Access to Astronomical Catalogues

← Click to display the menu
J/MNRAS/411/2099    Fast-rotating M-dwarf stars in NGC 2547  (Jeffries+, 2011)

Investigating coronal saturation and supersaturation in fast-rotating M-dwarf stars. Jeffries R.D., Jackson R.J., Briggs K.R., Evans P.A., Pye J.P. <Mon. Not. R. Astron. Soc., 411, 2099-2112 (2011)> =2011MNRAS.411.2099J
ADC_Keywords: Clusters, globular ; Stars, dwarfs ; Stars, M-type ; X-ray sources Keywords: stars: activity - stars: coronae - stars: rotation - open clusters and associations: individual: NGC 2547 - X-rays: stars Abstract: At fast rotation rates, the coronal activity of G- and K-type stars has been observed to "saturate" and then decline again at even faster rotation rates - a phenomenon dubbed "supersaturation". In this paper, we investigate coronal activity in fast-rotating M-dwarfs using deep XMM-Newton observations of 97 low-mass stars of known rotation period in the young open cluster NGC 2547 and combine these with published X-ray surveys of low-mass field and cluster stars of known rotation period. Description: NGC 2547 was observed with XMM-Newton between UT 22:30:03 on 2007 November 12 and UT 09:30:03 on 2007 November 14 using the European Photon Imaging Counter (EPIC) instrument, for a nominal exposure time of 125.8ks (Observation ID 0501790101). The two EPIC-MOS cameras and the EPIC-PN camera were operated in full-frame mode, using the medium filter to reject optical light. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 267 69 X-ray detections of sources in the Irwin et al. (2008, Cat. J/MNRAS/383/1588) catalogue of NGC 2547 members with rotation periods table2.dat 130 28 The properties of stars from the Irwin et al. (2008, Cat. J/MNRAS/383/1588) catalogue that have known rotation periods but were not detected within the XMM-Newton field
See also: J/MNRAS/335/291 : BVI photometry of NGC 2547 (Naylor+, 2002) J/MNRAS/383/1588 : VIc photometry of NGC 2547 low-mass stars (Irwin+, 2008) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 14 A14 --- [IHA2008] Name (N2547-N-N-NNNN) (G1) 16 I1 h RAh Right ascension (J2000) (G1) 18- 19 I2 min RAm Right ascension (J2000) (G1) 21- 25 F5.2 s RAs Right ascension (J2000) (G1) 27 A1 --- DE- Declination sign (J2000) (G1) 28- 29 I2 deg DEd Declination (J2000) (G1) 31- 32 I2 arcmin DEm Declination (J2000) (G1) 34- 37 F4.1 arcsec DEs Declination (J2000) (G1) 39- 43 F5.2 mag Vmag Johnson V magnitude (G2) 45- 48 F4.2 mag V-Ic Johnson-Cousins V-I colour index (G2) 50- 55 F6.3 d Per Rotation period (G1) 57- 61 F5.2 mag BC V-band bolometric correction 63- 67 F5.2 [Lsun] logLbol Bolometric luminosity 69- 72 F4.2 [d] logtc Convective turnover time 74- 78 F5.2 [-] logNr Rossby number 80- 83 F4.2 Msun M Stellar mass 85- 88 F4.2 Rsun R Stellar radius 90- 94 F5.2 --- Rkep/R Keplerian corotation radius as a multiple of the stellar radius 96-104 F9.5 deg RAXdeg X-ray source Right ascension in decimal degrees (J2000) 106-113 F8.4 deg DEXdeg X-ray source Declination in decimal degrees (J2000) 115-121 F7.1 --- ML ?=0 Maximum likelihood of the detection 123-126 F4.2 arcsec Sep ?=0 Separation from optical counterpart 128-135 E8.3 ct/s PN0 ?=-9. Total PN count rate (0.3-3keV) 137-144 E8.3 ct/s e_PN0 ?=-9. rms uncertainty on PN0 146-153 E8.3 ct/s PN1 ?=-9. PN count rate (0.3-1keV, S-band) 155-162 E8.3 ct/s e_PN1 ?=-9. rms uncertainty on PN1 164-171 E8.3 ct/s PN2 ?=-9. PN count rate (1-3keV, H-band) 173-180 E8.3 ct/s e_PN2 ?=-9. rms uncertainty on PN2 182-186 F5.2 --- HR ?=-9. HPN hardness ratio [(H-S)/(H+S)] 188-192 F5.2 --- e_HR ?=-9. rms uncertainty on HR 194-201 E8.3 ct/s M1 ?=-9. Total MOS1 count rate (0.3-3keV) 203-210 E8.3 ct/s e_M1 ?=-9. rms uncertainty on M1 212-219 E8.3 ct/s M2 ?=-9. Total MOS2 count rate (0.3-3keV) 221-228 E8.3 ct/s e_M2 ?=-9. rms uncertainty on M2 230-237 E8.3 mW/m2 Flux X-ray flux (0.3-3keV) 239-246 E8.3 mW/m2 e_Flux rms uncertainty on Flux 248-252 F5.2 --- logLx/L X-ray-to-bolometric luminosity ratio 255-258 F4.2 --- e_logLx/L rms uncertainty on logLx/Lbol 261-267 A7 --- NTJ Naylor et al., 2002, Cat. J/MNRAS/335/291 name <Cl* NGC 2547 NTJ NN-NNNN>
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 14 A14 --- [IHA2008] Name (N2547-N-N-NNNN) (G1) 16 I1 h RAh Right ascension (J2000) (G1) 18- 19 I2 min RAm Right ascension (J2000) (G1) 21- 25 F5.2 s RAs Right ascension (J2000) (G1) 27 A1 --- DE- Declination sign (J2000) (G1) 28- 29 I2 deg DEd Declination (J2000) (G1) 31- 32 I2 arcmin DEm Declination (J2000) (G1) 34- 37 F4.1 arcsec DEs Declination (J2000) (G1) 39- 43 F5.2 mag Vmag Johnson V magnitude (G2) 45- 48 F4.2 mag V-Ic Johnson-Cousins V-I colour index (G2) 51- 55 F5.3 d Per Rotation period (G1) 57- 61 F5.2 mag BC V-band bolometric correction 63- 67 F5.2 [Lsun] logLbol Bolometric luminosity 69- 72 F4.2 [d] logtc Convective turnover time 74- 78 F5.2 [-] logNr Rossby number 80- 83 F4.2 Msun M Stellar mass 85- 88 F4.2 Rsun R Stellar radius 90- 94 F5.2 --- Rkep/R Keplerian corotation radius (relative to the stellar radius) 96- 98 A3 --- Inst Instrument from which X-ray count-rate upper limit was derived (P=PN, M1=MOS1, M2=MOS2, M12 = average from MOS1 and MOS2) 100-107 E8.3 ct/s CR Upper limit count-rate in instrument Inst 109-116 E8.3 mW/m2 Flux Upper limit X-ray flux (0.3-3keV) 118-122 F5.2 --- logLx/L Upper limit X-ray-to-bolometric luminosity ratio 124-130 A7 --- NTJ Naylor et al., 2002, Cat. J/MNRAS/335/291 name <Cl* NGC 2547 NTJ NN-NNNN>
Global notes: Note (G1): From Irwin et al. (2008, Cat. J/MNRAS/383/1588). Note (G2): modified from the Irwin et al. (2008, Cat. J/MNRAS/383/1588) values.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 14-Oct-2011
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

catalogue service

© UDS/CNRS

Contact