations is calibrated usingabout 30000 randomly permuted Hipparcos data sets. A significance levelof 0.1 per cent is used to extract a first batch of candidate variables.The second criterion requires that the optimal frequency be unaffectedif the data are de-trended by low-order polynomials. We find 2675 newcandidate periodic variables, of which the majority (2082) are from theHipparcos`unsolved' variables. Potential problems with theinterpretation of the data (e.g. aliasing) are discussed.
| Determination of size, color indices, and spectral classes of stars in an area centered on R.A.=21h24m, Dec=+58.5deg.
Not Available
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
| Costellazione: | Cefeo |
| Ascensione retta: | 21h30m26.10s |
| Declinazione: | +58°18'58.1" |
| Magnitudine apparente: | 8.869 |
| Distanza: | 293.255 parsec |
| Moto proprio RA: | 0.2 |
| Moto proprio Dec: | -3.9 |
| B-T magnitude: | 9.159 |
| V-T magnitude: | 8.893 |
Cataloghi e designazioni:
|
