2013MNRAS.434.1117D


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.28CET10:40:38

2013MNRAS.434.1117D - Mon. Not. R. Astron. Soc., 434, 1117-1128 (2013/September-2)

A young hierarchical triple system harbouring a candidate debris disc.

DEACON N.R., SCHLIEDER J.E., OLOFSSON J., JOHNSTON K.G. and HENNING Th.

Abstract (from CDS):

We report the detection of a wide young hierarchical triple system where the primary has a candidate debris disc. The primary, TYC 5241-986-1 A, is a known Tycho star which we classify as a late-K star with emission in the X-ray, near- and far-ultraviolet (UV) and Hα suggestive of youth. Its proper motion, photometric distance (65-105 pc) and radial velocity lead us to associate the system with the broadly defined Local Association of young stars but not specifically with any young moving group. The presence of weak lithium absorption and X-ray and calcium H and K emission support an age in the 20 to ∼ 125 Myr range. The secondary is a pair of M4.5±0.5 dwarfs with near- and far-UV and Hα emission separated by approximately 1 arcsec ( ∼ 65-105 au projected separation) which lie of 145 arcsec (9200-15200 au) from the primary. The primary has a Wide-field Infrared Survey Explorer (WISE) 22 µm excess and follow-up Herschel observations also detect an excess at 70 µm. The excess emissions are indicative of a 100-175 K debris disc. We also explore the possibility that this excess could be due to a coincident background galaxy and conclude that this is unlikely. Debris discs are extremely rare around stars older than 15 Myr, hence if the excess is caused by a disc this is an extremely novel system.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): surveys - binaries: visual - circumstellar material - stars: late-type - stars: pre-main-sequence

Simbad objects: 32

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Number of rows : 32

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME THA As* 00 00 -62.0           ~ 324 0
2 NAME Horologium Association As* 02 10.0 -54 30           ~ 49 0
3 NAME NGC 869/884 OpC 02 20.5 +57 08           ~ 49 0
4 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2928 0
5 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2607 0
6 V* V1005 Ori BY* 04 59 34.8341800543 +01 47 00.672080375   11.48 10.107 9.603 8.239 M0Ve 297 0
7 NAME Columba Association As* 06 14.0 -40 03           ~ 188 0
8 NGC 2547 OpC 08 09 52.360 -49 10 35.01           ~ 303 0
9 HD 88230 Fl* 10 11 22.1400209197 +49 27 15.249158750 9.23 7.94 6.61 5.36 4.56 K6VeFe-1 419 0
10 V* CE Ant TT* 10 42 30.1021269333 -33 40 16.226774953   12.21 10.91   9.10 M2Ve 147 1
11 NAME TW Hya Association As* 11 01.9 -34 42           ~ 801 0
12 V* DS Leo BY* 11 02 38.3419263291 +21 58 01.704479733 12.246 11.049 9.572 8.638 7.634 M1.0V 164 0
13 TWA 3 ** 11 10 27.894072 -37 31 51.96612   13.53 12.05 11.61 9.29 M4Ve+M4Ve 200 0
14 CD-34 7390A TT* 11 21 17.2193442623 -34 46 45.500772910   12.88 11.46 11.43 9.57 M1Ve 82 0
15 HD 98800 RS* 11 22 05.28975 -24 46 39.7571   10.27 8.912 9.257 7.386 K5V(e) 326 0
16 BD+21 2486 ** 13 06 15.39818 +20 43 45.2749 11.909 10.715 9.398 8.575 7.823 K4V 60 0
17 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 534 0
18 BD-07 4003 BY* 15 19 26.8271336166 -07 43 20.190958776 13.403 11.76 10.560 9.461 8.911 M3V 525 2
19 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11184 0
20 UCAC3 116-474938 ** 19 56 02.9362903468 -32 07 18.772301422   14.79 13.23 12.98   M4 34 0
21 HD 191089 PM* 20 09 05.2158287736 -26 13 26.520539765   7.62 7.18     F5V 111 0
22 V* AT Mic ** 20 41 51.15925 -32 26 06.8283 12.753 11.909 10.343 9.098 7.383 M4.5Ve+M4.5Ve 323 0
23 V* AU Mic BY* 20 45 09.5323695486 -31 20 27.241710746   10.05 8.627 9.078 6.593 M1VeBa1 881 0
24 G 263-10 PM* 21 58 24.5154485777 +75 35 20.606796372       10.163   M1V 62 0
25 BD+25 4655 HS* 21 59 41.9751489837 +26 25 57.398356446 8.27 9.39 9.68     sdO6 97 0
26 SDSS J225934.58-070231.5 G 22 59 34.584 -07 02 31.53           ~ 1 0
27 UCAC3 166-320670 ** 22 59 34.860 -07 04 46.84       15.09 12.58 M4-5 2 0
28 TYC 5241-986-1 PM* 22 59 34.9990001397 -07 02 22.864507452   12.78 11.59 11.56 10.36 K5-6 1 0
29 ** DEA 2 ** 22 59 35.0 -07 02 23           ~ 1 0
30 NAME AB Dor Moving Group MGr ~ ~           ~ 340 0
31 NAME Pleiades Moving Group MGr ~ ~           ~ 231 1
32 NAME Carina Association As* ~ ~           ~ 94 1

    Equat.    Gal    SGal    Ecl

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2020.01.28-10:40:38

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