2023A&A...671A..46M

Query : 2023A&A...671A..46M

2023A&A...671A..46M - Astronomy and Astrophysics, volume 671A46 (2023/3-1)

New members of the Lupus I cloud based on Gaia astrometry Physical and accretion properties from X-shooter spectra.

MAJIDI F.Z., ALCALA J.M., FRASCA A., DESIDERA S., MANARA C.F., BECCARI G., D'ORAZI V., BAYO A., BIAZZO K., CLAUDI R., COVINO E., MANTOVAN G., MONTALTO M., NARDIELLO D., PIOTTO G. and RIGLIACO E.

Abstract (from CDS):

We characterize twelve young stellar objects (YSOs) located in the Lupus I region, spatially overlapping with the Upper Centaurus Lupus (UCL) sub-stellar association. The aim of this study is to understand whether the Lupus I cloud has more members than what has been claimed so far in the literature and gain a deeper insight into the global properties of the region. We selected our targets using the Gaia DR2 catalog based on their consistent kinematic properties with the Lupus I bona fide members. In our sample of twelve YSOs observed by X-shooter, we identified ten Lupus I members. We could not determine the membership status of two of our targets, namely Gaia DR2 6014269268967059840 and 2MASS J15361110-3444473 due to technical issues. We found out that four of our targets are accretors, among them, 2MASS J15551027-3455045, with a mass of ∼0.03 M⊙, is one of the least massive accretors in the Lupus complex identified to date. Several of our targets (including accretors) are formed in situ and off-cloud with respect to the main filaments of Lupus I; hence, our study may hint that there are diffused populations of M dwarfs around Lupus I main filaments. In this context, we would like to emphasize that our kinematic analysis with Gaia catalogs played a key role in identifying the new members of the Lupus I cloud.

Abstract Copyright: © The Authors 2023

Journal keyword(s): accretion - accretion disks - stars: atmospheres - stars: activity - stars: chromospheres - stars: low-mass - stars: pre-main sequence

Simbad objects: 77

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Number of rows : 77
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 V* DH Tau Or* 04 29 41.5525353432 +26 32 58.126559604 15.14 14.62 13.10 13.01   M1Ve 323 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
3 V* GQ Tau EB* 05 41 34.9488618120 +25 59 52.989632088   11.84 11.39     B9 23 0
4 * gam02 Vel WR* 08 09 31.95013 -47 20 11.7108 0.64 1.58 1.83 1.85 2.00 WC8+O7.5III-V 951 0
5 NAME Upper Centaurus Lupus MGr 15 24 -41.9           ~ 567 1
6 CD-36 10208 TT* 15 29 47.2648270536 -36 28 37.407579780   12.60 11.16   10.644 K2IVe 26 0
7 Gaia DR2 6014224051546189568 * 15 34 42.0511674377 -34 17 48.093291010           ~ 3 0
8 Gaia DR2 6014049985115937408 * 15 34 59.2112800194 -34 58 16.158046483           ~ 3 0
9 2MASS J15361110-3444473 Y*O 15 36 11.1090786384 -34 44 47.519889350           M5.5 3 0
10 TYC 7335-550-1 Y*O 15 36 11.5499030976 -34 45 20.545710408   13.05 12.12     K4.5 6 0
11 IRAS 15334-3411 Y*? 15 36 39.9175433736 -34 21 42.168127212   16.621 15.105 15.379   ~ 7 0
12 2MASS J15365530-3345221 Y*O 15 36 55.3035276272 -33 45 22.183865333           M6 5 0
13 Gaia DR2 6013190201383772288 * 15 37 53.0048809125 -35 52 28.695339241           ~ 4 0
14 UCAC4 271-080669 Y*? 15 37 53.3147597832 -35 55 12.429329664   17.333 15.760 15.756   ~ 5 0
15 Gaia DR3 6016191485871670400 * 15 38 35.6319827900 -32 02 37.656536423           ~ 2 0
16 2MASS J15383733-3422022 Y*O 15 38 37.3383466944 -34 22 02.257002156       17.25 15.25 M5 6 0
17 2MASS J15392180-3400195 Y*? 15 39 21.8134716552 -34 00 19.564829784       18.81 16.29 M5.5 8 0
18 UCAC4 271-080902 * 15 39 24.4661105597 -35 58 50.876849724   13.194 12.122 11.951   ~ 4 0
19 Gaia DR3 6016139332082870272 * 15 39 25.8781477602 -32 10 04.673715450           ~ 2 0
20 Sz 65 Or* 15 39 27.7716659160 -34 46 17.211087984   13.11 12.13 11.33 10.76 K7 118 0
21 Sz 66 TT* 15 39 28.2828956688 -34 46 18.082914564   14.9   14.51 12.56 M2 75 0
22 RX J1539.7-3450B Y*O 15 39 46.3700224680 -34 51 03.666304152           ~ 4 0
23 RX J1539.7-3450A Or* 15 39 46.3761621288 -34 51 02.536503264           ~ 7 0
24 2MASS J15414081-3345188 Or* 15 41 40.8086577936 -33 45 18.847533888         17.38 M6.5 25 0
25 UCAC3 110-180365 Y*O 15 41 48.2824525608 -35 01 45.834190248       14.34 12.60 M4 8 0
26 Gaia DR2 6013030875279571328 * 15 41 55.2152277243 -35 59 35.356923877           ~ 4 0
27 Lupus 1 Cld 15 43 02.1 -34 09 06           ~ 320 0
28 UCAC4 272-080482 Y*? 15 43 15.6191778888 -35 39 38.177999100   13.945 12.684 12.474   ~ 7 0
29 UCAC4 274-080590 Y*? 15 43 28.4770947432 -35 17 27.397590900   17.776 16.181 15.930   ~ 5 0
30 Gaia DR2 6009936093645659136 * 15 43 49.4335464878 -36 48 38.640371146           ~ 3 0
31 2MASS J15440096-3531056 Y*O 15 44 00.9579213299 -35 31 05.712239147           ~ 6 0
32 2MASS J15443392-3352540 Y*O 15 44 33.9173046744 -33 52 54.112039356       17.16 15.05 M5.5 6 0
33 2MASS J15445789-3423392 Or* 15 44 57.8922421008 -34 23 39.355357344   18.38 17.74 17.29 15.28 M5.0e 39 0
34 CD-33 10685C Y*O 15 45 12.6670289688 -34 17 29.378995188           ~ 7 0
35 CD-33 10685 Or* 15 45 12.8678037432 -34 17 30.644403036 12.47 11.56 10.224 9.60 8.685 K3Ve 306 1
36 V* HW Lup Or* 15 45 17.4118414392 -34 18 28.286447220   17.41 16.25     M1 87 0
37 2MASS J15451851-3421246 Or* 15 45 18.5160315960 -34 21 24.553939896   17.95   17.35   M6.5 27 0
38 IRAS 15422-3414 LM* 15 45 29.7779464056 -34 23 38.800962384           ~ 12 0
39 CD-35 10498 TT* 15 46 41.2077442728 -36 18 47.458696608 12.21 12.24 11.21 10.00 9.44 K1e 27 0
40 Sz 70 Or* 15 46 42.9900610584 -34 30 11.542672224   18.033 16.31     M5 14 0
41 [KWS97] Lupus 1 37 X 15 46 44.55 -34 30 26.2           ~ 2 0
42 V* GW Lup Or* 15 46 44.7290527536 -34 30 35.677420056   13.8       M1.5e 201 0
43 UCAC4 273-083363 Y*O 15 46 46.1503635192 -35 24 11.402241660   17.434 15.676 15.453   M3.5 7 0
44 RX J1546.7-3210 TT* 15 46 46.6441236336 -32 10 00.625119024           M2 7 0
45 V* HM Lup Or* 15 47 50.6288371920 -35 28 35.404076028   15.941 14.748 14.337   M3e 103 0
46 THA 15-5 TT* 15 47 56.9427182064 -35 14 34.796420412   14.5 16.2     K7e 95 0
47 UCAC4 282-082547 Y*? 15 47 58.0846500240 -33 46 59.530538136   17.048 15.407 15.209   ~ 4 0
48 UCAC4 274-081081 Y*O 15 48 06.2572133760 -35 15 48.150290052       15.727   ~ 5 0
49 UCAC4 272-081081 Y*? 15 48 13.1630832528 -35 43 31.082418156   17.179 15.502 15.150   ~ 6 0
50 Gaia DR2 6015222957871475584 * 15 48 46.1240259522 -33 18 35.474469551           ~ 3 0
51 V* GQ Lup Or* 15 49 12.1053805848 -35 39 05.058139788 12.19 12.76 11.66 11.15   K7Ve 334 1
52 V* GQ Lup C LM* 15 49 13.3077704592 -35 39 11.761171488           M4 11 1
53 Sz 76 TT* 15 49 30.7355449512 -35 49 51.413284020   16.611 15.095 14.710   M3.2 58 0
54 Gaia DR2 6015141830223216640 * 15 50 19.1711445047 -33 50 07.120881050           ~ 3 0
55 Gaia DR2 6011261726715424128 * 15 50 29.1940877626 -36 25 11.803275198           ~ 3 0
56 UCAC4 279-083370 Y*? 15 50 46.5036739416 -34 22 38.499182976   15.128 13.761 13.487   ~ 5 0
57 Sz 77 TT* 15 51 46.9580885472 -35 56 44.112678504   12.0       K5.5 86 0
58 2MASS J15523574-3344288 Y*O 15 52 35.7427728600 -33 44 28.855918032           M5.5 3 0
59 UCAC4 292-084899 Y*? 15 52 59.0233980912 -31 38 33.577998864   17.451 16.555 15.712   ~ 3 0
60 UCAC4 283-086052 Y*? 15 53 36.1321856352 -33 31 02.600910408   15.294 13.949 13.517   ~ 4 0
61 2MASS J15551027-3455045 LM* 15 55 10.2762808824 -34 55 04.670530572           M7.5 6 0
62 WRAY 15-1384 TT* 15 56 02.0994258408 -36 55 28.274506140 14.91 14.342 13.470 13.311 11.86 M1 56 0
63 UCAC4 269-083981 Y*O 15 56 19.0596780432 -36 13 25.145609844   15.269 13.811 13.469   M0 4 0
64 Gaia DR3 6010590577947703936 Y*O 15 56 55.3551727298 -36 11 10.730757442           M4.5 5 0
65 Lupus 2 MoC 15 57 08 -37 47.1           ~ 119 1
66 RX J1557.1-3204A Y*? 15 57 09.7605810192 -32 04 33.914130456           ~ 3 0
67 UCAC4 275-083957 Y*? 15 57 20.9623503816 -35 00 01.213679232       15.247   ~ 4 0
68 2MASS J16011870-3437332 Y*O 16 01 18.7010730913 -34 37 33.267757990           M5 5 0
69 NAME Lupus Complex SFR 16 03 -38.1           ~ 851 0
70 Lupus 4 MoC 16 03 12.4 -42 07 43           ~ 163 0
71 Sz 94 TT* 16 07 49.5974149968 -39 04 28.760342844   16.31 16.00 14.76 12.90 ~ 39 0
72 2MASS J16085953-3856275 Or* 16 08 59.5395612120 -38 56 27.592929708       19.25 16.91 M8.5e 38 0
73 Lupus 3 SFR 16 09.6 -39 03           ~ 348 0
74 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
75 Lupus 5 MoC 16 21 -37.5           ~ 63 0
76 GSC 06214-00210 TT* 16 21 54.6676915200 -20 43 09.140591496   13.62 12.38 12.11 11.08 M1e 89 0
77 Lupus 6 Cld 16 25 -40.3           ~ 51 1

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