SIMBAD references

2014ApJ...784...57W - Astrophys. J., 784, 57 (2014/March-3)

Characterization of the Praesepe star cluster by photometry and proper motions with 2MASS, PPMXL, and Pan-STARRS.

WANG P.F., CHEN W.P., LIN C.C., PANDEY A.K., HUANG C.K., PANWAR N., LEE C.H., TSAI M.F., TANG C.-H., GOLDMAN B., BURGETT W.S., CHAMBERS K.C., DRAPER P.W., FLEWELLING H., GRAV T., HEASLEY J.N., HODAPP K.W., HUBER M.E., JEDICKE R., KAISER N., KUDRITZKI R.-P., LUPPINO G.A., LUPTON R.H., MAGNIER E.A., METCALFE N., MONET D.G., MORGAN J.S., ONAKA P.M., PRICE P.A., STUBBS C.W., SWEENEY W., TONRY J.L., WAINSCOAT R.J. and WATERS C.

Abstract (from CDS):

Membership identification is the first step in determining the properties of a star cluster. Low-mass members in particular could be used to trace the dynamical history, such as mass segregation, stellar evaporation, or tidal stripping, of a star cluster in its Galactic environment. We identified member candidates of the intermediate-age Praesepe cluster (M44) with stellar masses ∼0.11-2.4 M, using Panoramic Survey Telescope And Rapid Response System and Two Micron All Sky Survey photometry, and PPMXL proper motions. Within a sky area of 3° radius, 1040 candidates are identified, of which 96 are new inclusions. Using the same set of selection criteria on field stars, an estimated false positive rate of 16% was determined, suggesting that 872 of the candidates are true members. This most complete and reliable membership list allows us to favor the BT-Settl model over other stellar models. The cluster shows a distinct binary track above the main sequence, with a binary frequency of 20%-40%, and a high occurrence rate of similar mass pairs. The mass function is consistent with that of the disk population but shows a deficit of members below 0.3 solar masses. A clear mass segregation is evidenced, with the lowest-mass members in our sample being evaporated from this disintegrating cluster.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual: Praesepe - stars: kinematics and dynamics - stars: luminosity function, mass function

VizieR on-line data: <Available at CDS (J/ApJ/784/57): table1.dat>

Simbad objects: 1032

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2019.08.18-22:18:53

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