2011ApJ...731....8K

Query : 2011ApJ...731....8K

2011ApJ...731....8K - Astrophys. J., 731, 8 (2011/April-2)

Mapping the shores of the brown dwarf desert. II. Multiple star formation in Taurus-Auriga.

KRAUS A.L., IRELAND M.J., MARTINACHE F. and HILLENBRAND L.A.

Abstract (from CDS):

We have conducted a high-resolution imaging study of the Taurus-Auriga star-forming region in order to characterize the primordial outcome of multiple star formation and the extent of the brown dwarf desert. Our survey identified 16 new binary companions to primary stars with masses of 0.25-2.5 M☉, raising the total number of binary pairs (including components of high-order multiples) with separations of 3-5000 AU to 90. We find that ∼2/3-3/4 of all Taurus members are multiple systems of two or more stars, while the other ∼1/4-1/3 appear to have formed as single stars; the distribution of high-order multiplicity suggests that fragmentation into a wide binary has no impact on the subsequent probability that either component will fragment again. The separation distribution for solar-type stars (0.7-2.5 M☉) is nearly log-flat over separations of 3-5000 AU, but lower-mass stars (0.25-0.7 M ☉) show a paucity of binary companions with separations of ≳200 AU. Across this full mass range, companion masses are well described with a linear-flat function; all system mass ratios (q = MB/MA) are equally probable, apparently including substellar companions. Our results are broadly consistent with the two expected modes of binary formation (free-fall fragmentation on large scales and disk fragmentation on small scales), but the distributions provide some clues as to the epochs at which the companions are likely to form.

Abstract Copyright: ∼

Journal keyword(s): binaries: general - brown dwarfs - stars: low-mass - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/ApJ/731/8): table1.dat table2.dat table4.dat table5.dat table6.dat refs.dat>

Simbad objects: 143

goto Full paper

goto View the references in ADS

Number of rows : 143
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * alf Per V* 03 24 19.3700924 +49 51 40.245455 2.64 2.27 1.79     F5Ib 870 1
2 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
3 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
4 2MASS J03542950+3203013 TT* 03 54 29.5045395048 +32 03 01.408753080   12.71 11.85     G0 55 0
5 2MASS J03543017+3203043 TT* 03 54 30.1717556400 +32 03 04.330870164   13.25 12.31     G5 55 0
6 2MASS J04080782+2807280 TT* 04 08 07.8349839792 +28 07 28.182115740           ~ 21 0
7 V* V1095 Tau TT* 04 13 14.1551534304 +28 19 10.668859500   15.32 13.81 13.62   M4 123 0
8 V* V1096 Tau TT* 04 13 27.2218223808 +28 16 24.656012868   15.42 13.53 13.07   M0 93 0
9 HD 283447 Or* 04 14 12.9261150912 +28 12 12.359055168 13.17 12.07 10.68 9.45 8.67 K3Ve 445 0
10 V* FM Tau Or* 04 14 13.5841955640 +28 12 49.168982592 14.44   13.80 13.64   M0/2e 227 0
11 V* FN Tau TT* 04 14 14.5945463760 +28 27 58.067731188     14.70 13.68   M5e 178 0
12 V* CW Tau TT* 04 14 17.0042670144 +28 10 57.766508508 13.92 13.64 12.36 12.86   K0Ve 381 0
13 [BHS98] MHO 2 TT* 04 14 26.4009435600 +28 05 59.635905324           M2.5 64 1
14 NAME IRAS 04114+2757G TT* 04 14 30.5508810936 +28 05 14.596567332           M2.2 61 0
15 V* FP Tau Or* 04 14 47.3033083488 +26 46 26.414391720 17.21 16.14 15.02     M4Ve 189 0
16 2MASS J04144741+2812219 * 04 14 47.4146784960 +28 12 21.909504132       18.9   ~ 6 0
17 V* CX Tau Or* 04 14 47.8615248984 +26 48 11.014877916 16.48 15.93 14.50     M1.5Ve 217 0
18 V* FO Tau Or* 04 14 49.2843205392 +28 12 30.505096476       14.92   M3.5e+M3.5e 139 0
19 EM* LkCa 4 Or* 04 16 28.1067298272 +28 07 35.731363080   13.96 12.78 11.825   K7:Ve 208 0
20 V* CY Tau Or* 04 17 33.7284990744 +28 20 46.812121656 14.52 14.68 13.40 12.59   M1.5 297 0
21 V* V1312 Tau TT* 04 17 38.9450182296 +28 33 00.578450700   15.57 13.26 13.12   M2 113 0
22 IRAS F04147+2822 TT* 04 17 49.6577031384 +28 29 36.318234912           M3.7 89 0
23 V* V410 Tau Or* 04 18 31.1081296680 +28 27 16.155955728   12.13 10.75 8.45 9.408 K3Ve 483 0
24 V* V1023 Tau Or* 04 18 47.0291197872 +28 20 07.493080560   14.31 12.00 11.21   K7 178 0
25 V* V1069 Tau Or* 04 18 51.7036254480 +17 23 16.582694856   13.32 12.22 12.22 10.944 K7e 143 0
26 V* BP Tau Or* 04 19 15.8339827632 +29 06 26.926959492   13.13 12.12 11.89   K5/7Ve 721 0
27 WK81 1 TT* 04 19 26.2675117776 +28 26 14.259575472   14.81 13.04 12.240   K7 249 1
28 IRAS 04187+1927 TT* 04 21 43.2345350808 +19 34 13.311438132       15.41   M2.4 66 0
29 V* DE Tau Or* 04 21 55.6347850824 +27 55 06.184016436 15.18 15.13 13.80     M3Ve 286 0
30 V* RY Tau TT* 04 21 57.4092550080 +28 26 35.555316612 10.82 10.34 9.30 9.67 8.87 K1IV/Ve 744 1
31 HD 283572 Or* 04 21 58.8484815456 +28 18 06.512641416   9.80 9.03 9.14   G5IVe 308 0
32 V* T Tau TT* 04 21 59.4319873992 +19 32 06.432393336   11.22 10.12 9.80   K0IV/Ve 1456 1
33 V* FS Tau Or* 04 22 02.1798627024 +26 57 30.575293308 17.57   14.10 15.63   M3.5e+M0e 289 0
34 EM* LkCa 21 Or* 04 22 03.1470550272 +28 25 39.096067656   10.94       M3/4Ve 101 0
35 V* FT Tau Or* 04 23 39.1888788312 +24 56 14.250818940   16.15 14.93 14.70   M2.8 169 0
36 V* IP Tau Or* 04 24 57.0824018640 +27 11 56.539953888   14.50   12.46   M0:Ve 265 0
37 [HJS91] 4872 Or* 04 25 17.6698859307 +26 17 50.429311147   15.66 13.77 13.67   K9e 55 0
38 V* FV Tau Or* 04 26 53.5368775848 +26 06 54.276020136 19.58     15.26   K5 142 2
39 V* DF Tau TT* 04 27 02.7932020080 +25 42 22.453341516 11.97 12.25 11.42 10.31 9.14 M3Ve 528 1
40 V* DG Tau TT* 04 27 04.6921275888 +26 06 16.060169268 13.57 13.97 10.50 12.28   K6Ve 1092 1
41 HD 285778 Or* 04 27 10.5694045464 +17 50 42.660831084   11.07 10.22     K1e 143 0
42 LDN 1521D DNe 04 27 46.5 +26 18 52           ~ 215 0
43 [HJS91] 507 TT* 04 29 20.7035640048 +26 33 40.446122616 17.35   14.58     M4 53 0
44 V* FW Tau TT* 04 29 29.703744 +26 16 53.06412       15.85   M5.5 143 0
45 V* DH Tau Or* 04 29 41.5525353432 +26 32 58.126559604 15.14 14.62 13.10 13.01   M1Ve 323 0
46 V* DH Tau B LM* 04 29 41.66 +26 32 56.5           M9.25 105 1
47 V* DI Tau Or* 04 29 42.4723379736 +26 32 49.128692676 16.39 15.20 13.60     M0Ve 223 0
48 V* IQ Tau Or* 04 29 51.5569574040 +26 06 44.859710736 15.43   13.80 12.28 11.11 M0.5 281 0
49 NAME Tau-Aur Complex SFR 04 30 +25.0           ~ 1453 0
50 V* UX Tau C TT* 04 30 03.9883041960 +18 13 46.785195012     18.0     M5 52 0
51 V* UX Tau A TT* 04 30 03.9932216088 +18 13 49.469925504   12.92 11.15     K2Ve 386 0
52 V* UX Tau Or* 04 30 03.99626 +18 13 49.4355 11.23 11.84 10.80 9.83 9.05 K2Ve+M1Ve 380 0
53 V* DK Tau A Or* 04 30 44.2408811328 +26 01 24.734232948           K5Ve 271 0
54 V* DK Tau Or* 04 30 44.243376 +26 01 24.65328 13.32 14.59 13.05 12.08   K7e+K7e 350 0
55 V* DK Tau B Or* 04 30 44.3938465800 +26 01 23.599254720           K7e 37 0
56 V* V1320 Tau TT* 04 31 14.4389827248 +27 10 17.920846416   14.33 12.689 11.75 10.844 M1 71 0
57 V* V1213 Tau Or* 04 31 37.5055489536 +18 12 24.383952396           K7 605 0
58 V* HL Tau Or* 04 31 38.5107609312 +18 13 57.859747968   15.89 14.49 14.39   K5 1546 0
59 IRAS 04287+1807 mul 04 31 38.8 +18 13 57           ~ 797 0
60 V* XZ Tau Or* 04 31 40.0868968022 +18 13 56.642439056     10.40 13.12   M2e+M2e 466 2
61 V* HK Tau TT* 04 31 50.5715875272 +24 24 17.775307548 16.81 16.689 15.292     M0.5 358 1
62 V* HK Tau B TT* 04 31 50.6002481212 +24 24 15.502558869           ~ 95 0
63 V* V710 Tau B TT* 04 31 57.7918661040 +18 21 37.947126420   15.07 13.55 13.98   M0.5/1e 76 0
64 V* V710 Tau Or* 04 31 57.79839 +18 21 36.9408           M4 167 0
65 V* V710 Tau A TT* 04 31 57.8028713880 +18 21 34.732161936       13.87   M2/3e 177 0
66 2MASS J04315844+2543299 TT* 04 31 58.4512497480 +25 43 30.014107608     15.96     M4.9 52 0
67 L 1551-51 Or* 04 32 09.2839413744 +17 57 22.693472640   13.29       K7e 147 0
68 V* V827 Tau TT* 04 32 14.5700738928 +18 20 14.771601168   14.00 12.63 12.35   K7Ve 179 0
69 Haro 6-13 Or* 04 32 15.4174258632 +24 28 59.577717108 19.22   17.7     M0 233 1
70 V* V826 Tau TT* 04 32 15.8393134800 +18 01 38.750623752   13.51 12.074   10.312 K7.0 187 0
71 V* V928 Tau Or* 04 32 18.8875357800 +24 22 26.686742088 17.65 15.978 14.101 13.704   M0.5 105 0
72 V* GG Tau Or* 04 32 30.3506925552 +17 31 40.494063144 14.84 14.78 13.40 11.54   M0e+M2.0e 793 1
73 V* FY Tau Or* 04 32 30.5784243120 +24 19 57.359889192 17.83 18.05 13.49 14.17   M0.1 132 0
74 V* FZ Tau Or* 04 32 31.7627107344 +24 20 03.056011548 16.15     15.04   M0 176 0
75 V* UZ Tau B TT* 04 32 42.8118779016 +25 52 31.198173600   14.07 12.72 13.35   M1/3Ve 158 0
76 V* UZ Tau Or* 04 32 43.02172 +25 52 30.9038           M4Ve+M1/3Ve 323 0
77 V* V1076 Tau Or* 04 32 43.7362452744 +18 02 56.310071784   14.72       K7 110 0
78 JH 112 TT* 04 32 49.1168400816 +22 53 02.847144336 18.81     14.982   K5.5 84 0
79 V* GH Tau Or* 04 33 06.2186830512 +24 09 33.584489856     13.20 12.59   M3Ve 197 0
80 V* V807 Tau Or* 04 33 06.6358574736 +24 09 54.977968116   12.10 11.21 11.18   K7 168 2
81 V* V830 Tau TT* 04 33 10.0300557048 +24 33 43.255480860   13.91 12.08 11.30   M0-1 238 1
82 V* GI Tau Or* 04 33 34.0609697160 +24 21 17.068989852 14.34   13.70 12.15 11.06 K5Ve 307 1
83 V* GK Tau Or* 04 33 34.5630097872 +24 21 05.855136732 15.50   13.00 12.02 10.62 K7:Ve 338 0
84 V* DL Tau Or* 04 33 39.0767679288 +25 20 38.101382952 14.04 14.59 13.40 11.85 10.89 K7Ve 372 0
85 V* HN Tau B TT* 04 33 39.2226918336 +17 51 49.874296644     18.1     M4e 36 0
86 V* HN Tau Or* 04 33 39.3629421552 +17 51 52.289234280   14.76 13.40 13.05   K5e 271 0
87 V* DM Tau Or* 04 33 48.7336763736 +18 10 09.973460280 14.30 14.82 14.00     M2Ve 731 0
88 V* CI Tau Or* 04 33 52.0143963264 +22 50 30.094090908 14.97 15.09 13.80     K4IVe 422 1
89 V* IT Tau B Or* 04 33 54.5852814192 +26 13 25.780453824           M4 24 0
90 V* IT Tau TT* 04 33 54.70128 +26 13 27.5232   16.76 14.63     K6.0 105 0
91 V* IT Tau A Or* 04 33 54.7115553456 +26 13 27.489035208 18.01         K3 23 0
92 UCAC4 544-009632 TT* 04 33 55.477344 +18 38 39.02712   16.42 14.85 14.61   M3.7 33 0
93 ZTF J043411.00+225144.1 TT* 04 34 10.9942079544 +22 51 44.395888824     15.19     M1.5 70 0
94 V* V1077 Tau Or* 04 34 18.0303957624 +18 30 06.519662280   13.70       G8 93 0
95 V* AA Tau Or* 04 34 55.4201902392 +24 28 53.033624580 13.14 13.34 12.20 12.03   K5Ve 801 0
96 V* HO Tau Or* 04 35 20.2104968376 +22 32 14.561379276     15.20     M0.5 144 0
97 V* FF Tau Or* 04 35 20.9046544728 +22 54 24.233506092 17.57 15.73       K7 91 1
98 GSC 01270-00355 TT* 04 35 24.5038529437 +17 51 42.495480359   15.680 14.030 13.310   M1.5 62 2
99 V* DN Tau Or* 04 35 27.3776226144 +24 14 58.910343720 13.56 12.88 11.50 11.79   M1:Ve 448 0
100 CoKu Tau-Aur Star 3 TT* 04 35 40.937952 +24 11 08.49012 20.58         M4.3 113 0
101 V* HP Tau Or* 04 35 52.7819078592 +22 54 23.156947512 17.39 14.9 14.90     K2-5e 243 1
102 CoKu HP Tau G3 Or* 04 35 53.4988337112 +22 54 09.005027328 18.21   14.8     M0.6 79 0
103 CoKu HP Tau G2 Or* 04 35 54.1535049648 +22 54 13.426506072 13.63 12.31 11.158 10.14 9.172 G2e 138 0
104 Haro 6-28 Or* 04 35 56.8536876816 +22 54 36.092202012 18.94         M3.1 110 0
105 V* V1115 Tau TT* 04 36 19.1015447256 +25 42 59.001786828   12.97 11.76 10.81 10.228 M0 109 0
106 V* DO Tau Or* 04 38 28.5880527336 +26 10 49.467596196 12.78 13.44 12.30 13.01   M1Ve 413 1
107 V* HV Tau LM* 04 38 35.2904827968 +26 10 38.640143136           M1Ve 160 0
108 V* HV Tau C TT* 04 38 35.5125950280 +26 10 41.316576204         14.90 K6 110 0
109 2MASS J04390163+2336029 TT* 04 39 01.6340692944 +23 36 02.955254004   16.7   15.2 12.8 M6 63 0
110 EM* LkCa 15 Or* 04 39 17.7911622816 +22 21 03.390090984   13.01 12.03 11.61   K5:Ve 792 1
111 JH 223 TT* 04 40 49.5109778880 +25 51 18.968555196 18.25     15.09   M2.8 71 0
112 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
113 CoKu Tau-Aur Star 4 TT* 04 41 16.8104181312 +28 40 00.073831728   16.40 14.68 14.59   M1.5e 187 0
114 ATO J070.4402+23.0326 TT* 04 41 45.6498314952 +23 01 58.025260668   16.67 15.20 14.87   M4.3 44 1
115 EM* LkHA 332 Or* 04 42 07.7851647456 +25 23 11.886259920 17.90 16.51       K7+M2.5 164 1
116 V* DP Tau Or* 04 42 37.6989071232 +25 15 36.983641716 15.84 15.2 13.70 14.42   M0.8 179 1
117 V* GO Tau Or* 04 43 03.0761840904 +25 20 18.706850340   16.2 14.40     M2.3 229 0
118 2MASS J04464260+2459034 TT* 04 46 42.6206542944 +24 59 03.309246888           M5.5 32 0
119 V* DQ Tau Or* 04 46 53.0575226016 +17 00 00.136127304 14.56 13.67 12.00 13.21   M1Ve 373 0
120 Haro 6-37 Or* 04 46 58.97952 +17 02 38.1948           K7e+M1e 125 0
121 V* DR Tau Or* 04 47 06.2151561264 +16 58 42.813872580 12.03 11.86 10.50 12.19   K5Ve 585 0
122 V* DS Tau Or* 04 47 48.5954691000 +29 25 11.191621512 13.11 13.16 12.30 12.37 10.80 K4Ve 281 0
123 V* UY Aur Or* 04 51 47.3890167432 +30 47 13.551561492 12.82 12.96 11.90 10.59 9.52 M0e+M2.5e 379 0
124 2MASS J04542368+1709534 TT* 04 54 23.6741496384 +17 09 53.495824464     13.5     M3.4 62 1
125 V* GM Aur Or* 04 55 10.9815576936 +30 21 59.373771876 14.59 13.351 12.242 11.798   K3Ve 797 0
126 HD 282630 Or* 04 55 36.9695564640 +30 17 55.101300900   12.17 11.12 10.55   K0Ve 185 0
127 V* AB Aur Ae* 04 55 45.8458932216 +30 33 04.292077032 7.20 7.16 7.05 6.96 6.70 A0Ve 1176 2
128 2MASS J04554757+3028077 TT* 04 55 47.5769732976 +30 28 07.551867252           M5e 44 0
129 V* SU Aur Or* 04 55 59.3866872552 +30 34 01.499608092   10.33 9.30 9.17   G2IIIne 628 0
130 V* V397 Aur Or* 04 56 02.0265224208 +30 21 03.670989228   13.07 11.72 11.25   K7e 183 0
131 V* V836 Tau TT* 05 03 06.5988375912 +25 23 19.606639488   15.00 13.49 13.48   K7/M0Ve 249 0
132 2MASS J05044139+2509544 TT* 05 04 41.3972186256 +25 09 54.583156908           M3.7 50 0
133 IRAS 05022+2527 TT* 05 05 22.8194200200 +25 31 30.819373752   17.71 16.26     M4.6 77 0
134 2MASS J05061674+2446102 TT* 05 06 16.7528811648 +24 46 10.156763820           M3/5e 35 0
135 2MASS J05062332+2432199 TT* 05 06 23.3356482336 +24 32 19.917141360           M3/5e 45 0
136 ATO J076.8002+24.6211 TT* 05 07 12.0680599608 +24 37 16.368921336           K6 32 0
137 V* RW Aur TT* 05 07 49.5662483 +30 24 05.177426   10.86 9.60 9.95   K1/5e+K5e 816 0
138 2MASS J05075496+2500156 TT* 05 07 54.9662127984 +25 00 15.595190532           M3.7 55 0
139 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
140 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
141 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
142 NAME the Pipe Nebula DNe 17 30 -25.0           ~ 442 1
143 Wolf 1084 SB* 20 43 19.2623811502 +55 20 53.100443210   16.46   13.9   M5Ve 94 0

To bookmark this query, right click on this link: simbad:objects in 2011ApJ...731....8K and select 'bookmark this link' or equivalent in the popup menu