Results 51 to 60 of about 597,439 (330)
SEARCHING FOR Be STARS IN THE OPEN CLUSTER NGC 663 [PDF]
The Astronomical Journal, 2015 23 pages, 7 figures, accepted by ...
P. C. Yu (俞伯傑) +8 more
openaire +7 more sources
The Astrophysical Journal Supplement Series, 2023 Despite having data for over 10 ^9 stars from Gaia, less than 10 ^4 star clusters and candidates have been discovered. In particular, distant star clusters are rarely identified, due to the challenges posed by heavy extinction and great distance. However,
Zhihong He +7 more
doaj +1 more source
Pulsating B-type stars in the young open cluster h Persei (NGC 869) [PDF]
J.Phys.Conf.Ser.118:012068,2008, 2007 We announce the discovery of six Beta Cephei stars and many other variable stars in the young open cluster h Persei (NGC 869). The cluster seems to be very rich in variable B-type stars, similarly to its twin, Chi Persei (NGC 884).
arxiv +1 more source
The Astrophysical Journal Supplement Series, 1985 Rotational velocities and spectral types have been determined for Be stars in 12 open clusters in both the northern and the southern sky, and color-magnitude or H-R diagrams constructed for each from available photometric data. The location of the Be stars in the color-magnitude diagrams shows again that Be stars may exist in various evolutionary ...
openaire +2 more sources
Photometric and kinematic studies of open star clusters. III. NGC 4103, NGC 5281, and NGC 4755
, 2001 We present CCD photometry and proper motion studies of the three open star clusters NGC 4103, NGC 5281, and NGC 4755 (kappa Cru). By fitting isochrones to the colour magnitude diagrams, we found that all three objects are young open star clusters with ...
Ahumada +42 more
core +1 more source
Be phenomenon in open clusters: Results from a survey of emission-line stars in young open clusters [PDF]
, 2008 Emission-line stars in young open clusters are identified to study their properties, as a function of age, spectral type and their evolutionary state. 207 open star clusters were observed using slitless spectroscopy method and 157 emission stars were identified in 42 clusters.
arxiv +1 more source
Catching a Milky Way open cluster in its last breath [PDF]
, 2023 Theoretical models have suggested peculiar velocity dispersion profiles of star clusters facing dissolution. They predicted that, besides bound stars that still belong to the star cluster, and unbound ones already stripped off, there is an intermediate population of stars that having acquired the enough energy to escape the cluster are still within the
arxiv +1 more source
The Occurrence of Peculiar Stars in Open Clusters [PDF]
Symposium - International Astronomical Union, 1978 We have classified on the MK system a total of 455 stars in 12 open clusters and associations. The classification is based on wide (1.2 mm) spectra of two reciprocal dispersions (39, 128 Å mm−1) obtained with the Kitt Peak 2.1 m and 90 cm reflectors, respectively.
Helmut A. Abt, Hugo Levato
openaire +2 more sources
On the efficiency of field star capture by star clusters [PDF]
, 2007 An exciting recent finding regarding scaling relations among globular clusters is the so-called 'blue tilt': clusters of the blue sub-population follow a trend of redder colour with increasing luminosity. In this paper we evaluate to which extent field star capture over a Hubble time may explain the 'blue tilt'.
arxiv +1 more source
Open clusters: III. Fundamental parameters of B stars in NGC 6087, NGC 6250, NGC 6383 and NGC 6530. B type stars with circumstellar envelopes [PDF]
A&A 610, A30 (2018), 2017 Context. Stellar physical properties of star clusters are poorly known. Aims. Our goals are to perform a spectrophotometric study of the B star population in open clusters to derive accurate stellar parameters, search for the presence of circumstellar envelopes, and discuss the characteristics of these stars. Methods.
arxiv +1 more source