Results 51 to 60 of about 4,407 (194)

Blue straggler stars in dwarf spheroidal galaxies [PDF]

, 2007
Blue straggler star (BSS) candidates have been observed in all old dwarf spheroidal galaxies (dSphs), however whether or not they are authentic BSSs or young stars has been a point of debate.
Aparicio, Bailyn, Battaglia, Beers, Bellazzini, Benz, Benz, Bonanos, Carney, Carney, Carrera, Chabrier, Davies, Davies, E. Ripamonti, E. Tolstoy, Ferraro, Ferraro, Ferraro, Ferraro, Ferraro, Freeman, Freitag, Fusi Pecci, G. Battaglia, Girardi, Harbeck, Hernandez, Hurley, Hurley, Hurley-Keller, Ideta, Irwin, Irwin, Irwin, Irwin, Irwin, Kleyna, Kleyna, Landolt, Lanzoni, Lanzoni, Lee, Leonard, Lombardi, M. J. Irwin, M. Mapelli, Mapelli, Mapelli, Mateo, Mateo, Mateo, Mayer, McCrea, McMahon, Momany, Monkiewicz, Monkman, Naylor, Piatek, Pols, S. Sigurdsson, Sabbi, Sandage, Sigurdsson, Sigurdsson, Sills, Sills, Sills, Ségall, Tian, Tolstoy, Walker, Warren, Wilkinson, Zaggia, Zinnecker   +76 more
core   +5 more sources

Modeling blue stragglers in young clusters [PDF]

Research in Astronomy and Astrophysics, 2011
In this paper, a grid of the binary evolution models are calculated for the study of blue straggler (BS) population in intermediate age ($\log Age$=7.85-8.95) star clusters. The BS formation via mass transfer and merging is studied systematically using our models.
Lu, Pin, Deng, Li-Cai, Zhang, Xiao-Bin
openaire   +2 more sources

The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars

The Astrophysical Journal
The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply ...
Li Wang, Licai Deng, Xiaoying Pang, Long Wang, Richard de Grijs, Antonino P. Milone, Chengyuan Li   +6 more
doaj   +1 more source

Blue Stragglers in Low-Luminosity Star Clusters

, 2005
We examine the blue straggler populations of 13 low-luminosity (M_V_t >~ -6) globular clusters and 2 old open clusters. These clusters test blue straggler formation in environments intermediate between higher luminosity (and usually higher density ...
Eric L. Sandquist, Ferraro F. R.
core   +2 more sources

Census of Blue Straggler Stars in Distant Open Clusters and Maximum Fractional Mass Excess of Open Cluster Blue Straggler Stars

The Astronomical Journal
We identified blue straggler stars (BSSs) in 53 open clusters utilizing data from Gaia DR3. Most of these clusters are situated in the outer regions of the Galactic disk, encompassing structures such as the warp and the Outer arm.
Qian Cui, Zhihong He, Shunhong Deng, Liming Peng, Chunyan Li, Yangping Luo, Kun Wang   +6 more
doaj   +1 more source

The Blue Stragglers of the Old Open Cluster NGC 188

, 2014
The old (7 Gyr) open cluster NGC 188 has yielded a wealth of astrophysical insight into its rich blue straggler population. Specifically, the NGC 188 blue stragglers are characterized by: A binary frequency of 80% for orbital periods less than $10^4 ...
A. A. Bonačić Marinović, A. A. Tokovinin, A. M. Geller, A. M. Geller, A. M. Geller, A. M. Geller, A. M. Geller, A. R. Sandage, A. Sarajedini, A. Sills, A. Sills, B. Paczyński, B. Paxton, B. W. Carney, B. W. Carney, C. A. Nelson, C.-P. Lajoie, D. Raghavan, D. W. Latham, E. Glebbeek, E. L. Sandquist, G. Mathys, H. B. Perets, H. B. Perets, H. L. Johnson, I. Platais, J. Ahumada, J. Ahumada, J. G. Hills, J. R. Hurley, J. R. Hurley, J. R. Hurley, J.-C. Passy, J.F. Sepinsky, K. Belczynski, M. Berg van den, M. S. Hjellming, M. W. McCrea, N. Leigh, N. M. Gosnell, N. Soker, P. Bergeron, P. Gondoin, P. J. T. Leonard, P. Kroupa, P. Marigo, P. P. Eggleton, R. A. Mardling, R. D. Mathieu, R. D. Mathieu, R. Kippenhahn, R.F. Webbink, S. J. Aarseth, S. Meibom, T. E. Woods, T. Mazeh, V. P. Goranskij, W. Landsman, X. Chen, X. Chen   +59 more
core   +1 more source

Hubble Space Telescope Observations of the Oldest Star Clusters in the LMC [PDF]

, 1999
We present V, V-I color-magnitude diagrams (CMDs) for three old star clusters in the Large Magellanic Cloud (LMC): NGC 1466, NGC 2257 and Hodge 11. Our data extend about 3 magnitudes below the main-sequence turnoff, allowing us to determine accurate ...
Andersen J., Bower R., Brocato E., Buonanno R., Chaboyer B., Feast M. W., Fernley J., Frenk C. S., Goodwin S. P., James E. Hesser, Jennifer A. Johnson, Michael Bolte, Mighell K. J., Peter B. Stetson, Pont F., Rachel S. Somerville, Stetson P. B., Testa V.   +17 more
core   +2 more sources

Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution

The Astrophysical Journal
Identifying bifurcated blue straggler (BS) sequences in color–magnitude diagrams (CMDs) of star clusters has long been regarded as a powerful diagnostic for distinguishing different BS formation mechanisms.
Li Wang, Dengkai Jiang, Chengyuan Li, Licai Deng, Antonino P. Milone, Long Wang   +5 more
doaj   +1 more source

Fast-rotating blue straggler stars in the globular cluster NGC 1851

Astronomy & Astrophysics
We studied the rotational velocities of a sample of blue straggler stars (BSSs) and reference stars belonging to the Galactic globular cluster NGC 1851 using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT. After field decontamination
Billi A., Monaco L., Ferraro F. R., Mucciarelli A., Lanzoni B., Cadelano M., Trangolao I.   +6 more
doaj   +1 more source

Investigating 16 Open Clusters in the Kepler/K2–Gaia DR3 Field. I. Membership, Binary Systems, and Rotation

The Astrophysical Journal Supplement Series, 2023
Using data from Gaia Data Release 3 and Kepler/K2, we present a catalog of 16 open clusters with ages ranging from 4–4000 Myr that provides detailed information on membership, binary systems, and rotation. We assess the memberships in 5D phase space, and
Liu Long, Shaolan Bi, Jinghua Zhang, Xianfei Zhang, Liyun Zhang, Zhishuai Ge, Tanda Li, Xunzhou Chen, YaGuang Li, LiFei Ye, TianCheng Sun, JianZhao Zhou   +11 more
doaj   +1 more source