# The distance to the young open cluster Westerlund 2

@article{Carraro2013TheDT,
title={The distance to the young open cluster Westerlund 2},
author={Giovanni Carraro and David Gerald Turner and D. Majaess and G. Baume},
journal={Astronomy and Astrophysics},
year={2013},
volume={555}
}
• Published 10 September 2012
• Physics
• Astronomy and Astrophysics
A new X-ray, UBVRIc ,a ndJHKs study of the young cluster Westerlund 2 was undertaken to resolve discrepancies tied to the cluster’s distance. Existing spectroscopic observations for bright cluster members and new multi-band photometry imply a reddening relation toward Westerlund 2 described by EU−B/EB−V = 0.63 + 0.02 EB−V . Variable-extinction analyses for Westerlund 2 and nearby IC 2581 based upon spectroscopic distance moduli and ZAMS fitting yield values of RV = AV /EB−V = 3.88±0.18 and 3.77…

## Figures and Tables from this paper

Extinction in the Star Cluster SAI 113 and Galactic Structure in Carina
• Physics
• 2017
Photometric CCD UB VI C photometry obtained for 4860 stars surrounding the embedded southern cluster SAI 113 (Skiff 8) is used to examine the reddening in the field and derive the distance to the
The environment around the young massive star cluster RSGC 1 and HESS J1837−069
• Physics
• 2014
We report on Mopra observations toward the young massive star cluster RSGC 1, adjoined by, and possibly associated with the gamma-ray source HESS J1837-069. We measure the CO (J=1-0) distribution
Reddening, distance, and stellar content of the young open cluster Westerlund 2
• Physics
• 2015
We present deep $UBVI_C$ photometric data of the young open cluster Westerlund 2. An abnormal reddening law of $R_{V,cl}=4.14\pm0.08$ was found for the highly reddened early-type members ($E(B-V)\geq The Massive Star-Forming Regions Omnibus X-Ray Catalog, Second Installment • Physics • 2018 We present the second installment of the Massive Star-forming Regions (MSFRs) Omnibus X-ray Catalog (MOXC2), a compilation of X-ray point sources detected in Chandra/ACIS observations of 16 Galactic High-resolution radio emission from RCW 49/Westerlund 2 • Physics • 2013 Aims. The HII region RCW 49 and its ionizing cluster form an extensive, complex region that has been widely studied at infrared (IR) and optical wavelengths. The Molonglo 843 MHz and Australia Anchors for the cosmic distance scale: the Cepheid QZ Normae in the open cluster NGC 6067 • Physics • 2013 Cepheids are key to establishing the cosmic distance scale. Therefore it’s important to assess the viability of QZ Nor, V340 Nor, and GU Nor as calibrators for Leavitt’s law via their purported Spatial distribution of Galactic Wolf-Rayet stars and implications for the global population • Physics, Geology • 2015 We construct revised near-infrared absolute magnitude calibrations for 126 Galactic Wolf-Rayet (WR) stars at known distances, based in part upon recent large scale spectroscopic surveys. Application Stellar populations in the Carina region: The Galactic plane at l = 291 • Physics • 2016 Previous studies of the Carina region have revealed its complexity and richness as well as a significant number of early-type stars. In many cases, these studies only concentrated on the central A High-Resolution Multiband Survey of Westerlund 2 With the Hubble Space Telescope. II. Mass accretion in the Pre-Main Sequence Population • Physics • 2016 We present a detailed analysis of the pre-main-sequence (PMS) population of the young star cluster Westerlund~2 (Wd2), the central ionizing cluster of the HII region RCW 49, using data from a high Establishing the Galactic Centre distance using VVV Bulge RR Lyrae variables • Physics • 2018 This study’s objective was to exploit infrared VVV (VISTA Variables in the Via Lactea) photometry for high latitude RRab stars to establish an accurate Galactic Centre distance. RRab candidates were ## References SHOWING 1-10 OF 44 REFERENCES WR 38/38a and the ratio of total-to-selective extinction in Carina A reanalysis of the (seemingly very distant) open cluster Shorlin 1, the group of stars associated with WR 38 and WR 38a, is made on the basis of existing UBV and JHKs observations for cluster A UBVI AND uvbyCaHβ ANALYSIS OF THE INTERMEDIATE-AGE OPEN CLUSTER, NGC 5822 • Physics • 2011 NGC 5822 is a richly populated, moderately nearby, intermediate-age open cluster covering an area larger than the full moon on the sky. A CCD survey of the cluster on the UBVI and uvbyCaHβ systems The star cluster Collinder 232 in the Carina complex and its relation to Trumpler 14/16 , • Physics • 2004 In this paper we present and analyze new CCD UBVRI photometry down to$V\approx21\$ in the region of the young open cluster Collinder 232, located in the Carina spiral arm, and discuss its
NEW UBV PHOTOMETRY FOR THE OPEN CLUSTER STOCK 14 AND ITS CEPHEID VARIABLE V810 CEN (=HR 4511).
New UBV photometry is presented for stars brighter than V of about 14 lying in the central portion of the open cluster Stock 14. These data help to strengthen the cluster main-sequence fit, and
Does Collinder 236 host a Cepheid calibrator
• Physics
• 2009
Photoelectric UBV photometry and star counts are presented for the previously unstudied open cluster Collinder 236, supplemented by observations for stars near the Cepheid WZ Car. Collinder 236 is
Near-IR imaging of Galactic massive clusters : Westerlund 2
• Physics
• 2007
Context. Most stars in the Galaxy were formed in massive clusters. To understand nature's favorite mode of star formation and the initial stages of the life of most stars one needs to characterize
Two O2 If*/WN6 stars possibly ejected from the massive young Galactic cluster Westerlund 2
• Physics
• 2011
In this paper we report the identification of two new Galactic O2If*/WN6 stars (WR20aa and WR20c),ontheoutskirtsofthemassiveyoungstellarclusterWesterlund2.Themorphological similarity between the
The Open Cluster Ruprecht 91 and Its Cepheids
• Physics
• 2005
Photoelectric UBV photometry and star counts are presented for stars in the previously unstudied open cluster Ruprecht 91, supplemented by observations for stars in adjacent regions surrounding the
Alessi 95 and the short-period Cepheid SU Cassiopeiae
• Physics
• 2012
The parameters for the newly discovered open cluster Alessi 95 are established on the basis of available photometric and spectroscopic data, in conjunction with new observations. Colour excesses for
A SEARCH FOR OB ASSOCIATIONS NEAR SOUTHERN LONG-PERIOD CEPHEIDS. V. AQ PUPPIS AND V620 PUPPIS
• Physics
• 2012
A photometric UBV survey is presented for 610 stars in a region surrounding the Cepheid AQ Puppis and centered southwest of the variable, based upon photoelectric measures for 14 stars and calibrated