2014A&A...572A..62A

Query : 2014A&A...572A..62A

2014A&A...572A..62A - Astronomy and Astrophysics, volume 572A, 62-62 (2014/12-1)

POISSON project. III. Investigating the evolution of the mass accretion rate.

ANTONIUCCI S., GARCIA LOPEZ R., NISINI B., CARATTI O GARATTI A., GIANNINI T. and LORENZETTI D.

Abstract (from CDS):

As part of the Protostellar Optical-Infrared Spectral Survey On NTT (POISSON) project, we present the results of the analysis of low-resolution near-IR spectroscopic data (0.9-2.4µm) of two samples of young stellar objects in the Lupus (52 objects) and Serpens (17 objects) star-forming clouds, with masses in the range of 0.1 to 2.0M☉ and ages spanning from 105 to a few 107yr. After determining the accretion parameters of the targets by analysing their HI near-IR emission features, we added the results from the Lupus and Serpens clouds to those from previous regions (investigated in POISSON with the same methodology) to obtain a final catalogue (143 objects) of mass accretion rate values ({dot}(M)acc) derived in a homogeneous and consistent fashion. Our final goal is to analyse how {dot}(M)acc correlates with the stellar mass (M*) and how it evolves in time in the whole POISSON sample. We derived the accretion luminosity (Lacc) and {dot}(M)acc for Lupus and Serpens objects from the Brγ (Paβ in a few cases) line by using relevant empirical relationships available in the literature that connect the HI line luminosity and Lacc. To minimise the biases that arise from adopting literature data that are based on different evolutionary models and also for self-consistency, we re-derived mass and age for each source of the POISSON samples using the same set of evolutionary tracks. We observe a correlation {dot}(M)acc∼M*2.2 between mass accretion rate and stellar mass, similarly to what has previously been observed in several star-forming regions. We find that the time variation of {dot}(M)acc is roughly consistent with the expected evolution of the accretion rate in viscous disks, with an asymptotic decay that behaves as t–1.6. However, {dot}(M)acc values are characterised by a large scatter at similar ages and are on average higher than the predictions of viscous models. Although part of the scattering may be related to systematics due to the employed empirical relationship and to uncertainties on the single measurements, the general distribution and decay trend of the {dot}(M)acc points are real. These findings might be indicative of a large variation in the initial mass of the disks, of fairly different viscous laws among disks, of varying accretion regimes, and of other mechanisms that add to the dissipation of the disks, such as photo-evaporation.

Abstract Copyright: ∼

Journal keyword(s): stars: formation - stars: pre-main sequence - stars: evolution - infrared: stars - accretion, accretion disks

Simbad objects: 158

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Number of rows : 158
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 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4416 0
2 2E 0458.5-6907 X 04 58 18.01 -69 04 19.7           ~ 4 0
3 V* V823 Ori Or* 05 36 06.6545407896 -06 32 17.138604120     16.921   14.217 K5 27 0
4 IRAS 05339-0646 Y*O 05 36 25.1310460128 -06 44 41.842301532     18.160   14.634 K4.5 67 0
5 BD-06 1253 Ae* 05 36 25.4320468080 -06 42 57.684730284   11.65 10.9 10.29   A1e 435 1
6 V* V846 Ori Or* 05 36 41.3690944584 -06 34 00.750817740   16.370 15.166 14.626 12.462 M0 47 0
7 IRAS 05350-0700 Y*O 05 37 24.4745679576 -06 58 32.754301068           K5 29 0
8 2MASS J05380752-0708291 Y*O 05 38 07.525 -07 08 29.20           K7 45 0
9 Parenago 2649 Ae* 05 38 09.3040171896 -06 49 16.595034888   15.361 13.860 13.438   A5e 68 0
10 V* V883 Ori Or* 05 38 18.1018261392 -07 02 26.017707120           F:I: 212 0
11 IC 430 RNe 05 38 18.24 -07 02 26.2           ~ 64 0
12 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 567 0
13 Haro 4-254 Y*O 05 38 52.3773529608 -07 21 09.296181180   16.5 15.712   12.743 G4.3 39 0
14 LDN 1641 MoC 05 39.0 -07 00           ~ 479 0
15 [MB91] 31 Y*O 05 39 05.3719464000 -07 11 05.160064668     19.862   15.708 M0.2 32 0
16 Haro 4-255 Y*O 05 39 22.3402033872 -07 26 44.480192532   15 15.830   12.969 K0 102 0
17 IRAS 05378-0750 * 05 40 16.7 -07 48 33           K7 21 0
18 2MASS J05401780-0748258 Y*O 05 40 17.805 -07 48 25.84           ~ 12 0
19 IRAS 05379-0815 * 05 40 19.8 -08 14 08           K7 13 0
20 V* V1791 Ori Or* 05 40 37.3589032680 -08 04 03.013089456     11.55   11.822 F 37 0
21 IRAS 05389-0759 Y*O 05 41 22.131 -07 58 03.04           K5 19 0
22 V* DL Ori Or* 05 41 25.3543024416 -08 05 54.724289712   13.97 12.95 12.57   K1 62 0
23 2MASS J05413005-0840092 Y*O 05 41 30.052 -08 40 09.21           M0 12 0
24 IRAS 05391-0841 IR 05 41 30.297 -08 40 16.57           ~ 9 0
25 [CG2010] IRAS 05391-0841(S) Y*O 05 41 30.34 -08 40 27.7           ~ 2 0
26 IRAS 05391-0805 * 05 41 30.5 -08 03 38           K5 11 0
27 IRAS 05391-0836 * 05 41 34.9 -08 35 25           M0 10 0
28 2MASS J05424706-0817069 Y*O 05 42 47.067 -08 17 06.93           M5 54 0
29 V* V2775 Ori Or* 05 42 48.48792 -08 16 34.7448           ~ 68 0
30 IRAS 05404-0841 * 05 42 51.5 -08 40 01           K6 7 0
31 V* CS Cha Or* 11 02 24.8763629208 -77 33 35.667131796   12.88 11.69   10.123 K2Ve 230 0
32 V* CT Cha Or* 11 04 09.0989256840 -76 27 19.329779664   13.44 13.00   10.89 K7Ve 130 0
33 BYB 18 Y*O 11 04 42.5993270304 -77 41 57.167040408         13.63 M4.5e 58 0
34 Hn 5 Or* 11 06 41.7902217936 -76 35 49.067303964         13.61 M4.5e 53 0
35 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1154 1
36 IRAS 11057-7706 Y*O 11 07 09.19896 -77 23 04.9920           ~ 63 0
37 V* GZ Cha Or* 11 07 16.22784 -77 23 06.8316           M1 30 0
38 V* DI Cha Or* 11 07 20.7276076008 -77 38 07.308086352   12.02 10.74 10.72   G2Ve 168 0
39 [CCE98] 2-24 Y*O 11 07 21.426 -77 22 11.76           M2 35 0
40 V* HM Cha Or* 11 07 57.2800691640 -77 17 26.241455868       20.9 17.14 M0.75-M1.75 39 0
41 Sz 23 Or* 11 07 58.0951794888 -77 42 41.352365124   15.8 18.04   14.63 M4Ve 69 0
42 CHXR 30A Y*O 11 07 59.9497969992 -77 17 30.576549264   21.8   18.3 15.78 K8 34 0
43 V* VW Cha Or* 11 08 01.502064 -77 42 28.87524 13.91 14.165 12.761 12.653 10.69 K7+M0 187 0
44 HJM C 9-3 NIR 11 08 38.197 -77 43 51.75           ~ 3 0
45 NAME Cha IR Nebula TT* 11 08 38.702 -77 43 51.54           M5.5 72 0
46 V* VY Cha Or* 11 08 54.6059374368 -77 02 13.006464720   14.8     13.60 K8Ve 75 0
47 V* HU Cha Or* 11 09 18.12888 -76 30 29.2500         14.99 M1/2e 56 0
48 V* HV Cha Or* 11 09 22.6489972128 -76 34 32.164757616         16.79 M0.75-M1.75 53 0
49 V* HW Cha Or* 11 09 41.9146999920 -76 34 58.572141600           M0- 34 0
50 HJM C 1-24 TT* 11 09 46.1881553592 -76 34 46.503994080   11.93 18.41   14.72 M3.25e 62 1
51 BYB 43 Y*O 11 09 47.3883040248 -77 26 29.187831192         16.62 M3.25e 53 0
52 Ass Cha T 1-23 Or* 11 09 53.4189070920 -76 34 25.652641116   13.9 19.50 15.10 13.52 G9IIIe 96 0
53 V* HX Cha Or* 11 09 54.062760 -76 29 25.54332       16.08 14.03 M3.5+M7 71 0
54 HJM C 1-2 Or* 11 09 55.0429130952 -76 32 41.105143464         17.85 M0- 32 0
55 HJM C 1-4 Y*O 11 10 03.6830951520 -76 33 29.218685616     18.78 16.1 14.72 K8e 62 0
56 HJM C 1-8 Y*O 11 10 11.3918141448 -76 35 29.247545184         13.75 K5Ve 59 0
57 Ass Cha T 1-27 Or* 11 10 49.5667074984 -77 17 51.754670016   16.80 16.64   13.84 M4Ve 83 0
58 V* IK Cha Or* 11 10 53.5796812512 -77 25 00.472704888         17.51 M4.5 34 0
59 V* XX Cha Or* 11 11 39.6728641032 -76 20 15.032221548   16.67 15.28   12.56 M3Ve 116 1
60 V* CW Cha Or* 11 12 30.9285677040 -76 44 24.000940464   15.75 14.45 15.19 13.60 ~ 63 1
61 NAME Chamaeleon Region SFR 11 55 -78.0           ~ 806 0
62 V* DK Cha TT* 12 53 17.2111480272 -77 07 10.736046012           F0e 142 0
63 NAME Cha II MoC 12 54 -77.2           ~ 337 0
64 IRAS 12535-7623 Y*O 12 57 11.6949853032 -76 40 11.291754000   17.20 15.00     M0e 42 0
65 2MASS J12580676-7709094 Y*O 12 58 06.6784743816 -77 09 09.650462868         19.61 M6 22 0
66 2MASS J12590656-7707401 Y*O 12 59 06.56 -77 07 40.1           K4.5 48 0
67 RX J1300.9-7708B * 13 00 53.2360864848 -77 09 09.303222348           ~ 9 0
68 Sz 49 Y*O 13 00 53.2473650928 -76 54 15.206649912   15.6       M0.5 43 0
69 RX J1300.9-7708 Y*O 13 00 53.46120 -77 09 08.6580           M1 23 0
70 Sz 50 Y*O 13 00 55.3820751133 -77 10 22.247668674   17.64 16.01     M3 45 0
71 V* CM Cha TT* 13 02 13.5244979592 -76 37 57.818696016   14.70 13.40     K7IVe 42 0
72 IRAS 13005-7633 mul 13 04 23.96 -76 50 02.0           ~ 11 0
73 Hn 23 Y*O 13 04 24.1091476992 -76 50 01.203848088           K7e 24 0
74 Hn 24 Y*O 13 04 55.7191411392 -77 39 49.222352340           M0 31 0
75 Sz 53 Y*O 13 05 12.6752612232 -77 30 52.566390396   17.85 16.59     M1 31 0
76 Sz 56 Y*O 13 06 38.7881087232 -77 30 35.274308688   18.53 17.08     M4 22 0
77 Sz 57 Y*O 13 06 56.5765655088 -77 23 09.640416696   19.56 17.70     M5 20 0
78 Sz 58 Em* 13 06 57.4252298184 -77 23 41.593041672   17.89 16.01     K5 32 0
79 V* BM Cha Or* 13 08 06.2695235808 -77 55 05.329818156   16.77 14.60     K5 55 0
80 2MASS J13090987-7709437 Y*O 13 09 09.9088695936 -77 09 43.801176816       15.37 14.04 M0.5 12 0
81 2MASS J13091071-7709443 Y*O 13 09 10.71600 -77 09 44.3628       13.47 12.42 M1.5 8 0
82 Sz 65 Or* 15 39 27.7716659160 -34 46 17.211087984   13.11 12.13 11.33 10.76 K7 100 0
83 Sz 66 TT* 15 39 28.2828956688 -34 46 18.082914564   14.9   14.51 12.56 M2 59 0
84 Sz 67 TT* 15 40 38.2653596544 -34 21 36.440447616   13.8   12.85 11.49 ~ 13 0
85 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 286 0
86 2MASS J15450887-3417333 Y*O 15 45 08.8742780880 -34 17 33.454839372       18.73   M5.5 45 0
87 CD-33 10685 Or* 15 45 12.8678037432 -34 17 30.644403036 12.47 11.56 10.224 9.60 8.685 K3Ve 272 1
88 V* HW Lup Or* 15 45 17.4118414392 -34 18 28.286447220   17.41 16.25     M1 74 0
89 2MASS J15451851-3421246 Y*O 15 45 18.5160315960 -34 21 24.553939896   17.95   17.35   M6.5 21 0
90 V* GW Lup Or* 15 46 44.7290527536 -34 30 35.677420056   13.8       M1.5e 143 0
91 V* HM Lup Or* 15 47 50.6288371920 -35 28 35.404076028   15.941 14.748 14.337   M3e 83 0
92 THA 15-5 TT* 15 47 56.9427182064 -35 14 34.796420412   14.5 16.2     K7e 85 0
93 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 290 1
94 THA 15-12 Or* 15 56 09.2066646912 -37 56 06.126118692   13.12 11.93 11.45   M0e 420 0
95 V* RU Lup TT* 15 56 42.3108692112 -37 49 15.473946900 9.27 10.07 9.60     K7/M0e 469 0
96 Lupus 2 MoC 15 57 08 -37 47.1           ~ 114 1
97 Sz 84 TT* 15 58 02.5198436808 -37 36 02.729938536   14.3       M5.0e 72 0
98 V* RY Lup Or* 15 59 28.3864710696 -40 21 51.249496176   12.62 9.90     G8/K1IV-V 223 0
99 IRAS 15567-4141 LP* 16 00 07.4120207112 -41 49 48.691592652       16.30   ~ 15 1
100 IRAS 15571-4217 LP* 16 00 34.3942102824 -42 25 38.575025004   16.92 17.39 15.56   ~ 9 0
101 V* MY Lup TT* 16 00 44.5202267160 -41 55 30.935126748   12.64 12.17 11.06   K0 111 0
102 NAME Lupus Complex SFR 16 03 -38.1           ~ 720 0
103 HD 325367 Or* 16 03 05.4915085848 -40 18 25.426727676   11.40 8.50     M0 356 0
104 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 152 0
105 Sz 133 Y*O 16 03 29.3848659360 -41 40 01.765426548   17.77 16.60 15.78 15.04 K2 48 0
106 V* HO Lup Or* 16 07 00.603672 -39 02 19.49316   13.94 13.17 13.03   M1e 66 0
107 2MASS J16070863-3947219 Y*? 16 07 08.6277721800 -39 47 21.860724696   15.38 14.04 13.50   ~ 7 0
108 THA 15-21 TT* 16 07 10.0694468880 -39 11 03.260683896   15.28 13.70 13.70 12.49 K7-M0 72 0
109 Sz 95 TT* 16 07 52.3109740056 -38 58 06.091698756   16.714 15.189 14.934 12.53 ~ 53 0
110 2MASS J16080618-3912225 LP* 16 08 06.1851371808 -39 12 22.547243232       18.00 13.76 ~ 16 1
111 Sz 96 TT* 16 08 12.6308620920 -39 08 33.470354256   14.80 13.43 13.69 11.84 ~ 79 0
112 THA 15-24 Y*O 16 08 21.8037909864 -39 04 21.491863824   16.18 14.61 14.67 12.92 M3 58 0
113 V* V1279 Sco Or* 16 08 22.4935277520 -39 04 46.427612052   14.99 13.66 11.70 11.21 M0.4 119 1
114 THA 15-25 Y*O 16 08 24.0422612880 -39 05 49.433170740   15.49 16.00 15.39 14.17 M3.5 49 0
115 THA 15-26 Y*O 16 08 25.7633674272 -39 06 01.247043888   16.62 15.43 14.97 13.12 M5 66 0
116 THA 15-29 Y*O 16 08 30.2687378568 -39 06 11.176056000   14.8 11.14 15.18 13.15 M4 64 0
117 IRAS 16051-3820 Y*O 16 08 30.6994064064 -38 28 26.846324004   11.89 11.15 10.67   K2 69 0
118 THA 15-30 TT* 16 08 30.8142130416 -39 05 48.837746436   15.2 15.25 13.96 13.57 M5 61 0
119 V* V856 Sco Ae* 16 08 34.2870044544 -39 06 18.325711332 7.66 7.41 7.05 6.92   A9V_sh 388 0
120 Sz 106 Y*O 16 08 39.7597402848 -39 06 25.321212288   15.1   15.00 14.66 M2.5 47 0
121 Sz 107 Y*O 16 08 41.7980924472 -39 01 37.038551232   17.31 16.06 15.42 13.20 M5.5 40 0
122 V* V1191 Sco Or* 16 08 48.1612456128 -39 04 19.195145724   18.23 16.43 15.71 13.57 M6.5 22 0
123 IRAS 16054-3857 Y*O 16 08 49.3987083072 -39 05 39.447341844   16.76 17.71 15.89 14.24 M4.5 53 0
124 V* V1193 Sco Or* 16 08 51.5693655096 -39 03 17.707587264   15.27 14.58 13.72 12.28 M4.5 70 0
125 UCAC3 102-194910 Y*O 16 08 53.2420957464 -39 14 40.160339952   17.53 16.35 15.35 13.52 M3 49 1
126 THA 15-33 TT* 16 08 54.6849382512 -39 37 43.145069664   15.34 13.98 13.29   M1IVe 92 0
127 Sz 112 Y*O 16 08 55.5289090032 -39 02 33.941081832   16.62 15.39 14.78 12.93 M6 67 0
128 THA 15-34 Y*O 16 08 57.8026653048 -39 02 22.853868252   17.46 16.50 16.64 14.65 M6 59 0
129 THA 15-35 Or* 16 09 01.8486544824 -39 05 12.414717240   15.33 14.12 14.35 12.54 M5.5 108 0
130 Lupus 3 SFR 16 09.6 -39 03           ~ 323 0
131 THA 15-37 Y*O 16 09 44.3607357216 -39 13 30.167581764   15.84 14.59 14.20 12.38 M2 60 0
132 Sz 118 Y*O 16 09 48.6562295568 -39 11 16.847425032   18.32 16.90 16.61 15.00 K6 65 0
133 2MASS J16101857-3836125 Y*O 16 10 18.5677223424 -38 36 12.598346628   18.37 16.63 16.67 14.70 M5 30 0
134 2MASS J16101984-3836065 Y*O 16 10 19.8333629688 -38 36 06.586243272   17.39   16.76 15.57 M6.5 35 0
135 THA 15-42 Y*O 16 10 51.5849835192 -38 53 13.767885384   15.89 14.48 14.44 12.95 M1e 73 0
136 2MASS J16121120-3832197 Y*O 16 12 11.2108041432 -38 32 19.758929100   18.03   17.25 14.76 ~ 21 0
137 2MASS J16122269-3713276 LP* 16 12 22.7052583440 -37 13 27.640524972   17.63 15.63 15.76   ~ 9 0
138 UCAC3 104-204438 Y*O 16 12 43.7499349656 -38 15 03.075603264   15.00 13.44 13.39 11.61 M1 44 0
139 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3631 1
140 ATO J277.4228+01.1271 Y*O 18 29 41.4745809408 +01 07 37.875767772           K2.5 19 0
141 2MASS J18294393+0107208 Y*O 18 29 43.9382095272 +01 07 20.713142784           K7.0 15 0
142 NAME Serpens Cloud SFR 18 29 49 +01 14.8           ~ 1100 2
143 2MASS J18294960+0117058 Y*O 18 29 49.602 +01 17 05.83           ~ 34 0
144 2MASS J18295360+0117017 Y*O 18 29 53.6099956536 +01 17 01.730202216   19.7   16.6   M2.0 21 0
145 2MASS J18295571+0114315 Y*O 18 29 55.711 +01 14 31.50           ~ 39 0
146 GCNM 78 * 18 29 56.0 +01 15 11           ~ 4 0
147 2MASS J18295655+0112596 Y*O 18 29 56.553 +01 12 59.65           ~ 23 0
148 2MASS J18295696+0112478 Y*O 18 29 56.967 +01 12 47.83           M3.0 26 0
149 IRAS 18274+0112 Y*O 18 29 57.73680 +01 14 05.6940           M4: 139 2
150 2MASS J18295781+0115318 Y*O 18 29 57.816 +01 15 31.86           K2.0 22 0
151 2MASS J18295781+0112280 Y*O 18 29 57.819 +01 12 28.05           ~ 21 0
152 2MASS J18295784+0112379 Y*O 18 29 57.849 +01 12 37.90           ~ 23 0
153 2MASS J18295785+0112514 Y*O 18 29 57.858 +01 12 51.40           ~ 60 3
154 2MASS J18295820+0115216 Y*O 18 29 58.2037073472 +01 15 21.610474308           K7.0 40 0
155 2MASS J18295876+0114257 Y*O 18 29 58.765 +01 14 25.78           ~ 25 1
156 2MASS J18300274+0112280 Y*O 18 30 02.747 +01 12 28.06           ~ 28 2
157 2MASS J18300341+0116191 Y*O 18 30 03.4139489400 +01 16 19.094575296   18.9   15.0   M0.0 44 0
158 2MASS J18300770+0112043 Y*O 18 30 07.708 +01 12 04.32           M2.5 16 0

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