ASTRONOMY AND ASTROPHYSICS Photometric and kinematic studies of open star clusters
نویسنده
چکیده
We present CCD photometry and a proper motion study of the young open star cluster, NGC 581 (M 103). Fitting isochrones to the colour magnitude diagram, we found an age of 16 ± 4Myr and a distance of roughly 3 kpc for this cluster. The proper motion study identifies 77 stars of V = 14.5mag or brighter to be cluster members. We combine membership determination by proper motions and statistical field star subtraction to derive the IMF of the cluster and find a quite steep slope of Γ = −1.80.
منابع مشابه
Star Clusters in Pseudo-bulges of Spiral Galaxies
We present a study of the properties of the star-cluster systems around pseudo-bulges of late-type spiral galaxies using a sample of 11 galaxies with distances from 17 to 37 Mpc. Star clusters are identified from multiband HST ACS and WFPC2 imaging data by combining detections in 3 bands (F435W and F814W with ACS and F606W with WFPC2). The photometric data are then compared to population synthe...
متن کاملA MaxBCG Catalog of 13,823 Galaxy Clusters from the Sloan Digital Sky Survey
We present a catalog of galaxy clusters selected using the maxBCG redsequence method from Sloan Digital Sky Survey photometric data. This catalog includes 13,823 clusters with velocity dispersions greater than ≈400 km s, and is the largest galaxy cluster catalog assembled to date. They are selected in an approximately volume-limited way from a 0.5 Gpc region covering 7500 square degrees of sky ...
متن کاملX iv : a st ro - p h / 04 09 21 6 v 1 9 S ep 2 00 4 Masses of star clusters in the nuclei of bulge - less spiral galaxies
In the last decade star clusters have been found in the centers of spiral galaxies across all Hubble types. We here present a spectroscopic study of the exceptionally bright (10 – 10 L⊙) but compact (re ∼ 5 pc) nuclear star clusters in very late type spirals with UVES at the VLT. We find the velocity dispersions of the nine clusters in our sample to range from 13 to 34 km s. Using photometric d...
متن کاملAstronomy & Astrophysics An all - sky set of ( B ) − V − R photometric calibrators for Schmidt surveys ? GSPC 2 . 1 : First release
We publish 622 CCD photometric sequences in the Johnson-Kron-Cousins standard system, distributed both in the northern and southern hemispheres, useful for the calibration of photographic photometry of Schmidt survey plates. The collection and reduction of the CCD data presented here are part of a long-term program devoted to the construction of the Second Guide Star Photometric Catalog (GSPC-I...
متن کاملar X iv : a st ro - p h / 04 10 24 0 v 1 8 O ct 2 00 4 Clusters in the Luminous Giant H II Regions in M 101
We have obtained HST WFPC2 observations of three very luminous but morphologically different giant H II regions (GHRs) in M101, NGC5461, NGC5462 and NGC5471, in order to study cluster formation in GHRs. Images obtained in the F547M and F675W bands are used to identify cluster candidates and for photometric measurements, and images in the F656N band are used to show ionized interstellar gas. The...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999