The SuperCOSMOS Sky Survey - I. Introduction and description

Hambly, N. C.; MacGillivray, H. T.; Read, Mike; Tritton, S. B.; Thomson, E.; Kelly, B. D.; Morgan, D. H.; Smith, R. E.; Driver, Simon P.; Williamson, J.; Parker, Quentin A.; Hawkins, M. R. S.; Williams, Philip; Lawrence, Andy

doi:10.1111/j.1365-2966.2001.04660.x

Cited by 551 publications

(557 citation statements)

References 38 publications

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“…About 1 million of the 2MASS galaxies are within its approximate completeness limit of Ks 13.9 mag (Vega). By cross-matching the 2MASS XSC sample with two other major all-sky photometric surveys (deeper than 2MASS), SuperCOSMOS scans of photographic plates (Hambly et al 2001) and mid-IR satellite data from WISE (Wright et al 2010), obtained multiwavelength information for the majority (95%) of 2MASS galaxies. This allowed further to derive photometric redshifts for these sources, by employing the empirical ANNz algorithm (Collister & Lahav 2004) trained on subsamples drawn from spectroscopic redshift surveys overlapping with 2MASS.…”

Section: The 2mass Photometric Redshift Cataloguementioning

confidence: 99%

Homogeneity and isotropy in the Two Micron All Sky Survey Photometric Redshift catalogue

Alonso

Salvador

Sánchez

et al. 2015

Monthly Notices of the Royal Astronomical Society

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Using the 2MASS Photometric Redshift catalogue we perform a number of statistical tests aimed at detecting possible departures from statistical homogeneity and isotropy in the large-scale structure of the Universe. Making use of the angular homogeneity index, an observable proposed in a previous publication, as well as studying the scaling of the angular clustering and number counts with magnitude limit, we place constraints on the fractal nature of the galaxy distribution. We find that the statistical properties of our sample are in excellent agreement with the standard cosmological model, and that it reaches the homogeneous regime significantly faster than a class of fractal models with dimensions D < 2.75. As part of our search for systematic effects, we also study the presence of hemispherical asymmetries in our data, finding no significant deviation beyond those allowed by the concordance model.

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Section: The 2mass Photometric Redshift Cataloguementioning

confidence: 99%

Homogeneity and isotropy in the Two Micron All Sky Survey Photometric Redshift catalogue

Alonso

Salvador

Sánchez

et al. 2015

Monthly Notices of the Royal Astronomical Society

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“…The 2MASS sources and the UCAC3 counterparts were superimposed on the images to assess the reliability of the cross-match. Besides, we used other available astro-photometric databases, namely the Astrographic Catalogue AC2000.2 (Urban et al 1998) and the SuperCOSMOS Sky Survey (Hambly et al 2001) to verify the peculiar proper motions, and the USNO-B Catalog (Monet et al 2003) and the PPMX and PPMXL catalogues (Röser et al 2008(Röser et al , 2010 for comparison. This procedure showed that the clearly discrepant proper motions were mostly caused by errors in the measurements, mainly from centroiding errors or source confusion.…”

Section: Kinematic Groups Towards Chamaeleonmentioning

confidence: 99%

Proper motions of young stars in Chamaeleon

Martí

Jiménez-Esteban

Bayo

et al. 2013

A&A

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Context. The study of the motion of the members of a given open cluster or stellar association provides key information about their formation and early evolution. The Chamaeleon cloud complex constitutes one of the closest and best studied low-mass star-forming regions in the Galaxy. Aims. We want to provide further evidence of the origin of the proposed stellar members of Chamaeleon and to identify interlopers from the foreground Cha and η Cha associations. Methods. We have compiled lists of spectroscopically confirmed members of Chamaeleon I and II, Cha and η Cha, and of background objects in the same line of sight. Using Virtual Observatory tools, we cross-match these lists with the UCAC3 catalogue to get the proper motions of the objects. In the vector point diagram, we identify the different moving groups, and use this information to study the membership of proposed candidate members of the associations from the literature. For those objects with available radial velocities, we compute their Galactic space velocities. We look for correlations between the known properties of the objects and their proper motions. Results. The members of the dark clouds exhibit clearly different proper motions from those of the foreground associations and of the background stars. The data suggest that Chamaeleon II could have different dynamical properties from Chamaeleon I. Although the two foreground clusters and η Chamaeleontis constitute two different proper motion groups, they have similar spatial motions, which are different from the spatial motion of Chamaeleon I. On the other hand, the space motions of the Chamaeleon II stars look more similar to those of the foreground clusters than to the Chamaeleon I stars, but the numbers are low. We find no correlations between the proper motions and the properties of the objects in either of the clouds. Conclusions. On the basis of proper motion, Chamaeleon I and II constitute two physical entities unrelated to the foreground and η Chamaeleontis clusters, but with the available data it is unclear to what extent the stellar populations in both clouds are physically connected to each other.

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“…Figure 2 shows a comparison between our determination of proper motion and that of some literature sources. We see how good agreement is reached in all cases with 2MASS and UKIDSS measurements although some dispersion is found with the SuperCosmos Sky Survey (Hambly et al 2001a(Hambly et al , 2001b(Hambly et al , 2001c and Position and Proper Motion Extended-L catalogue (PPMXL; Roeser et al 2010) measurements. The values we obtained for the SLoWPoKES II and WDS objects are in agreement with the correspondent catalogue results, except for 2MASS J13104398+1434338 / 2MASS J13104431+1434326 pair for which no proper motion is given in the WDS catalogue.…”

Section: Proper Motionsmentioning

confidence: 69%

Discovery of wide low and very low-mass binary systems using Virtual Observatory tools

Gálvez-Ortiz

Solano

Lodieu

et al. 2016

Mon. Not. R. Astron. Soc.

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The frequency of multiple systems and their properties are key constraints of stellar formation and evolution. Formation mechanisms of very low-mass (VLM) objects are still under considerable debate and an accurate assessment of their multiplicity and orbital properties are essential for constraining current theoretical models.Taking advantage of the Virtual Observatory capabilities, we looked for comoving low and VLM binary (or multiple) systems using the Large Area Survey of the UKIDSS LAS DR10, SDSS DR9, and the 2MASS Catalogues. Other catalogues (W ISE, GLIMPSE, SuperCosmos ...) were used to derive the physical parameters of the systems.We report the identification of 36 low and VLM (∼M0-L0 spectral types) candidates to binary/multiple system (separations between 200 and 92000 AU), whose physical association is confirmed through common proper motion, distance and low probability of chance alignment. This new system list notably increases the previous sampling in their mass-separation parameter space (∼100). We have also found 50 low-mass objects that we can classify as ∼L0-T2 according to their photometric information. Only one of these objects presents a common proper motion high-mass companion.Although we could not constrain the age of the majority of the candidates, probably most of them are still bound except four that may be under disruption processes. We suggest that our sample could be divided in two populations: one tightly bound wide VLM systems that are expected to last more than 10 Gyr, and other formed by weak bound wide VLM systems that will dissipate within a few Gyrs.

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The SuperCOSMOS Sky Survey - I. Introduction and description

Cited by 551 publications

References 38 publications

Homogeneity and isotropy in the Two Micron All Sky Survey Photometric Redshift catalogue

Homogeneity and isotropy in the Two Micron All Sky Survey Photometric Redshift catalogue

Proper motions of young stars in Chamaeleon

Discovery of wide low and very low-mass binary systems using Virtual Observatory tools

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