2024MNRAS.529.1283F

Query : 2024MNRAS.529.1283F

2024MNRAS.529.1283F - Mon. Not. R. Astron. Soc., 529, 1283-1298 (2024/April-1)

A survey for variable young stars with small telescopes - VIII. Properties of 1687 Gaia selected members in 21 nearby clusters.

FROEBRICH D., SCHOLZ A., CAMPBELL-WHITE J., VANAVERBEKE S., HERBERT C., EISLOFFEL J., URTLY T., LONG T.P., WALTON I.L., WIERSEMA K., QUINN N.J., RODDA T., GONZALEZ-CARBALLO J.-L., MORALES AIMAR M., CASTILLO GARCIA R., SOLDAN ALFARO F.C., GARCIA DE LA CUESTA F., LICCHELLI D., ESCARTIN PEREZ A., SALTO GONZALEZ J.L., DELDEM M., FUTCHER S.R.L., NELSON T., DVORAK S., MOZDZIERSKI D., KOTYSZ K., MIKOLAJCZYK P., FLEMING G., PHILLIPS M., VALE T., OGMEN Y., DUBOIS F., ROLFE S.M., CAMPBELL D.A., EGGENSTEIN H.-B., HAMBSCH F.-J., HEALD M.A., LEWIN P., ROSE A.C., STONE G., CROW M.V., DAWES S.F., OKEEFFE D., POPOWICZ A., BERNACKI K., MALCHER A., LASOTA S., FIOLKA J., DUSTOR A., VAJPAYEE A., DEVINE P., KOLB M., MARQUETTE J.-B., RUPPEL G.L., CROWSON D.R., DA SILVA C.M., MICHAUD M., PATEL A.L., DICKERS M.D., DOVER L., GROZDANOVA I.I., URQUHART J.S. and LYNCH C.J.R.

Abstract (from CDS):

The Hunting Outbursting Young Stars (HOYS) project performs long-term, optical, multifilter, high cadence monitoring of 25 nearby young clusters and star-forming regions. Utilizing Gaia DR3 data, we have identified about 17 000 potential young stellar members in 45 coherent astrometric groups in these fields. Twenty one of them are clear young groups or clusters of stars within 1 kpc and they contain 9143 Gaia selected potential members. The cluster distances, proper motions, and membership numbers are determined. We analyse long-term (≈ 7 yr) V-, R-, and I-band light curves from HOYS for 1687 of the potential cluster members. One quarter of the stars are variable in all three optical filters, and two-thirds of these have light curves that are symmetric around the mean. Light curves affected by obscuration from circumstellar materials are more common than those affected by accretion bursts, by a factor of 2-4. The variability fraction in the clusters ranges from 10 per cent to almost 100 per cent, and correlates positively with the fraction of stars with detectable inner discs, indicating that a lot of variability is driven by the disc. About one in six variables shows detectable periodicity, mostly caused by magnetic spots. Two-thirds of the periodic variables with disc excess emission are slow rotators, and amongst the stars without disc excess two-thirds are fast rotators - in agreement with rotation being slowed down by the presence of a disc.

Abstract Copyright: © The Author(s) 2024. Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): stars: formation - stars: pre-main-sequence - stars: rotation - stars: variables: T Tauri, Herbig Ae/Be

Simbad objects: 43

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Number of rows : 43
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 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
2 2MASS J03290964+3122564 Y*O 03 29 09.6424749933 +31 22 56.397116576     17.0     M3.1 36 0
3 IC 348 OpC 03 44 31.1 +32 10 02           ~ 1476 1
4 EM* LkHA 98 TT* 03 44 56.1385232231 +32 09 15.223950537       14.69 5.26 K0 71 0
5 ASASSN -13db ev 05 10 11.08 -03 28 26.3           ~ 27 0
6 V* YY Ori TT* 05 34 47.5333529424 -05 57 56.956399776     13.20   12.32255 K2IVe 144 0
7 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
8 * lam Ori ** 05 35 08.27761 +09 56 02.9611 2.45 3.48 3.66 3.72 3.89 O8IIIf+B0.5V 327 0
9 V* V555 Ori Or* 05 35 08.6997714144 -04 46 52.460046804     17.3     M2.3 46 0
10 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
11 NAME Ori Complex Cld 05 35.3 -05 23           ~ 481 0
12 Cl Collinder 69 OpC 05 35 32.1 +09 44 02     2.8     ~ 369 0
13 NAME LDN 1641 North HII 05 36 17.6 -06 22 10           ~ 252 0
14 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
15 * sig Ori Y*O 05 38 44.7653828520 -02 36 00.283179888 2.54 3.58 3.79 3.87 4.11 O9.5V+B0.2V(n) 855 0
16 V* V898 Ori Or* 05 40 25.6464364152 -07 05 37.244132772     16.8     ~ 19 0
17 M 78 RNe 05 46 45.8 +00 04 45   8.0       ~ 397 0
18 NGC 2244 OpC 06 32 06.9 +04 54 19           ~ 673 1
19 NAME Rosette Nebula HII 06 32 26.76 +04 47 37.1           ~ 522 1
20 NGC 2264 OpC 06 40 53.7 +09 52 32           ~ 1876 0
21 NAME Cone Nebula DNe 06 41.1 +09 53           ~ 91 1
22 2MASS J07092139-1029344 Y*O 07 09 21.3947971032 -10 29 34.509116688           ~ 28 0
23 Gaia 19eyy ev 08 30 42.50 -41 33 42.6   14.29 13.53   13.05 ~ 2 0
24 2MASS J19310560+1827525 Or* 19 31 05.5881891528 +18 27 52.234225920           ~ 44 0
25 [KPR2005] 111 OpC 20 11 31.0 +37 30 18           ~ 38 0
26 IC 4996 OpC 20 16 32.7 +37 38 46           ~ 187 0
27 NAME Feibelman 1 OpC 20 17 40.6 +38 01 56           ~ 23 0
28 * P Cyg s*b 20 17 47.2019733389 +38 01 58.549132671 4.66 5.24 4.82 4.28 4.02 B1-2Ia-0ep 1200 1
29 C 2017+375 OpC 20 18 49.00 +37 45 00.0           ~ 10 0
30 Cl Berkeley 86 OpC 20 20 20.6 +38 42 15           ~ 130 0
31 IC 5070 HII 20 51.0 +44 22           ~ 218 1
32 V* V2492 Cyg Or* 20 51 26.2367188536 +44 05 23.869354488   20.2   18.3   F-GII/MI 107 0
33 ATO J313.1168+44.0586 Or* 20 52 28.0350193656 +44 03 31.074606612           G7.8 8 0
34 NAME Elephant Trunk Nebula MoC 21 36 +57.4           ~ 58 0
35 IC 1396 OpC 21 38 51.4 +57 31 52           ~ 523 1
36 HD 206267 Y*O 21 38 57.6195772032 +57 29 20.554016280 5.09 5.83 5.62   5.56 O6.0V((f))+O9:V 520 0
37 NAME IC 1396 North CGb 21 40 42.6537 +58 16 01.882           ~ 193 1
38 NGC 7129 OpC 21 43 01.1 +66 07 04     11.5     ~ 271 0
39 NGC 7142 OpC 21 45 10.2 +65 47 05   10.36 9.3     ~ 157 0
40 IC 5146 OpC 21 53 29.3 +47 14 46           ~ 507 2
41 ZTF J215330.50+471444.0 Or* 21 53 30.5104249152 +47 14 43.963904796 21.526 19.74 17.84     K5 18 0
42 [FSR2007] 0408 OpC 22 56 31.2 +62 42 30           ~ 2 0
43 NAME III CEP ASSOC As* 23 04.2 +63 24           ~ 332 0

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