Information on Service 'MWSC Star Cluster Extension 2014a'

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MWSC-e14a ("MWSC extension 2014a") is a catalogue of 139 new open clusters at high Galactic latitudes (|b|>20 deg) including lists of candidate members. It extends the Kharchenko et al. 'Catalog of Milky Way Star Clusters'. The target list was compiled as density enhancements found in the 2MASS point source catalogue. For confirmed clusters we determined a homogeneous set of astrophysical parameters such as membership, angular radii of the main morphological parts, proper motion, distance, reddening, age, and tidal parameters.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Global Survey of Star Clusters in the Milky Way. III. 139 new open clusters at high Galactic latitudes'

Overview

You can access this service using:

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Other services provided on the underlying data include:

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
DEC Delta (ICRS) Declination (ICRS decimal) deg pos.eq.dec
dist D Distance from the Sun pc pos.distance;pos.heliocentric
fe_h [Fe/H] Metallicity [Fe/H]; this is copied from 2013arXiv1309.4325C or 2012A&A...539A.125D. Data for globular clusters is taken from the revised Harris (1996) catalogue, edition 2010, or newly determined. N/A phys.abund.Fe
hscs_pos Position/Name Coordinates (as h m s, d m s or decimal degrees), or SIMBAD-resolvable object N/A N/A
hscs_sr Search radius Search radius in arcminutes N/A N/A
logt log(T) Logarithm of average age log(yr) time.age;stat.mean
MAXREC Match limit Maximum number of records returned. Pass 0 to retrieve service parameters. N/A N/A
name Common Name NGC, IC or other common designation N/A meta.id
object_type Source Classification Object type N/A src.class
ot_certain Type Certain? True if the object type is confirmed, false if object type has candidate status. N/A meta.code;src.class
RA Alpha (ICRS) Right Ascension (ICRS decimal) deg pos.eq.ra
rcluster R(cluster) Angular radius of the cluster deg phys.angSize;src
recno Id MWSC sequential number (cluster catalog number). N/A meta.id;meta.main
RESPONSEFORMAT Output Format File format requested for output. N/A meta.code.mime
SR Search Radius Search radius deg N/A
VERB Verbosity Exhaustiveness of column selection. VERB=1 only returns the most important columns, VERB=2 selects the columns deemed useful to the average user, VERB=3 returns a table with all available columns. N/A N/A

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
_r Dist. Distance to cone center deg pos.distance
col_ex_opt E(B-V) Colour excess in (B-V) mag phot.color.excess;phot.color;em.opt.B;em.opt.V
confirmation_flag Cluster? Is this object a stellar cluster? 'dupe' indicates the object coincides with another cluster. N/A N/A
dej2000 Dec Adopted cluster centre in Dec J2000.0 deg pos.eq.dec;meta.main
dist D Distance from the Sun pc pos.distance;pos.heliocentric
e_pm e_PM Error of proper motion deg/yr stat.error;pos.pm;pos.eq.ra;stat.mean
e_rv Err(RV) Error of RV km/s stat.error;spect.dopplerVeloc;pos.heliocentric;stat.mean
fe_h [Fe/H] Metallicity [Fe/H]; this is copied from 2013arXiv1309.4325C or 2012A&A...539A.125D. Data for globular clusters is taken from the revised Harris (1996) catalogue, edition 2010, or newly determined. N/A phys.abund.Fe
glat b Galactic latitude deg pos.galactic.lat
glon l Galactic longitude deg pos.galactic.lon
kingk K King normalization factor (a measure of the central density of the cluster, see 2007A&A...468..151P pc**-2 stat.fit.param
logt log(T) Logarithm of average age log(yr) time.age;stat.mean
members Members Link to stars that are candiadate members of this cluster N/A meta.ref.url
n1s_center |Center| Number of most probable (1sigma) members within R(center); these are the stars used to compute the average proper motion. N/A meta.number
n1s_cluster |Cluster| Number of most probable (1sigma) members within R(cluster) N/A meta.number
n1s_core |Core| Number of most probable (1sigma) members within R(core) N/A meta.number
n_star N Number of stars in MWSC sky area. N/A meta.number
name Common Name NGC, IC or other common designation N/A meta.id
note_text Note The text of the note for an object. N/A meta.note
object_type Source Classification Object type N/A src.class
pmde PM(Dec) Average proper motion in Declination deg/yr pos.pm;pos.eq.dec;stat.mean
pmra PM(RA) Average proper motion in RA*cos(DE) deg/yr pos.pm;pos.eq.ra;stat.mean
raj2000 RA Adopted cluster centre in RA J2000.0 deg pos.eq.ra;meta.main
rc R_King King core radius pc phys.size.radius
rcenter R(center) Angular radius of the central part deg phys.angSize;src
rcluster R(cluster) Angular radius of the cluster deg phys.angSize;src
rcore R(core) Angular radius of the core deg phys.angSize;src
recno Id MWSC sequential number (cluster catalog number). N/A meta.id;meta.main
rt R_Tidal King tidal radius pc phys.size.radius
rv RV Average radial velocity km/s spect.dopplerVeloc;pos.heliocentric;stat.mean
source Source Source for MWSC list and input parameters N/A meta.ref
source_type Src type Object type from source Note o N/A src.class

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
members Members Link to stars that are candiadate members of this cluster N/A meta.ref.url 1
recno Id MWSC sequential number (cluster catalog number). N/A meta.id;meta.main 1
name Common Name NGC, IC or other common designation N/A meta.id 1
confirmation_flag Cluster? Is this object a stellar cluster? 'dupe' indicates the object coincides with another cluster. N/A N/A 1
source Source Source for MWSC list and input parameters N/A meta.ref 1
source_type Src type Object type from source Note o N/A src.class 1
n_star N Number of stars in MWSC sky area. N/A meta.number 1
raj2000 RA Adopted cluster centre in RA J2000.0 deg pos.eq.ra;meta.main 1
dej2000 Dec Adopted cluster centre in Dec J2000.0 deg pos.eq.dec;meta.main 1
note_text Note The text of the note for an object. N/A meta.note 1
rcore R(core) Angular radius of the core deg phys.angSize;src 5
rcenter R(center) Angular radius of the central part deg phys.angSize;src 5
pmra PM(RA) Average proper motion in RA*cos(DE) deg/yr pos.pm;pos.eq.ra;stat.mean 5
pmde PM(Dec) Average proper motion in Declination deg/yr pos.pm;pos.eq.dec;stat.mean 5
rv RV Average radial velocity km/s spect.dopplerVeloc;pos.heliocentric;stat.mean 5
_r Dist. Distance to cone center deg pos.distance 10
object_type Source Classification Object type N/A src.class 15
e_pm e_PM Error of proper motion deg/yr stat.error;pos.pm;pos.eq.ra;stat.mean 15
e_rv Err(RV) Error of RV km/s stat.error;spect.dopplerVeloc;pos.heliocentric;stat.mean 15
n1s_core |Core| Number of most probable (1sigma) members within R(core) N/A meta.number 15
n1s_center |Center| Number of most probable (1sigma) members within R(center); these are the stars used to compute the average proper motion. N/A meta.number 15
n1s_cluster |Cluster| Number of most probable (1sigma) members within R(cluster) N/A meta.number 15
dist D Distance from the Sun pc pos.distance;pos.heliocentric 15
col_ex_opt E(B-V) Colour excess in (B-V) mag phot.color.excess;phot.color;em.opt.B;em.opt.V 15
logt log(T) Logarithm of average age log(yr) time.age;stat.mean 15
rc R_King King core radius pc phys.size.radius 15
rt R_Tidal King tidal radius pc phys.size.radius 15
kingk K King normalization factor (a measure of the central density of the cluster, see 2007A&A...468..151P pc**-2 stat.fit.param 15
fe_h [Fe/H] Metallicity [Fe/H]; this is copied from 2013arXiv1309.4325C or 2012A&A...539A.125D. Data for globular clusters is taken from the revised Harris (1996) catalogue, edition 2010, or newly determined. N/A phys.abund.Fe 15
glon l Galactic longitude deg pos.galactic.lon 20
glat b Galactic latitude deg pos.galactic.lat 20
rcluster R(cluster) Angular radius of the cluster deg phys.angSize;src 20
ot_certain Type Certain? True if the object type is confirmed, false if object type has candidate status. N/A meta.code;src.class 25
n_rv n_RV Number of stars used for RV km/s meta.number;spect.dopplerVeloc;pos.heliocentric;stat.mean 25
dist_mod Ks-M_Ks Apparent distance modulus in Ks mag phot.mag.distMod 25
col_ex_j E(J-Ks) Colour excess in (J-Ks) mag phot.color.excess;phot.color;em.ir.J;em.ir.K 25
col_ex_h E(J-H) Colour excess in (J-H) mag phot.color.excess;phot.color;em.ir.J;em.ir.H 25
delta_h ΔH Correction to H mag of fitted isochrone, empirically introduced to achieve a better fit in the Ks vs. J-H CMD. (see 2012A&A...543A.156K). mag phot.mag;arith.diff 25
e_logt Err.(log(T)) Error in logarithm of average age log(yr) stat.error;time.age 25
nt N(T) Number of stars used for log(T) calculation N/A meta.number 25
e_rc Err(R_King) Error of King core radius pc stat.error;phys.size.radius 25
e_rt Err(R_Tidal) Error of King tidal radius pc stat.error;phys.size.radius 25
e_kingk Err(K) Error of King normalization factor pc**-2 stat.error;stat.fit.param 25
e_fe_h Err([Fe/H]) Error of Metallicity N/A stat.error;phys.abund.Fe 25
n_fe_h N([Fe/H]) Number of objects in [Fe/H] calculation. N/A meta.number 25

VOResource XML (that's something exclusively for VO nerds)

Note o

The values in the source_type column have the following meanings:

ass stellar association
ast Dias: possible asterism/dust hole/star cloud
dub Dias: dubious, objects considered doubtful by the DSS images inspection
emb embedded open cluster/cluster associated with nebulosity
glo globular cluster/possible globular cluster
irc infrared cluster
irg infrared stellar group
mog Dias: possible moving group
non Dias: "non-existent NGC"/ objects not found in DSS images inspection
rem Possible cluster remnant
var clusters with variable extinction