Home arrow S5: Star Clusters in the Era of Large Surveys

SYMPOSIUM 5: Star Clusters in the Era of Large Surveys


Stars form mainly in clustered mode. Over time, these clusters evaporate and/or disrupt, enriching the general field population. Cluster lifetimes can vary enormously, ranging from a large population of short lived individuals that get shattered in a few Myr while emerging from their parent clouds, to old globular clusters that have been inhabiting the halo of Milky Way for more than 12 Gyr.
These characteristics confer multiple roles to the star cluster population. As stellar birth sites they are laboratories for studying local and large scale star formation processes, and later on, stellar evolution. Emergence from their gaseous and dusty cocoons highlights the interaction of stellar systems with the interstellar medium (ISM): If on one side, stellar winds will blow away the surrounding medium, on the other side, this sweeping of the ISM will have dramatic consequences on the kinematics of cluster stars, affect a cluster's morphology, star loss to the field and even its survival. Analysis of the Galactic cluster population, either as a whole or in age groups has already provided wealth of insight on the morphology and dynamics of spiral arms, the various scales of Milky Way (disk heights, distance to Galactic centre, extension of the warp, flare, and others), Galactic rotation, formation and development of the Milky Way.

Estimates indicate that the Milky Way has around 200 billion stars (number growing every few years) and presently hosts ~10^5 or more star clusters. However, only about 2500 open clusters have been identified and constitute a sample affected by several well known selection effects. Less than a half of these clusters has actually been studied, and this subset suffers from further selection biases.

Given the estimated number of present day clusters, one would expect that available all sky surveys would have produced many thousands of identifications. Yet, only ~1300 clusters, i.e. 1/3 of the optically visible clusters (~600 of 1800) and most of the infrared clusters (~700), have been discovered through automatic or semi-automatic searches on large scale survey data products from ground based (mainly DSS, 2MASS and GLIMPSE), and space (Hipparcos) endeavours.  Expectations are that the new generation of all sky surveys (UKIDSS, the VISTA-based VHS and VVV, and Gaia) will add many more.

This symposium will be a meeting point for discussing what and how can recent, on-going and planned large area surveys from ground and space, availability of efficient reduction pipelines, development of analysis algorithms and access to databases around the world, contribute to produce a leap in this research field that has a strong European history.

Science topics to be addressed include:
- Cluster searches/census
- Clustered vs isolated star formation + large scale star formation +
enrichment of the field population
- Structure, populations and evolution of the Milky Way.
- Cluster dynamics (internal and within the Milky Way)
- Variability of stars in clusters (from time resolved surveys)
- Analysis techniques for large samples


More information at the symposium site: ./clusters


This e-mail address is being protected from spam bots, you need JavaScript enabled to view it (Portugal)
J.F. Alves (Austria)
J. Ascenso (Portugal)
J. Bouvier (France)
G. Carraro (ESO)
W.S. Dias (Brazil)
J. Drew (UK)
M. Gieles (UK)
V. Ivanov (ESO)
• Thursday, Sep 9

Session 1: Overview of recent, on-going and planned surveys. Cluster Searches

09:00 - Opening
09:05 - J. Drew (inv) -  "Optical digital galactic plane surveys and cluster science"
09:25 - V. Ivanov (inv) - "Census of Milky Way Star Clusters from Infrared Surveys"
09:45 - P. Frinchaboy - "SDSS-III/APOGEE: Detailed Abundances of Galactic Star Clusters"
10:00 - S. Hodgkin (inv) - "Towards uniformity in the photometric calibration of near infrared surveys"
10:15 - E. Glushkova - "Properties of Star Clusters Found and Investigated by Data from Large Surveys"
10:30 - Poster presentation by Session Chair

10:35 - Coffee Break

11:00-13:00 - JENAM 2010 Plenary session

Session 2: Star formation & evolution - I

14:30 - E. Moraux (inv) - "Large-scale optical surveys of open clusters"
14:45 - C. Alves de Oliveira - "Probing the low-mass end of the IMF in star-forming regions"
15:00 - N. Moeckel (inv) - "Dynamics in the embedded phase: accretion, collisions, contraction"
15:15 - A. Duarte Cabral - "Examining the properties and dynamics of young protoclusters:  striving to unravel the initial conditions and triggers of star formation"
15:30 - Poster presentation by Session Chair
15:40 - Discussion (20 min)

16:00 - Coffee Break

Session 3: Star formation & evolution - II

16:30 - E. Bressert (inv) - "Do All Stars in the Solar Neighbourhood Form in Dense Clusters?"
16:45 - S. Goodwin (inv) - "New measures for measuring structure in star clusters"
17:00 - G. Wuchterl (inv)  - The impact of formation on cluster chronology
17:15 - J. Stauffer (inv) - "Uncertainties in the Age Scale for Young Open Clusters and Moving Groups"
17:30 - R. Jeffries (inv) - "Ages and age spreads in young clusters"
17:45 - Poster presentation by Session Chair
17:55 -  Discussion (35 min)

18:30 - End of the day

• Friday, Sep 10

Session 4: Star formation & evolution - III

9:00 - G. Micela (inv) - "The relevance of X-ray surveys for the study of the properties of young open clusters"
9:15 - N. Wright - "Chandra observations of the massive young cluster Cygnus OB2"
9:30 - M. Messineo - "Young massive stellar clusters in the Milky Way: Quartet, GLIMPSE9 and Cl1813-178 clusters"
9:45 - P. Ventura (inv) - "Possible scenarios for the formation of multiple populations in Globular Clusters"
10:00 - Poster presentation by Session Chair
10:10 - Discussion (20 min)

10:30 - Coffee Break

11:00-13:00 - JENAM 2010 Plenary session

Session 5: The Milky Way and beyond

14:30 - J. Lépine (inv) - "Spiral structure and stellar populations in the solar neighbourhood"
14:45 - S. Randich (inv) - "Chemical properties of the open cluster population"
15:00 - D. Martínez-Delgado (inv) - Stellar Tidal Streams in the Milky Way: evidence for merger events in the Galactic disk?
15:15 - L. Eyer (inv) - "Time resolved surveys of stellar clusters"
15:30 - Poster presentationby Session Chair
15:40 - Discussion (20 min)

Session 6:  Technical challenges

16:30 - M. Netopil (inv) "Developments of the open cluster database WEBDA"
16:45 - C. Bailer-Jones (inv) "Bayesian inference of stellar parameters and interstellar extinction using parallaxes and multiband photometry"
17:00 - E. Bertin (inv) "AstrOmatic software in the era of large stellar photometric surveys"
17:15 - T. Naylor (inv) "Cluster parameter determinations for large datasets"
17:30 - I. Zolotukhin "Open Clusters Science in the Virtual Observatory era"
17:45 - Poster presentation by Session Chair
17:55 - Session and Final Discussion (35 min)

18:30 - End of Symposium

Posters (In random order for the moment. A few to be confirmed):

D. vande Putte - "A kinematic study of open clusters: implications for their  origin"
P. Vaisanen - "Super star clusters with adaptive optics in starburst galaxies"
S. Pfalzner - "The two massive cluster sequences"
B. Rochau - "A Subaru view on RSGC1"
R. Raddi - "Tracing the structure of the Perseus Arm with IPHAS"
C. V. Cardoso - "A deep photometric survey of the double cluster h and Chi Persei"
G. Marton - "YSO clusters on galactic infrared loops"
V. S. Béjar - "The substellar mass function of the Sigma Orionis cluster"
D. Villegas - "Globular Clusters in the ACS Virgo and Fornax Cluster Surveys"
G. Nikolov - "Star clusters in the SMC: Search for mass segregation"
S. Kaviraj - "UV bright globular clusters in M87: more evidence for super-He-rich stellar populations?"
P. S. Teixeira - "Spitzer's view of NGC2264's circumstellar disk population"
A. Di Cecco - "Are the metal-rich globular clusters younger than the metal-poor ones?"
F. Lopez Martinez - "Star-Disk Interaction in T Tauri Stars: Analysis of the MgII Lines”
J. Alves - "An empirical view on the formation of stellar clusters"
J. Bouvier - "Rotational evolution and lithium depletion in young stellar clusters"
M. Gieles - "Dynamical evolution of star clusters"
J. Ascenso - TBD ("IMF")
A. Messina - "Chromospheric activity and Lithium abundance in NGC3572, NGC3766, and NGC2516"
E. Stonkute - "Chemical composition of a kinematically identified stellar group in the Milky Way"
E. Amôres - "GALExtin: A VO-Service to estimate galactic interstellar extinction"
J. Fiestas - "Dynamical evolution of rotating globular clusters with embedded black holes"
G. Tautvaisiene - "CNO elements as tracers of stellar evolution in red clump stars of open clusters"
G. Nikolov - "Star clusters in the SMC: Search for mass segregation"
M. Kronberger - "New Milky Way star cluster candidates from DSS and 2MASS"
P. Cruz - "The metallicity gradient in the Galactic disk revealed by Cepheids and open clusters"
R. I. Anderson - "Populations of Variable Stars in Open Clusters"
R. Kurtev - "(VVV) Study of the young Milky Way star clusters: Mercer35, 83, 69, 53, 28 and 70"
J. Borissova - "(VVV) Search for new young clusters towards the star forming regions"
E. Puzeras - "Chemical properties of the Hipparcos red clump"
C. Paladini - "A detailed spectroscopic analysis of the open cluster NGC 5460"
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