2014MNRAS.444.1931P


Query : 2014MNRAS.444.1931P

2014MNRAS.444.1931P - Mon. Not. R. Astron. Soc., 444, 1931-1939 (2014/October-3)

Discovery of a new Y dwarf: WISE J030449.03-270508.3.

PINFIELD D.J., GROMADZKI M., LEGGETT S.K., GOMES J., LODIEU N., KURTEV R., DAY-JONES A.C., RUIZ M.T., COOK N.J., MORLEY C.V., MARLEY M.S., MAROCCO F., SMART R.L., JONES H.R.A., LUCAS P.W., BELETSKY Y., IVANOV V.D., BURNINGHAM B., JENKINS J.S., CARDOSO C., FRITH J., CLARKE J.R.A., GALVEZ-ORTIZ M.C. and ZHANG Z.

Abstract (from CDS):

We present a new Y dwarf, WISE J030449.03-270508.3, confirmed from a candidate sample designed to pick out low-temperature objects from the Wide-field Infrared Survey Explorer (WISE) data base. The new object is typed Y0pec following a visual comparison with spectral standards, and lies at a likely distance of 10–17 pc. Its tangential velocity suggests thin disc membership, but it shows some spectral characteristics that suggest that it may be metal poor and/or older than previously identified Y0 dwarfs. Based on trends seen for warmer late-type T dwarfs, the Y-band flux peak morphology is indicative of sub-solar metallicity, and the enhanced red wing of the J-band flux peak offers evidence for high gravity and/or low metallicity (with associated model trends suggesting an age closer to ∼ 10 Gyr and mass in the range 0.02-0.03 M). This object may thus be extending the population parameter space of the known Y0 dwarfs.

Abstract Copyright: © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2014)

Journal keyword(s): surveys - brown dwarfs - stars: low-mass

CDS comments: The good reference for WISE J0647-6232 is Kirkpatrick et al. 2013. WISE J1405+5334 is a misprint for WISE J1405+5534.

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 WISE J001354.39+063448.1 BD* 00 13 54.391 +06 34 48.18           T8 9 0
2 WISE J030449.03-270508.3 BD* 03 04 49.03 -27 05 08.3           Y0pec 8 0
3 WISE J035000.32-565830.2 BD* 03 50 00.32784 -56 58 30.2340           Y1 28 0
4 HD 26015 PM* 04 07 41.9838821088 +15 09 46.041084720   6.45 6.07     F3V 164 0
5 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 165 0
6 HD 27975 PM* 04 24 07.4422770192 -20 07 06.765618792   8.93 8.46     F3V 13 0
7 WISE J064723.23-623235.5 BD* 06 47 23.23704 -62 32 35.5164           Y1 19 0
8 WISE J072227.27-054029.9 BD* 07 22 27.51096 -05 40 31.2096           T9 75 0
9 L 97-3 B BD* 08 07 14.675 -66 18 48.68           Y1 70 0
10 WISE J083337.82+005214.1 BD* 08 33 37.827 +00 52 14.20           T9 10 0
11 WISEA J085510.74-071442.5 BD* 08 55 10.83168 -07 14 42.5256           Y2 85 0
12 WISE J121756.90+162640.8 BD* 12 17 56.90808 +16 26 40.8372           T9+Y0 40 0
13 ULAS J131610.28+075553.0 BD* 13 16 10.28 +07 55 53.0           sdT6.5 10 0
14 WISE J140518.39+553421.3 BD* 14 05 18.39384 +55 34 21.3996           Y0(pec?) 51 0
15 HD 126053 PM* 14 23 15.2847745835 +01 14 29.641269692 6.98 6.90 6.27 5.71 5.39 G1.5V 405 0
16 NAME CFBDSIR 1458+1013B BD* 14 58 29.0 +10 13 43           T8+/Y? 24 1
17 CFBDS J145829+101343 ** 14 58 29.40072 +10 13 41.7108           T8+Y0 30 0
18 WISE J173835.53+273259.0 BD* 17 38 35.53440 +27 32 59.0964           Y0 54 0
19 WISE J182831.08+265037.7 BD* 18 28 31.08696 +26 50 37.7196           Y0 53 0
20 Wolf 1130 B BD* 20 05 20.38 +54 24 33.9           T8p 31 1
21 WISE J205628.91+145953.2 BD* 20 56 28.91952 +14 59 53.2248           Y0 41 0

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