2012ApJ...753..149M


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.20CET00:58:36

2012ApJ...753..149M - Astrophys. J., 753, 149 (2012/July-2)

YSOVAR: six pre-main-sequence eclipsing binaries in the Orion Nebula Cluster.

MORALES-CALDERON M., STAUFFER J.R., STASSUN K.G., VRBA F.J., PRATO L., HILLENBRAND L.A., TEREBEY S., COVEY K.R., REBULL L.M., TERNDRUP D.M., GUTERMUTH R., SONG I., PLAVCHAN P., CARPENTER J.M., MARCHIS F., GARCIA E.V., MARGHEIM S., LUHMAN K.L., ANGIONE J. and IRWIN J.M.

Abstract (from CDS):

Eclipsing binaries (EBs) provide critical laboratories for empirically testing predictions of theoretical models of stellar structure and evolution. Pre-main-sequence (PMS) EBs are particularly valuable, both due to their rarity and the highly dynamic nature of PMS evolution, such that a dense grid of PMS EBs is required to properly calibrate theoretical PMS models. Analyzing multi-epoch, multi-color light curves for ∼2400 candidate Orion Nebula Cluster (ONC) members from our Warm Spitzer Exploration Science Program YSOVAR, we have identified 12 stars whose light curves show eclipse features. Four of these 12 EBs are previously known. Supplementing our light curves with follow-up optical and near-infrared spectroscopy, we establish two of the candidates as likely field EBs lying behind the ONC. We confirm the remaining six candidate systems, however, as newly identified ONC PMS EBs. These systems increase the number of known PMS EBs by over 50% and include the highest mass (θ1 Ori E, for which we provide a complete set of well-determined parameters including component masses of 2.807 and 2.797 M) and longest-period (ISOY J053505.71-052354.1, P ∼ 20 days) PMS EBs currently known. In two cases (θ1 Ori E and ISOY J053526.88-044730.7), enough photometric and spectroscopic data exist to attempt an orbit solution and derive the system parameters. For the remaining systems, we combine our data with literature information to provide a preliminary characterization sufficient to guide follow-up investigations of these rare, benchmark systems.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - open clusters and associations: individual: Orion - stars: pre-main sequence - stars: variables: general

VizieR on-line data: <Available at CDS (J/ApJ/753/149): table1.dat table6.dat table7.dat table8.dat table9.dat table10.dat table11.dat>

Simbad objects: 29

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Number of rows : 29

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 Taurus Dark Cloud SFR 04 41.0 +25 52           ~ 3352 0
2 ASAS J052821+0338.5 EB* 05 28 20.8305520540 +03 38 32.608040911           ~ 20 0
3 V* V1642 Ori A * 05 29 20.6218092175 +00 41 27.941912748           K1V 14 0
4 V* V1642 Ori TT* 05 29 20.633592 +00 41 27.99600   13.31 12.31 12.03   K2 45 0
5 V* V1174 Ori Or* 05 34 27.8535605060 -05 41 37.876152541 16.506 15.070 14.305   12.367 M0 49 0
6 V* V1448 Ori Or* 05 34 46.0160221485 -04 49 22.044609421   16.8 17.43     K5 9 0
7 2MASS J05345431-0454129 Y*O 05 34 54.317 -04 54 12.98           M4-M5 7 0
8 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 1920 1
9 2MASS J05350571-0523540 Y*O 05 35 05.7174446392 -05 23 54.067127182   18.356 17.345   13.665 M5-M6 28 0
10 V* V2212 Ori Al* 05 35 11.1412127665 -05 36 51.210193000 18.461 16.619 15.379   12.444 M2 48 0
11 2MASS J05351214-0531388 Y*O 05 35 12.1463732749 -05 31 38.821108760 19.716 18.292 17.169 15.68 13.554 M5 50 0
12 V* V1501 Ori Or* 05 35 15.5536588458 -05 25 14.150036747   15.163 14.077   11.527 K4-M1 50 0
13 * tet01 Ori E SB* 05 35 15.7734880 -05 23 09.871626     11.1     G2IV 85 0
14 * tet01 Ori A Ae* 05 35 15.8252169327 -05 23 14.332546552 5.87 6.75 6.73 6.42 6.21 B0V 457 1
15 * tet01 Ori C ** 05 35 16.46375 -05 23 22.8486 4.20 5.15 5.13 4.91 4.73 O7Vp 1262 1
16 NAME Trapezium Cluster As* 05 35 16.5 -05 23 14           ~ 1438 1
17 M 42 HII 05 35 17.3 -05 23 28           ~ 3677 0
18 2MASS J05351802-0522052 EB* 05 35 18.0305971884 -05 22 05.395532385     19.06   14.694 K0-K3 28 0
19 V* V357 Ori Or* 05 35 21.5792456705 -05 09 49.679398391     17.06   14.590 M3 41 0
20 V* V2384 Ori Al* 05 35 21.8463185314 -05 46 08.560286991       19.21 17.28 M7 86 1
21 Brun 691 *iN 05 35 26.8852040661 -04 47 30.734076005   13.3 12.29   11.08 K0-K2 19 0
22 2MASS J05360595-0500413 EB* 05 36 05.9517832423 -05 00 41.273509940           ~ 5 0
23 NAME ORI MOL CLOUD MoC 05 56 -01.8           ~ 821 1
24 V* V578 Mon EB* 06 32 00.6080933581 +04 52 40.879145861 8.01 8.72 8.55 8.09 8.28 B0V+B1V 92 0
25 * 9 Cha Al* 08 43 12.1978606956 -79 04 12.366179858   6.28 6.07     A7V 205 0
26 NAME TW Hya Association As* 11 01.9 -34 42           ~ 797 0
27 CD-35 9931 TT* 14 58 37.6885363563 -35 40 30.390196098   11.92 10.75   9.85 K2.5IV 27 0
28 V* TY CrA Ae* 19 01 40.8312189956 -36 52 33.801844387 10.03 9.92 9.39     B9e 267 0
29 V* EK Cep Al* 21 41 21.5039950844 +69 41 34.108387051   7.95 7.89     A0V 198 0

    Equat.    Gal    SGal    Ecl

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2020.01.20-00:58:36

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