2003A&A...410..269M

Query : 2003A&A...410..269M

2003A&A...410..269M - Astronomy and Astrophysics, volume 410, 269-282 (2003/10-4)

The short period multiplicity among T Tauri stars.

MELO C.H.F.

Abstract (from CDS):

We present the results of high-resolution spectroscopic observations carried out over three years aimed at estimating the short-period (P_orb<100days) binary frequency of a sample of T Tauri stars in Oph-Sco, Cha, Lup, CrA star forming regions (SFRs), already observed with high angular resolution techniques by Ghez et al. (1993AJ....106.2005G) and by Ghez et al. (1997ApJ...481..378G) to detect wider components. When combining all four SFRs, the short-period binary frequency is indistinguishable from that found by Duquennoy & Mayor (1991A&A...248..485D) for the solar-type field stars which is also consistent with the previous result obtained by Mathieu (1992, IAU Colloq., 135, 30 and 1994ARA&A..32..465M). When Oph-Sco is analyzed separately, it seems that there is an excess of short-period binaries of a factor 2-2.5. On the contrary, short-period binary systems seem to be absent in the sample containing stars in Cha/Lup/CrA. Such a trend was equally found by Mathieu (1992, IAU Colloq., 135, 30) in Taurus. An excess of spectroscopic systems among the components of visual multiple systems is also observed.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: close - stars: formation

CDS comments: Table 1 : NTTS 160815-1857 = NTTS 160814-1857.

Simbad objects: 99

Full paper

View the references in ADS

Number of rows : 99

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	V* SZ Cha	Or*	10 58 16.7500775160	-77 17 17.185749900			12.68		10.62	K0e	120	0
2	Hen 3-545	Or*	10 59 06.9715593000	-77 01 40.309233240		12.91	11.136		9.596	K4Ve	215	0
3	V* CS Cha	Or*	11 02 24.8763629208	-77 33 35.667131796		12.88	11.69		10.123	K2Ve	229	0
4	V* CT Cha	Or*	11 04 09.0989256840	-76 27 19.329779664		13.44	13.00		10.89	K7Ve	129	0
5	Ass Cha T 2-21	TT*	11 06 15.3471261840	-77 21 56.720362608		12.58	11.01		9.35	G5Ve	131	0
6	NAME Cha 1	MoC	11 06 48	-77 18.0						~	1141	1
7	V* DI Cha	Or*	11 07 20.7276076008	-77 38 07.308086352		12.02	10.74	10.72		G2Ve	168	0
8	Ass Cha T 1-15	Or*	11 07 43.6610412264	-77 39 41.134236408		17.05	15.34		12.67	K5Ve	77	0
9	Ass Cha T 1-16	Or*	11 07 57.9428053584	-77 38 44.977882344		15.1	14.2		13.04	K4-7	73	0
10	V* VW Cha	Or*	11 08 01.502064	-77 42 28.87524	13.91	14.165	12.761	12.653	10.69	K7+M0	185	0
11	HD 97048	Ae*	11 08 03.3109731720	-77 39 17.490777444	9.03	8.76	9.00		8.64	A0Vep	538	0
12	V* HP Cha	TT*	11 08 15.216432	-77 33 53.17020		14.33	12.77	12.11		K3+G5e	113	0
13	V* HP Cha A	*	11 08 15.4974157248	-77 33 53.446498956						K6e	85	0
14	NAME Cha IR Nebula	TT*	11 08 38.702	-77 43 51.54						M5.5	72	0
15	V* VZ Cha	Or*	11 09 23.7739008528	-76 23 20.857480836		13.82	12.94		12.14	K7e	139	0
16	HD 97300	Ae*	11 09 50.0199904704	-76 36 47.718191232		9.41	9.20		8.82	B9V	173	1
17	Ass Cha T 1-23	Or*	11 09 53.4189070920	-76 34 25.652641116		13.9	19.50	15.10	13.52	G9IIIe	95	0
18	V* WX Cha	Or*	11 09 58.666944	-77 37 09.03432		14.93	13.85	14.23	12.20	M1+M5	102	0
19	V* WW Cha	Or*	11 10 00.0802739160	-76 34 57.963853416		14.74	14.10		10.95	~	153	0
20	V* WY Cha	Or*	11 10 07.0339153464	-76 29 37.674167388		15.29	13.87		11.62	K8Ve	87	1
21	CHX 18N	TT*	11 11 46.3370290776	-76 20 08.948823324		13.27	11.96		10.37	K5IVe	79	1
22	Sz 41	TT*	11 12 24.3973943352	-76 37 06.181395384		11.2	11.60		10.22	K7+M2.5	101	1
23	V* CV Cha	Or*	11 12 27.7055693328	-76 44 22.302807396		12.02	10.98	10.51	9.76	G9Ve	194	1
24	Ass Cha T 2-54	TT*	11 12 42.6709132056	-77 22 22.943489160			11.103		9.653	G8+K7	91	2
25	NAME Cha II	MoC	12 54	-77.2						~	333	0
26	Hen 3-854	Or*	13 05 20.6574078672	-77 39 01.506188880		13.88	12.40			K5	45	0
27	V* BM Cha	Or*	13 08 06.2695235808	-77 55 05.329818156		16.77	14.60			K5	55	0
28	Sz 65	Or*	15 39 27.7716659160	-34 46 17.211087984		13.11	12.13	11.33	10.76	K7	99	0
29	Lupus 1	Cld	15 43 02.1	-34 09 06						~	283	0
30	CD-33 10685	Or*	15 45 12.8678037432	-34 17 30.644403036	12.47	11.56	10.224	9.60	8.685	K3Ve	270	1
31	V* GW Lup	Or*	15 46 44.7290527536	-34 30 35.677420056		13.8				M1.5e	137	0
32	V* HM Lup	Or*	15 47 50.6288371920	-35 28 35.404076028		15.941	14.748	14.337		M3e	82	0
33	THA 15-5	TT*	15 47 56.9427182064	-35 14 34.796420412		14.5	16.2			K7e	85	0
34	V* HN Lup	Or*	15 48 05.2154956876	-35 15 53.295162846		16.083	14.377	13.726		M3.5e	61	0
35	V* GQ Lup	Or*	15 49 12.1053805848	-35 39 05.058139788	12.19	12.76	11.66	11.15		K7Ve	288	1
36	Sz 77	TT*	15 51 46.9580885472	-35 56 44.112678504		12.0				K5.5	69	0
37	THA 15-8	TT*	15 53 41.1667402248	-39 00 37.115189856		11.6	11.5			~	13	0
38	THA 15-9	TT*	15 53 42.6872122728	-38 08 10.467552660		11.7	11.5			~	12	0
39	HD 142361	TT*	15 54 59.8695458688	-23 47 18.180029616		9.68	8.960		8.092	G3V	70	0
40	THA 15-12	Or*	15 56 09.2066646912	-37 56 06.126118692		13.12	11.93	11.45		M0e	407	0
41	V* RU Lup	TT*	15 56 42.3108692112	-37 49 15.473946900	9.27	10.07	9.60			K7/M0e	462	0
42	Lupus 2	MoC	15 57 08	-37 47.1						~	113	1
43	WRAY 15-1388	TT*	15 57 24.0102960624	-42 40 04.569017736		15.290	13.973	13.626		K7/M0	20	0
44	Sz 128	TT*	15 58 07.315776	-41 51 48.02400		16.544	15.093	14.517		M1	18	0
45	WRAY 15-1400	TT*	15 59 16.4717314824	-41 57 10.300018176		13.5	12.0			K7IVe	95	0
46	V* RY Lup	Or*	15 59 28.3864710696	-40 21 51.249496176		12.62	9.90			G8/K1IV-V	221	0
47	Sz 130	TT*	16 00 31.0374709944	-41 43 36.988516560		15.82	14.71	13.56	12.46	M1.5	62	0
48	CD-22 11298	BY*	16 01 25.6301810064	-22 40 40.289030832		13.02	13.44			K1IV	62	0
49	V* V1154 Sco	RS*	16 02 10.4340916128	-22 41 28.824128520		12.46	11.32	10.96		K5+K5	55	0
50	HD 325367	Or*	16 03 05.4915085848	-40 18 25.426727676		11.40	8.50			M0	340	0
51	Lupus 4	MoC	16 03 12.4	-42 07 43						~	151	0
52	HD 144007	TT*	16 05 15.2633667864	-40 19 10.356830220		10.64	9.14			K2(III)	20	0
53	V* HO Lup	Or*	16 07 00.603672	-39 02 19.49316		13.94	13.17	13.03		M1e	66	0
54	THA 15-19	LP?	16 07 04.9708254672	-39 28 33.285460224		13.4	14.2			M4	10	0
55	THA 15-21	TT*	16 07 10.0694468880	-39 11 03.260683896		15.28	13.70	13.70	12.49	K7-M0	72	0
56	THA 15-20	TT*	16 07 11.5873449384	-39 03 47.492129340		16.25	14.58	14.11	12.92	M0.5	106	0
57	Sz 96	TT*	16 08 12.6308620920	-39 08 33.470354256		14.80	13.43	13.69	11.84	~	79	0
58	V* V1279 Sco	Or*	16 08 22.4935277520	-39 04 46.427612052		14.99	13.66	11.70	11.21	M0.4	116	1
59	THA 15-29	Y*O	16 08 30.2687378568	-39 06 11.176056000		14.8	11.14	15.18	13.15	M4	64	0
60	V* V856 Sco	Ae*	16 08 34.2870044544	-39 06 18.325711332	7.66	7.41	7.05	6.92		A7IIIne_sh	386	0
61	THA 15-31	LP?	16 08 36.9025257864	-40 16 20.380514952		15.0	14			M4	21	0
62	V* V1193 Sco	Or*	16 08 51.5693655096	-39 03 17.707587264		15.27	14.58	13.72	12.28	M4.5	70	0
63	THA 15-33	TT*	16 08 54.6849382512	-39 37 43.145069664		15.34	13.98	13.29		M1IVe	92	0
64	Lupus 3	SFR	16 09.6	-39 03						~	320	0
65	THA 15-37	Y*O	16 09 44.3607357216	-39 13 30.167581764		15.84	14.59	14.20	12.38	M2	60	0
66	HD 144965	Be*	16 10 10.5557672592	-40 07 43.767402492	6.71	7.206	7.114			B3Vne	64	0
67	THA 15-42	Y*O	16 10 51.5849835192	-38 53 13.767885384		15.89	14.48	14.44	12.95	M1e	73	0
68	Wa Oph 1	Or*	16 11 08.9057560608	-19 04 46.976720052			12.073		10.194	K2IV(e)	66	0
69	ScoPMS 45	BY*	16 11 20.5774543272	-18 20 55.035502656			12.49			K5IV	32	0
70	V* V866 Sco	Or*	16 11 31.345632	-18 38 25.96200		13.98	12.63	12.81		K0e+K5e	279	0
71	Wa Oph 2	Or*	16 11 59.2702332696	-19 06 53.316517068			11.66	11.57		K2Ve	64	0
72	BD-18 4244	Or*	16 12 40.5144406080	-18 59 28.267620432		12.15	10.829		9.235	K0IV(e)	89	0
73	NAME Upper Sco-Cen	As*	16 15	-24.2						~	1310	1
74	Haro 1-4	Or*	16 25 10.508136	-23 19 14.78820				13.15		K4e	73	0
75	CD-24 12683	TT*	16 25 19.2498737256	-24 26 52.809731340		11.36	10.55		9.05	G9V	47	0
76	EM* SR 4	Or*	16 25 56.1659023848	-24 20 48.240627072			12.80	11.7	10.7	K0:Ve	182	1
77	Haro 1-6	Or*	16 26 03.0276684144	-24 23 36.188140848		14.15	14.01	12.38	10.80	K0	217	2
78	DoAr 24	TT*	16 26 17.0743951968	-24 20 21.594730920		16.06	14.21	14.02	11.57	K7.5V	110	1
79	GSS 31	TT*	16 26 23.3684537424	-24 20 59.579380248		15.9	14.70	14.33	11.53	K0e	142	1
80	EM* SR 24A	TT*	16 26 58.5134422944	-24 45 36.722580480				14.15	12.87	K1	104	0
81	CD-24 12689	Or*	16 27 40.2857881416	-24 22 04.130226300		12.91	11.533	11.11	10.00	K5e	282	0
82	EM* SR 20	Or*	16 28 32.6876536896	-24 22 45.008526648		16.23		12.59		G7	81	0
83	EM* SR 13	Or*	16 28 45.2768168328	-24 28 18.905579112			13.60	12.40	10.9	M2e	133	0
84	NAME Sco-Oph Cloud	?	16 30 00	-21 30.0						~	16	0
85	Haro 1-14	Or*	16 31 05.1623543808	-24 04 40.307366316				14.04		~	52	0
86	V* V2131 Oph	Or*	16 31 15.7445171496	-24 34 02.161097472		12.0	12.05	11.06	10.13	~	96	0
87	ROXs 43A	TT*	16 31 20.1191847456	-24 30 05.057116128		11.89	10.93			G5IVe	48	0
88	Haro 1-16	Or*	16 31 33.4634997336	-24 27 37.158728076		14.02	12.80			K3e	221	0
89	V* V1003 Oph	TT*	16 34 09.1696133088	-15 48 16.776092124			13.44			G5	98	0
90	EM* AS 209	TT*	16 49 15.3034917000	-14 22 08.643317664		12.62	11.28			K4Ve	376	0
91	2MASS J19000157-3637054	TT*	19 00 01.5743588376	-36 37 05.510254656		15.19	13.93			M1V	24	0
92	V* S CrA	Or*	19 01 08.597088	-36 57 19.89504		11.76	10.91	11.41		G0Ve+K0Ve	269	0
93	V* V709 CrA	Or*	19 01 34.8589591776	-37 00 56.579123412		12.70	11.03			K1IV	63	0
94	NAME Corona Australis Cloud	MoC	19 01 51	-36 58.9						~	483	0
95	V* R CrA	Ae*	19 01 53.6764322232	-36 57 08.299341828	12.781	12.651	11.917	11.242	10.412	B5IIIpe	476	1
96	V* T CrA	Ae*	19 01 58.7902764120	-36 57 50.339720880			11.67			F0	167	0
97	V* VV CrA	Or*	19 03 06.7410913704	-37 12 49.686912432		16.45	14.67	14.12	11.62	K7	119	0
98	NAME Upper Scorpius B	As*	~	~						~	12	0
99	NAME Upper Scorpius A	As*	~	~						~	16	0

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