Poчetna     Да почнемо     To Survive in the Universe    
Inhabited Sky
    News@Sky     Астро Фотографије     Колекција     Форум     Blog New!     FAQ(Често постављана питања     Штампа     Улогуј се  

TYC 2535-291-1


Садржај

Слике

Уплоадјуј своје слике

DSS Images   Other Images


Везани чланци

Vertical distribution of Galactic disk stars. IV. AMR and AVR from clump giants
We present the parameters of 891 stars, mostly clump giants, includingatmospheric parameters, distances, absolute magnitudes, spatialvelocities, galactic orbits and ages. One part of this sample consistsof local giants, within 100 pc, with atmospheric parameters eitherestimated from our spectroscopic observations at high resolution andhigh signal-to-noise ratio, or retrieved from the literature. The otherpart of the sample includes 523 distant stars, spanning distances up to1 kpc in the direction of the North Galactic Pole, for which we haveestimated atmospheric parameters from high resolution but lowsignal-to-noise Echelle spectra. This new sample is kinematicallyunbiased, with well-defined boundaries in magnitude and colours. Werevisit the basic properties of the Galactic thin disk as traced byclump giants. We find the metallicity distribution to be different fromthat of dwarfs, with fewer metal-rich stars. We find evidence for avertical metallicity gradient of -0.31 dex kpc-1 and for atransition at ~4-5 Gyr in both the metallicity and velocities. Theage-metallicity relation (AMR), which exhibits a very low dispersion,increases smoothly from 10 to 4 Gyr, with a steeper increase for youngerstars. The age-velocity relation (AVR) is characterized by thesaturation of the V and W dispersions at 5 Gyr, and continuous heatingin U.

Errata in the tape version of the MK classification extension catalogby P.M. Kennedy.
Not Available

Додај нови чланак


Линкови у сродству са темом

  • - Нема линкова -
Додај нови линк


Чланови следећих група \:


Посматрања и Астрометриски подаци

Сазвежђа:Ловачки пси
Ректацензија:13h19m26.40s
Deклинација:+31°55'50.8"
Apparent магнитуда:10.565
Proper motion RA:-16.7
Proper motion Dec:-15.6
B-T magnitude:11.88
V-T magnitude:10.674

Каталог и designations:
Proper имена   (Edit)
TYCHO-2 2000TYC 2535-291-1
USNO-A2.0USNO-A2 1200-07061758
HIPHIP 65003

→ Захтевај још каталога од VizieR