2015A&A...583A..73B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST08:10:08

2015A&A...583A..73B - Astronomy and Astrophysics, volume 583A, 73-73 (2015/11-1)

A color-period diagram for the open cluster M 48 (NGC 2548), and its rotational age.

BARNES S.A., WEINGRILL J., GRANZER T., SPADA F. and STRASSMEIER K.G.

Abstract (from CDS):

Rotation periods are increasingly being used to derive ages for cool single field stars. Such ages are based on an empirical understanding of how cool stars spin down, acquired by constructing color-period diagrams (CPDs) for a series of open clusters. Our main aims here are to construct a CPD for M48, to compare this with other clusters of similar age to check for consistency, and to derive a rotational age for M48 using gyrochronology. We monitored M48 photometrically for over 2months with AIP's STELLAI 1.2m telescope and the WiFSIP 4K imager in Tenerife. Light curves with 3mmag precision for bright (V∼14mag) stars were produced and then analysed to provide rotation periods. A cluster CPD has then been constructed. We report 62 rotation periods for cool stars in M48. The CPD displays a clear slow/I-sequence of rotating stars, similar to those seen in the 625Myr-old Hyades and 590Myr-old Praesepe clusters, and below both, confirming that M48 is younger. A similar comparison with the 250Myr-old M34 cluster shows that M48 is older and does not possess any fast/C-sequence G or earlyK stars like those in M34, although relatively fast rotators do seem to be present among the late-K and M stars. A more detailed comparison of the CPD with rotational evolution models shows that the cluster stars have a mean age of 450Myr, and its (rotating) stars can be individually dated to ±117Myr (26%). Much of this uncertainty stems from intrinsic astrophysical spread in initial periods, and almost all stars are consistent with a single age of 450Myr. The gyro-age of M48 as a whole is 450±50Myr, in agreement with the previously determined isochrone age of 400±100Myr.

Abstract Copyright:

Journal keyword(s): stars: activity - stars: rotation - stars: late-type - stars: evolution - open clusters and associations: individual: M 48 - stars: variables: general

VizieR on-line data: <Available at CDS (J/A+A/583/A73): table2.dat tablea1.dat>

Status at CDS:   All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 17

goto Full paper

goto View the reference in ADS

Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 1039 OpC 02 42 05 +42 45.7           ~ 370 0
2 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2979 0
3 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2654 0
4 M 37 OpC 05 52 18 +32 33.2   6.19 5.6     ~ 332 2
5 NGC 2168 OpC 06 08 54 +24 20.0           ~ 457 0
6 NGC 2516 OpC 07 58 04 -60 45.2           ~ 587 0
7 NGC 2548 924 * 08 12 58.4954785343 -05 51 06.275427591   11.21 11.03     A2 9 0
8 NGC 2548 OpC 08 13 43 -05 45.0           ~ 142 0
9 HD 68779 * 08 13 44.2257266356 -05 48 48.900422070   9.16 9.10     A1 14 0
10 BD-05 2451 * 08 14 26.3584176283 -05 44 34.583879460   11.08 9.93     G8 9 0
11 BD-05 2452 * 08 14 28.1257738136 -05 42 16.148545776   10.49 9.47     K0 14 0
12 NGC 2632 OpC 08 40 24 +19 40.0           ~ 1224 0
13 IC 2391 OpC 08 40 32 -53 02.0           ~ 714 0
14 IC 2602 OpC 10 42 58 -64 24.0           ~ 549 0
15 IC 4756 OpC 18 38 31.2 +05 29 24           ~ 199 0
16 NGC 6811 OpC 19 37 17 +46 23.3   7.47 6.8     ~ 250 0
17 NGC 6819 OpC 19 41 18 +40 11.2   8.21 7.3     ~ 465 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...583A..73B and select 'bookmark this link' or equivalent in the popup menu


2020.07.13-08:10:08

© Université de Strasbourg/CNRS

    • Contact