Home     Per cominciare     Sopravvivere Nell'Universo    
Inhabited Sky
    News@Sky     Astro Foto     La collezione     Forum     Blog New!     FAQ     Stampa     Login  

HD 3402


Contenuti

Immagini

Carica la tua immagine

DSS Images   Other Images


Articoli relazionati

Pulkovo compilation of radial velocities for 35495 stars in a common system.
Not Available

A catalog of K giants at the South Galactic Pole - Broadband and DDO photometry and radial velocities
We describe a sample of K giants at the South Galactic Pole, selected toexamine the chemical and kinematical properties of stars perpendicularto the galactic plane and to measure the local column density of thedisk. We report velocities, abundances, absolute magnitudes, andbroadband BV photometry for over 500 giants.

Local dark matter from a carefully selected sample
The precise data obtained by Flynn and Freeman (1991) on K giants at thesouth Galactic pole are used to analyze the amount of local dark matterin which the systematic effects can be modeled easily and evaluatedaccurately. The method of Bahcall (1984) is employed to solve theself-consistent equations for the distribution of dark matter. TheK-giant survey is found to provide significant evidence for disk darkmatter. Taking into account all recognized sources of error using astatistical test devised by Gould (1989, 1990), a model with no darkmatter is inconsistent with the data at the 86-percent confidence level.The best-fit P-model (in which dark matter is distributed proportionallyto known matter) has 53 percent more dark matter than visible matter.

Spectroscopic studies of Wolf-Rayet stars. III - The WC subclass
Wolf-Rayet (W-R) stars, which are the descendants of massive O-typestars, can be subdivided into three groups depending on their spectralappearance. These groups include the nitrogen class (WN), the carbonclass (WC), and the oxygen class (WO). The present paper is concernedwith the WC stars. The assignment of WC subtypes has been based onvisual inspections of photographic plates. One of the aims of this studyis related to the quantification of the visual estimates. The measuredratios of equivalent widths and the FWHM of the 4650 A line for Galacticand LMC stars are presented, and the reclassification of some stars isproposed on this basis. In particular, it is shown that the majority ofthe LMC WC stars should logically be classified WC4 instead of WC5.Comments on individual stars are provided, and terminal velocities arediscussed. It is attempted to give a complete overview of the mostimportant spectroscopic features of the WC stars in the optical region.

Sottometti un nuovo articolo


Link relazionati

  • - Nessun link trovato -
Sottometti un nuovo link


Membro dei seguenti gruppi:


Osservazione e dati astrometrici

Costellazione:Balena
Ascensione retta:00h36m43.71s
Declinazione:-17°47'48.4"
Magnitudine apparente:8.335
Distanza:362.319 parsec
Moto proprio RA:10.6
Moto proprio Dec:-32.3
B-T magnitude:9.797
V-T magnitude:8.456

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 3402
TYCHO-2 2000TYC 5847-697-1
USNO-A2.0USNO-A2 0675-00236249
HIPHIP 2895

→ Richiesta di ulteriori cataloghi da VizieR