2022AJ....164..201P

Query : 2022AJ....164..201P

2022AJ....164..201P - Astron. J., 164, 201 (2022/November-0)

Towards a Comprehensive View of Accretion, Inner Disks, and Extinction in Classical T Tauri Stars: An ODYSSEUS Study of the Orion OB1b Association.

PITTMAN C.V., ESPAILLAT C.C., ROBINSON C.E., THANATHIBODEE T., CALVET N., WENDEBORN J., HERNANDEZ J., MANARA C.F., WALTER F., ABRAHAM P., ALCALA J.M., ALENCAR S.H.P., ARULANANTHAM N., CABRIT S., EISLOFFEL J., FIORELLINO E., FRANCE K., GANGI M., GRANKIN K., HERCZEG G.J., KOSPAL A., MENDIGUTIA I., SERNA J. and VENUTI L.

Abstract (from CDS):

The coevolution of T Tauri stars and their surrounding protoplanetary disks dictates the timescales of planet formation. In this paper, we present magnetospheric accretion and inner disk wall model fits to near-UV (NUV) to near-IR (NIR) spectra of nine classical T Tauri stars in Orion OB1b as part of the Outflows and Disks around Young Stars: Synergies for the Exploration of ULLYSES Spectra (ODYSSEUS) survey. Using NUV-optical spectra from the Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Director's Discretionary Program and optical-NIR spectra from the PENELLOPE VLT Large Programme, we find that the accretion rates of these targets are relatively high for the region's intermediate age of 5.0 Myr; rates are in the range of (0.5-17.2) × 10–8M☉ yr–1, with a median value of 1.2 × 10–8M☉ yr–1. The NIR excesses can be fit with 1200-1800 K inner disk walls located at 0.05-0.10 au from the host stars. We discuss the significance of the choice in extinction law, as the measured accretion rate depends strongly on the adopted extinction value. This analysis will be extended to the complete sample of T Tauri stars being observed through ULLYSES to characterize accretion and inner disks in star-forming regions of different ages and stellar populations.

Abstract Copyright: © 2022. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Pre-main sequence stars - Stellar accretion - Stellar accretion disks - Protoplanetary disks - Reddening law - Interstellar extinction - Hubble Space Telescope - Very Large Telescope

VizieR on-line data: <Available at CDS (J/AJ/164/201): table3.dat table4.dat table7.dat table8.dat fig1.dat>

Simbad objects: 41

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Number of rows : 41
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* BP Tau Or* 04 19 15.8339827632 +29 06 26.926959492   13.13 12.12 11.89   K5/7Ve 721 0
2 NAME Taurus Complex SFR 04 41.0 +25 52           ~ 4971 0
3 HD 29647 * 04 41 08.0448698568 +25 59 33.949206132 9.69 9.22 8.31 7.35 6.60 B9IIIpHgMn 217 0
4 V* GM Aur Or* 04 55 10.9815576936 +30 21 59.373771876 14.59 13.351 12.242 11.798   K3Ve 797 0
5 V* V397 Aur Or* 04 56 02.0265224208 +30 21 03.670989228   13.07 11.72 11.25   K7e 183 0
6 * o Ori SB* 05 21 45.7473567408 -00 22 56.880734196 3.79 4.58 4.74 4.79 4.97 B2IV 246 0
7 CVSO 17 TT* 05 23 04.7000654808 +01 37 14.911268160     16.15   13.91 M3 24 0
8 * eta Ori bC* 05 24 28.61672 -02 23 49.7311 2.25 3.18 3.35 3.44 3.65 B1V+B2: 412 0
9 * psi01 Ori Be* 05 24 44.8273848312 +01 50 47.201915688 3.83 4.76 4.96 5.04 5.26 B1Vn 372 0
10 NAME 25 Ori Group OpC 05 24 50.9 +01 41 38           ~ 195 1
11 CVSO 36 TT* 05 25 50.3688785339 +01 49 37.058953024     14.89   13.78 M3 32 0
12 * psi02 Ori bC* 05 26 50.2293232104 +03 05 44.422154160 3.45 4.398 4.611     B2IV 218 0
13 Kiso A-0903 176 TT* 05 29 23.2624377048 -01 25 15.450602844     14.79   13.27 K7 51 0
14 Kiso A-0904 1 TT* 05 31 20.6291174208 -00 49 19.847243748     14.72   13.37 K7 38 0
15 * del Ori ** 05 32 00.40009 -00 17 56.7424 0.96 2.02 2.41 2.32 2.54 O9.5IINwk 796 0
16 Haro 5-64 TT* 05 32 06.3834880079 -01 11 00.110270575   15.02 14.22 14.11 12.83 K7 40 0
17 Kiso A-0904 4 TT* 05 32 25.7812188960 -00 36 53.368167024     14.65   12.82 K7 42 0
18 Haro 5-66 TT* 05 32 32.6499109067 -01 13 45.834165548     13.89   12.27 M0 42 0
19 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 281 0
20 Haro 5-73 TT* 05 35 46.0021680168 -00 57 52.235092944     14.11   12.52 K6 42 0
21 HD 290671 * 05 35 48.8983412064 -00 59 21.293547036   8.98 8.98     A2 21 0
22 * eps Ori s*b 05 36 12.81335 -01 12 06.9089 0.48 1.51 1.69 1.76 1.93 B0Ia 921 0
23 NAME Ori I As* 05 38 -02.8           ~ 653 0
24 Kiso A-0904 76 TT* 05 39 02.5746849144 -01 20 32.445597480     13.73   12.33 K6 29 1
25 Haro 5-91 TT* 05 40 24.1515863352 -00 31 21.401551776     15.48   13.04 M3 30 0
26 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 375 0
27 NAME Ori B MoC 05 41 43.0 -01 54 44           ~ 1498 0
28 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
29 V* EG Cha Or* 08 36 56.2143359952 -78 56 45.633633000   11.82 10.457   9.010 K4Ve 110 0
30 V* BX Ant TT* 10 18 28.6987521312 -31 50 02.830052544   13.39 11.454 11.382 9.325 M0Ve 130 0
31 V* CE Ant TT* 10 42 30.1018928760 -33 40 16.229805204   12.21 10.91   9.10 M2Ve 252 1
32 V* TW Hya TT* 11 01 51.9053285064 -34 42 17.033218380   11.94 10.50 10.626 9.18 K6Ve 2144 1
33 NAME TW Hya Association As* 11 01.9 -34 42           ~ 1018 0
34 NAME Cha 1 MoC 11 06 48 -77 18.0           ~ 1266 1
35 CD-29 8887 TT* 11 09 13.7928873024 -30 01 39.968872752   12.95 11.119 10.642 8.875 M2Ve 141 0
36 V* V1215 Cen TT* 11 13 26.2208680752 -45 23 42.720964188     12.478   10.483 K8IVe 89 0
37 V* V1251 Cen TT* 12 34 20.6481372456 -48 15 13.531352148   13.3 12.2   11.90 M3.5 50 0
38 2MASS J15430624-3920194 TT* 15 43 06.2455060656 -39 20 19.483625508     12.25     K6 24 0
39 V* RU Lup TT* 15 56 42.3108692112 -37 49 15.473946900 9.27 10.07 9.60     K7/M0e 528 0
40 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1
41 Ass Ori OB 1a As* ~ ~           ~ 237 0

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