2018A&A...616A.100Y


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST02:44:09

2018A&A...616A.100Y - Astronomy and Astrophysics, volume 616A, 100-100 (2018/8-1)

Stellar masses and disk properties of Lupus young stellar objects traced by velocity-aligned stacked ALMA 13CO and C18O spectra.

YEN H.-W., KOCH P.M., MANARA C.F., MIOTELLO A. and TESTI L.

Abstract (from CDS):


Aims. Large samples of protoplanetary disks have been observed in recent ALMA surveys. The gas distributions and velocity structures of most of the disks can still not be imaged at high signal to noise ratios (S/Ns) because of the short integration time per source in these surveys. In this work, we apply the velocity-aligned stacking method to extract more information from molecular-line data of these ALMA surveys and to study the kinematics and disk properties traced by molecular lines.
Methods. We re-analyzed the ALMA 13CO (3-2) and C18O (3-2) data of 88 young stellar objects (YSOs) in Lupus with the velocity-aligned stacking method. This method aligns spectra at different positions in a disk based on the projected Keplerian velocities at their positions and then stacks them. This method enhances the S/Ns of molecular-line data and allows us to obtain better detections and to constrain dynamical stellar masses and disk orientations.
Results. We obtain 13CO detections in 41 disks and C18O detections in 18 disks with 11 new detections in 13CO and 9 new detections in C18O after applying the method. We estimate the disk orientations and the dynamical masses of the central YSOs from the 13CO data. Our estimated dynamical stellar masses correlate with the spectroscopic stellar masses, and in a subsample of 16 sources, where the inclination angles are better constrained, the two masses are in good agreement within the uncertainties and with a mean difference of 0.15M. With more detections of fainter disks, our results show that high gas masses derived from the 13CO and C18O lines tend to be associated with high dust masses estimated from the continuum emission. Nevertheless, the scatter is large and is estimated to be 0.9dex, implying large uncertainties in deriving the disk gas mass from the line fluxes. We find that with such large uncertainties it is expected that there is no correlation between the disk gas mass and the mass accretion rate with the current data. Deeper observations to detect disks with gas masses <10–5M in molecular lines are needed to investigate the correlation between the disk gas mass and the mass accretion rate.

Abstract Copyright: © ESO 2018

Journal keyword(s): protoplanetary disks - circumstellar matter - stars: protostars - ISM: kinematics and dynamics

Simbad objects: 49

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Number of rows : 49

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 Ori Region reg 05 35 17.30 -05 23 28.0           ~ 480 0
2 NAME Cha I MoC 11 06 48 -77 18.0           ~ 968 1
3 Sz 65 Or* 15 39 27.7717320499 -34 46 17.209059896   13.11 12.13 11.33 10.76 K7 70 0
4 NAME Lupus I Cld 15 43 02.1 -34 09 06           ~ 224 0
5 2MASS J15450887-3417333 Y*O 15 45 08.8747567515 -34 17 33.460978147       18.73   M5.5 29 0
6 CD-33 10685 Or* 15 45 12.8670160092 -34 17 30.646921079 12.47 11.56 10.224 9.60 8.685 K3Ve 217 1
7 V* HW Lup Or* 15 45 17.4119603565 -34 18 28.293017151   17.41 16.25     M1 50 0
8 V* GW Lup Or* 15 46 44.7292759994 -34 30 35.677245389   13.8       M1.5e 83 0
9 V* HM Lup Or* 15 47 50.6290613485 -35 28 35.404500425   15.96       M3e 61 0
10 THA 15-5 TT* 15 47 56.9433443193 -35 14 34.797849332   14.5 16.2     K7e 61 0
11 V* RU Lup Or* 15 56 42.3109948086 -37 49 15.473469159 9.27 10.07 9.60     K7/M0e 382 0
12 NAME Lup II MoC 15 57 08 -37 47.1           ~ 90 1
13 Sz 84 TT* 15 58 02.5212129160 -37 36 02.733294310   14.3       M5.0e 50 0
14 WRAY 15-1400 TT* 15 59 16.4714616661 -41 57 10.300292528   13.5 12.0     K7IVe 59 0
15 V* RY Lup Or* 15 59 28.3852522995 -40 21 51.255321659   12.62 9.90     G8/K1IV-V 167 0
16 2MASS J16000236-4222145 Y*O 16 00 02.3596641694 -42 22 14.595263750   16.86 15.46 14.98 13.59 M4 26 0
17 Sz 130 TT* 16 00 31.0374928462 -41 43 36.991093739   15.82 14.71 13.56 12.46 M1.5 42 0
18 V* MY Lup TT* 16 00 44.5199369001 -41 55 30.931594414   12.64 12.17 11.06   K0 57 0
19 2MASS J16011549-4152351 Y*O 16 01 15.492 -41 52 35.19           ~ 22 0
20 NAME Lup Cloud SFR 16 03 -38.1           ~ 517 0
21 NAME Lupus IV MoC 16 03 12.4 -42 07 43           ~ 125 0
22 Sz 133 Y*O 16 03 29.3676884922 -41 40 01.858389664   17.77 16.60 15.78 15.04 K2 30 0
23 V* HO Lup Or* 16 07 00.603672 -39 02 19.49316   13.94 13.17 13.03   M1e 62 0
24 2MASS J16070384-3911113 Y*O 16 07 03.8309506752 -39 11 11.679148554       18.79 16.80 M4.5 27 0
25 2MASS J16070854-3914075 LM* 16 07 08.5541572537 -39 14 07.513184501   17.85   18.67 17.86 M1.75 26 0
26 THA 15-21 TT* 16 07 10.0693512723 -39 11 03.258471635   15.28 13.70 13.70 12.49 K7-M0 50 0
27 Sz 95 TT* 16 07 52.3113021630 -38 58 06.092190897   16.39 14.57 14.25 12.53 ~ 38 0
28 Sz 96 TT* 16 08 12.6306575418 -39 08 33.469578208   14.80 13.43 13.69 11.84 ~ 63 0
29 2MASS J16081497-3857145 Y*O 16 08 14.9860473609 -38 57 14.441818824       18.93 17.42 4.75 33 0
30 V* V1279 Sco Or* 16 08 22.4935035747 -39 04 46.427826148   14.99 13.66 11.70 11.21 M0.4 84 1
31 THA 15-26 Y*O 16 08 25.7651773769 -39 06 01.220655906   16.62 15.43 14.97 13.12 M5 51 0
32 THA 15-29 Y*O 16 08 30.2690257641 -39 06 11.174771741   14.8 11.14 15.18 13.15 M4 51 0
33 IRAS 16051-3820 Y*O 16 08 30.6992185515 -38 28 26.847010777   11.89 11.15 10.67   K2 37 0
34 V* V856 Sco Ae* 16 08 34.2868591379 -39 06 18.326059778 7.66 7.41 7.05 6.92   A7IIIne_sh 351 0
35 NAME Sz 108B Y*O 16 08 42.8841122475 -39 06 14.695751140       17.71 14.39 M5 25 0
36 2MASS J16085373-3914367 Y*O 16 08 53.7314563013 -39 14 36.829640504       21.73 18.76 M5.5 28 0
37 THA 15-33 TT* 16 08 54.6847312618 -39 37 43.145460615   15.34 13.98 13.29   M1IVe 62 0
38 2MASS J16090141-3925119 Y*O 16 09 01.4148763417 -39 25 11.923408383   16.92 15.31 15.04 13.48 M4 32 0
39 THA 15-35 Or* 16 09 01.8488471357 -39 05 12.416220509   15.33 14.12 14.35 12.54 M5.5 70 0
40 2MASS J16092697-3836269 Y*O 16 09 26.975 -38 36 26.92   17.55   16.31 14.74 M4.5 19 0
41 [MJS2008] 94 Y*O 16 09 34.18 -39 15 12.7           ~ 9 0
42 NAME Lupus III SFR 16 09.6 -39 03           ~ 271 0
43 2MASS J16093928-3904316 pr* 16 09 39.290 -39 04 31.69           ~ 8 0
44 Sz 118 Y*O 16 09 48.6557347813 -39 11 16.846032967   18.32 16.90 16.61 15.00 K6 47 0
45 SONYC Lup3-29 Y*O 16 10 01.3309952901 -39 06 44.824860359   18.38 17.42 17.90 15.27 M7.5 22 0
46 2MASS J16101984-3836065 Y*O 16 10 19.8339336690 -38 36 06.581180628   17.39   16.76 15.57 M6.5 25 0
47 2MASS J16102955-3922144 Y*O 16 10 29.5512951868 -39 22 14.456010068   17.51 16.31 15.79 13.90 M4.5 36 0
48 THA 15-42 Y*O 16 10 51.5851116158 -38 53 13.768173219   15.89 14.48 14.44 12.95 M1e 53 0
49 NAME Upper Sco Association As* 16 12 -23.4           ~ 1021 1

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2020.07.10-02:44:09

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