New members in the upper scorpius association from the UKIRT infrared deep sky survey early data release

By Simon Dye, Stephen J. Warren, Nigel Hambly, N. Cross, S. Hodgkin, M. Irwin, Andy Lawrence, A. Adamson, O. Almaini, A. Edge and 35 more. 2006

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We present the results of a 9.3-deg 2 infrared (ZYJHK) survey in the Upper Scorpius association extracted from the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Cluster Survey Early Data Release. We have selected a total of 112 candidates from the (Z - J, Z) colour-magnitude diagram over the Z = 12.5-20.5 magnitude range, corresponding to M = 0.25-0.01 M ⊙ at an age of 5 Myr and a distance of 145 pc. Additional photometry in J and K filters revealed most of them as reddened stars, leaving 32 possible members. Among them, 15 have proper motion consistent with higher-mass members from Hipparcos and optical spectra with strong Ha in emission and weak gravity features. We have also extracted two lower-mass candidate members for which no optical spectra are in hand. Three members exhibit strong Ha equivalent widths (>20 A), suggesting that they could still undergo accretion, whereas two other dwarfs show signs of chromospheric activity. The likelihood of the binarity of a couple of new stellar and substellar members is discussed as well.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/b389125d2667c684711269a87da10edb03fcb35a

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Citations in the corpus

A Universal Stellar Initial Mass Function? A critical look at variations in extreme environments (2010, methodology): “Lodieu et al. (2006) identified candidate members using UKIDSS photometry (with subsequent spectroscopic confirmation for most candidates; Lodieu et al. 2007b) and measured an Γ = −0.4 ± 0.1 IMF from 0.01–0.3 M⊙.”
MID-INFRARED PHOTOMETRY OF COLD BROWN DWARFS: DIVERSITY IN AGE, MASS, AND METALLICITY (2010, background): “Technical information on the survey data reduction and quality control is given in Dye et al. (2006).”
The UKIRT Infrared Deep Sky Survey (UKIDSS) (2006, methodology): “This was therefore labelled an “Early Data Release (EDR)”.”
CANDELS MULTIWAVELENGTH CATALOGS: SOURCE IDENTIFICATION AND PHOTOMETRY IN THE CANDELS UKIDSS ULTRA-DEEP SURVEY FIELD (2013, background): “The crosstalk replica on the adjacent channel was shown to have intensity up to 1% of the flux of the original source that drops to about 0.05% beyond the third amplifier (e.g., Dye et al. 2006).”
The WFCAM Science Archive (2006, methodology): “Although the WSA design does not preclude fully automated QC procedures, presently the UKIDSS data (for example) have a lengthy semi–automated QC process applied, some details of which are given in Dye et al. (2006) and Warren et al. (2007a).”
Galaxy And Mass Assembly (GAMA): the input catalogue and star–galaxy separation (2009, methodology): “The imaging used in this work has already passed the basic quality assessments discussed in Dye et al. (2006) and Warren et al. (2007).”
WFCAM, Spitzer/IRAC and SCUBA observations of the massive star-forming region DR21/W75 - I. The collimated molecular jets (2006, methodology): “It was produced by patches of dirt on the WFCAM field lens (Dye et al. 2006). in the directions of the C 8-1:C 8-5 and C 9-1:C 9-2 jets respectively.”
THE SDSS-III BARYON OSCILLATION SPECTROSCOPIC SURVEY: QUASAR TARGET SELECTION FOR DATA RELEASE NINE (2011, unknown): “5.2 of Dye et al. 2006; Lawrence et al. 2007, Sec.”
The Subaru/XMM-Newton Deep Survey (SXDS). II. Optical Imaging and Photometric Catalogs (2008, methodology): “…with SCUBA (Coppin et al. 2006; Mortier et al., 2005), mid-infrared observations with Spitzer Space Telescope (Lonsdale et al. 2003), deep near-infrared imaging with the UKIRT/WFCAM (Foucaud et al. 2006; Dye et al. 2006; Lawrence et al. 2007), and the X-ray observations with XMM-Newton observatory.”