J/A+A/515/A13 Very low mass objects in ONC (Rodriguez-Ledesma+, 2010)
Rotation-disk connection for very low mass and substellar objects in the Orion Nebula Cluster. Rodriguez-Ledesma M.V., Mundt R., Eisloeffel J. <Astron. Astrophys. 515, A13 (2010)> =2010A&A...515A..13R
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry, infrared Keywords: stars: low-mass - stars: pre-main sequence - stars: rotation - techniques: photometric - brown dwarfs - accretion, accretion disks Abstract: Angular momentum (J) loss requires magnetic interaction between the forming star and both the circumstellar disk and the magnetically driven outflows. In order to test these predictions many authors have investigated a rotation-disk connection in pre-main sequence objects with masses larger than about 0.4M☉. For brown dwarfs (BDs) this connection was not investigated as yet because there are very few samples available. We aim to extend this investigation well down into the substellar regime for our large sample of ≈80 BDs in the Orion Nebula Cluster, for which we have recently measured rotational periods. Description: Table 1 lists the 638 very low mass objects in the Orion Nebula Cluster with magnitudes between 14-21mag in I band for which NIR (JHK) photometry is available. The I band data is from Rodriguez-Ledesma et al. (2009, Cat. J/A+A/502/883) and JHK data from 2MASS, UKIDSS, and VLT. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 71 638 Near-IR photometric data in Orion Nebula Cluster
See also: J/AJ/113/1733 : Orion Nebula Cluster population (Hillenbrand 1997) J/A+A/396/513 : Stellar Rotation in the Orion Nebula Cluster (Herbst+, 2002) J/A+A/502/883 : Very low mass OMC stars I photometry (Rodriguez-Ledesma+, 2009) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 5 I5 --- [H97b] Sequential identification number (G1) 7- 12 F6.3 mag Imag Average I magnitude 14- 18 F5.3 mag e_Imag Error on I magnitude 20- 25 F6.3 mag Jmag J magnitude 27- 31 F5.3 mag e_Jmag ?=9.999 Error on J magnitude (1) 33- 38 F6.3 mag Hmag H magnitude 40- 44 F5.3 mag e_Hmag ?=9.999 Error on H magnitude (1) 46- 51 F6.3 mag Kmag K magnitude 53- 57 F5.3 mag e_Kmag ?=9.999 Error on K magnitude (1) 59- 64 F6.3 mag d<I-K> Δ(I-K), IR excess (indicates the presence of a circumstellar disk when >0.3) 66- 71 A6 --- Flag Origin of the NIR data (2)
Note (1): If = 9.999 no photometric errors available (VLT data set). Note (2): The flag column indicates the origin of the NIR (JHK) photometry. The possibilities are: 2MASS, UKIDSS, and VLT.
Global notes: Note (G1): Identification numbers from Rodriguez-Ledesma et al., 2009, Cat. J/A+A/502/883.
Acknowledgements: Maria Victoria Rodriguez-Ledesma, vicrodriguez(at)mpia.de Max Plank Institute fuer Astronomy & Goettingen University, Germany
(End) M.V. Rodriguez-Ledesma [Max Plank Inst.], P. Vannier [CDS] 27-Jan-2010
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