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J/A+A/380/590      30 DENIS late-M dwarfs between 15 and 30pc  (Phan-Bao+, 2001)

New neighbours: IV. 30 DENIS late-M dwarfs between 15 and 30 parsecs. Phan-Bao N., Guibert J., Crifo F., Delfosse X., Forveille T., Borsenberger J., Epchtein N., Fouque P., Simon G. <Astron. Astrophys., 380, 590-598 (2001)> =2001A&A...380..590P
ADC_Keywords: Stars, nearby ; Stars, M-type ; Photometry, infrared ; Proper motions Keywords: astrometry - proper motions - low mass stars Abstract: We present 30 new nearby (d<30pc) red dwarf candidates, with estimated spectral types M6 to M8. 26 were directly selected from the DENIS database (B/denis), and another 4 were first extracted from the LHS catalogue (I/87) and cross-identified with a DENIS counterpart. Their proper motions were measured on the MAMA measuring machine from plates spanning 13 to 48 years, and are larger than 0.1arcsec/yr, ruling out the possibility that they are giants. Their distances were estimated from the DENIS colours and IR colour-magnitude relations and range between 15 and 30pc. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table45.dat 96 30 Proper motion, MAMA and DENIS photometry and estimated distances or the 30 DENIS red dwarf candidates (tables 4 & 5 of the paper)
See also: B/denis : The DENIS database (Epchtein+, 1999) I/87 : LHS Catalogue, 2nd Edition (Luyten 1979) I/98 : NLTT Catalogue (Luyten, 1979) J/A+AS/105/179 : New proper-motion stars Dec←40, 16<RA<24h (Wroblewski+ 1994) J/A+A/401/959 : 35 DENIS late-M dwarfs between 10 and 30pc (Phan-bao+, 2003) Byte-by-byte Description of file: table45.dat
Bytes Format Units Label Explanations
1- 15 A15 --- DENIS DENIS name (based on J2000 position) 16 A1 --- New [*] Not previously known as a high proper motion star 18- 23 F6.3 arcsec/yr pmRA Proper motion in right ascension 25- 30 F6.3 arcsec/yr pmDE Proper motion in declination 32- 36 F5.3 arcsec/yr pm Total proper motion 38- 42 F5.3 arcsec/yr pmL ? Total proper motion (1) 44- 47 F4.1 mag Bmag ? B magnitude from the SRC-J plate 49- 52 F4.1 mag Rmag R magnitude from the plates POSS I, SRC-R and ESO-R 54- 58 F5.2 mag Imag DENIS I magnitude 60- 63 F4.2 mag I-J DENIS I-J colour index 65- 68 F4.2 mag J-K DENIS J-K colour index 70- 74 F5.2 mag IMAG Absolute I band magnitude (2) 76- 80 F5.2 mag KMAG Absolute K band magnitude (3) 82- 85 F4.1 pc DistI Estimated distance from IMAG 87- 90 F4.1 pc DistK Estimated distance from KMAG 92- 96 F5.1 km/s Vt Tangential velocity (computed from DistI and proper motion)
Note (1): Literature total proper motion, from Luyten catalogues (Cat. I/98, I/87) or Wroblewski & Torres 1994 (Cat. J/A+AS/105/179) when available Note (2): Absolute I-band magnitude estimated from the (I-J, absolute magnitude) relation of Delfosse, 1997, Ph.D. thesis, Grenoble University. Note (3): Absolute K-band magnitude estimated from the (I-K, absolute magnitude) relation of Tinney et al., 1995AJ....110.3014T.
Acknowledgements: Phan Bao Ngoc, pbngoc(at) References: Delfosse et al., Paper I 1999A&A...344..897D Delfosse et al., Paper II 2001A&A...366L..13D Hambly et al., Paper III 2004A&A...425..997B Phan-Bao et al., Paper V 2003A&A...401..959P, Cat. J/A+A/401/959
(End) Patricia Vannier [CDS] 01-Mar-2005
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