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J/AJ/129/829       Hα emission stars in NGC 2264             (Dahm+, 2005)

The T Tauri star population of the young cluster NGC 2264. Dahm S.E., Simon T. <Astron. J., 129, 829-855 (2005)> =2005AJ....129..829D
ADC_Keywords: Clusters, open ; Stars, pre-main sequence ; Photometry, Cousins ; Equivalent widths ; Stars, emission Keywords: accretion, accretion disks - open clusters and associations: individual (NGC 2264) - stars: formation - stars: pre-main-sequence - stars: rotation Abstract: An Hα emission survey of the young cluster NGC 2264 in the Mon OB1 association resulted in the detection of 490 Hα emission stars in a 25'x40' field approximately centered between the O7 V multiple star S Mon and the Cone Nebula. The survey was carried out with the wide-field grism spectrograph (WFGS) on the University of Hawaii 2.2m telescope on Mauna Kea. X-ray observations made with the European Photon Imaging Camera (EPIC) on board the European Space Agency's XMM-Newton satellite observatory will be discussed in a subsequent paper. Optical (BVRCIC) photometry was obtained for selected fields to supplement similar data from the literature. Spectra covering the 6000-8000Å region at a resolution of R∼3000 (adequate for the determination of Li I λ6708 line strengths) were obtained for 150 Hα and X-ray emission sources with the Gemini Multi-Object Spectrograph (GMOS). Description: An Hα emission survey of NGC 2264 was conducted between 1990 January and 2003 January using the Wide Field Grism Spectrograph (WFGS) at the f/10 Cassegrain focus of the University of Hawaii (UH) 2.2m telescope on Mauna Kea. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 116 490 Hα emission stars in NGC 2264
See also: J/AJ/127/2228 : VRI photometry of PMS stars in NGC 2264 OB (Makidon+, 2004) J/A+A/417/557 : Rotation + variability of PMS Stars in NGC 2264 (Lamm, 2004) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- DS Identification number (Cl* NGC 2264 DS NNN in Simbad) 5- 6 I2 h RAh Hour of Right Ascension (J2000) (1) 8- 9 I2 min RAm Minute of Right Ascension (J2000) (1) 11- 15 F5.2 s RAs Second of Right Ascension (J2000) (1) 17 A1 --- DE- Sign of the Declination (J2000) (1) 18- 19 I2 deg DEd Degree of Declination (J2000) (1) 21- 22 I2 arcmin DEm Arcminute of Declination (J2000) (1) 24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000) (1) 29- 33 F5.2 mag Vmag ? The V band magnitude (2) 35- 38 F4.2 mag V-Rc ? The (V-R_c_) color (2) 40- 43 F4.2 mag V-Ic ? The (V-I_c_) color (2) 45- 49 F5.2 mag Jmag ? 2MASS (Cat. II/246) J band magnitude 51- 54 F4.2 mag J-H ? 2MASS (Cat. II/246) (J-H) color 56- 59 F4.2 mag H-K ? 2MASS (Cat. II/246) (H-K) color 61- 68 A8 --- SpType Spectral type (3) 70- 75 F6.2 0.1nm EW(Ha) ? Halpha equivalent width in Angstroms (4) 76 A1 --- f_EW(Ha) [:k] Flag on EW(Ha) (5) 78- 81 F4.2 0.1nm EW(Li) ? LiI equivalent width in Angstroms (6) 82 A1 --- u_EW(Li) Uncertainty flag in EW(Li) 84- 88 F5.2 [10-7W] logL ? Log of the XMM-EPIC X-ray luminosity in units of erg/s 90- 94 F5.2 [10-7W] e_logL ? The 1σ error in logL 96- 99 A4 --- Ha Known emission source Halpha number (7) 101-106 A6 --- RMS The Rebull et al. (2002, Cat. J/AJ/123/1528) number (Cl* NGC 2264 RMS NNNN in Simbad) 108-115 A8 --- GCVS General Catalog of Variable Stars designation (Cat. II/250)
Note (1): Astrometry obtained from plate solutions for UH 2.2 meter optical imaging, literature, DSS, or SIMBAD Note (2): Optical photometry from UH 2.2m, Sung et al. (1997AJ....114.2644S), Flaccomio et al. (1999, Cat. J/A+A/345/521), Park et al. (2000AJ....120..894P), Rebull et al. (2002, Cat. J/AJ/123/1528), or Lamm et al. (2004, Cat. J/A+A/417/557). Note (3): Spectral types from GMOS data or the literature. Note (4): From WFGS or GMOS spectroscopy. Note (5): Flag on EW(Ha), defined as follows: : = uncertain value; k = Strong emission with weak or no continuum. Note (6): From GMOS spectroscopy. Note (7): Known emission source Hα number, defined as follows: LNNN = LkHA NNN (Herbig, 1954ApJ...119..483H); KNNN = KHA NNN (Ogura, 1984PASJ...36..139O); ENNN = ESO-HA NNN (Reipurth et al., 2004AJ....127.1117R); HNNN = HBC NNN; NNN = IfAHA NNN. If previously unknown, an IfAHA number was assigned continuing the numbering convention of Herbig (1998, Cat. J/ApJ/497/736), Herbig & Dahm (2002, Cat. J/AJ/123/304), and Herbig et al. (2004, Cat. J/AJ/128/1233).
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 23-Aug-2005
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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