Located in the dwarf galaxy Sculptor somelight-years away, the star has a chemical make-up
Zoom Out Reset image size Figure 2. Stars for observation were selected from within the area outlined by the dashed box, which includes bulge giants with a wide range of metallicity and excludes most of the foreground disk dwarfs.
Standard image High-resolution image Export PowerPoint slide To make our selection cuts, we first dereddened the stars using the mean Schlegel et al. For the fiber allocations we then selected about stars in each one-magnitude interval of I, from about 13 to The integration times for these three magnitude intervals were 60 minutes, minutes, and minutes, respectively.
We selected the optimal sky subtraction option which gives much better sky subtraction, and used a 4th order polynomial for fitting the calibration lamp lines. Radial velocities were obtained via cross correlation of the observed stellar spectra with synthetic spectra.
The best matching template to each observed star, as determined by the minimum error analysis via cross correlation, was chosen to determine the radial velocity. The heliocentric radial velocities were transformed to Galactocentric velocities.
The grid steps are K in Teff, 0.
Using our spectroscopic stellar parameters, we are able to select a clean sample of genuine clump giants. This sample can be further refined by using distances for our stars estimated from the derived stellar parameters.
For stars not in the clump, distances were estimated via fits to the Basti isochrones Cassisi et al. For the clump stars, the distance errors come from the uncertainties in 1 the interstellar reddening, 2 the clump absolute magnitude, and 3 the 2MASS apparent magnitude. These distance estimates allow us to exclude stars which are not in the region of the bulge.
In the following sections, we will discuss the magnitude distribution and kinematics of the split red clump seen in the bulge near its minor axis. From the three ARGOS survey fields on the minor axis of the bulge, we have a sample of confirmed red clump stars with known velocities, distances, and metallicities.
First, we would like to determine the metallicity range over which the split red clump is seen. The two higher-latitude fields m0m75 and m0m10 analyzed separately show very similar results and to increase the number of stars in our analysis, they are combined for this discussion: We use generalized histograms to avoid the effects of arbitrary bin boundaries in conventional histograms.
The generalized histograms clearly demonstrate the structure of the distribution. Zoom In Reset image size Figure 3. The vertical axis units for the bottom panel are arbitrary.
We will return to this point in our discussion of the metallicity components of the bulge M. The split red clump is very evident in the higher latitude sample, and appears to be absent in the m0m5 sample. Only stars with The bimodal magnitude distribution is seen clearly for the bulge and the model in the higher latitude fields but only weakly in the m0m5 field.
The vertical axis units are arbitrary. This model started as an isolated, axisymmetric galaxy with live disk and halo components, such that the disk is maximum Sackett ; Gerhard This is where the name Milky Way comes from. The origin of the Milky Way, according to the Creationist point of view, dates back to when God first created the universe.
The Milky Way is divided up into four overlapping parts called the halo, the bulge, the thick disk, and the thin disk. There are many myths and legends about the origin of the Milky Way, the crowd of stars that makes a distinctive bright streak across the night sky.
Ginkan Milky Way Find more words! Another word for Opposite of Meaning of Rhymes with Sentences with Find word forms Translate from English Translate to English Words With Friends Scrabble Crossword / Codeword Words starting with Words ending with Words containing exactly Words containing letters Pronounce Find conjugations Find names.
people. With these groups of manageable the instructor can involve the audience in activities and discussions as a normal part of every program.
The Milky Way is the galaxy that contains our Solar yunusemremert.com descriptor "milky" is derived from the galaxy's appearance from Earth: a band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked yunusemremert.com term Milky Way is a translation of the Latin via lactea, from the Greek γαλαξίας κύκλος (galaxías kýklos, "milky circle").
a Milky Way-like galaxy, we explore both the formation and the evolution of star clusters, tracking their orbits and the tidal ﬁeld they experience since their formation, in the Milky Way and its progenitors.
We particularly focus on the bimodality of globulars The origin of the Milky Way globular clusters 3 .