Access to Astronomical Catalogues

← Click to display the menu
J/A+A/366/428     HI observations of nearby dwarf galaxies (Karachentsev+, 2001)

HI observations of nearby galaxies. III. More dwarf galaxies in the northern sky. Karachentsev I.D., Karachentseva V.E., Huchtmeier W.K. <Astron. Astrophys. 366, 428 (2001)> =2001A&A...366..428K
ADC_Keywords: Galaxies, nearby ; H I data ; Radial velocities Keywords: galaxies: distances and redshifts - galaxies: dwarf - galaxies: fundamental parameters - galaxies: general - galaxies: irregular - infrared: galaxies Abstract: We carried out a systematic search for nearby dwarf galaxies in the northern sky based on POSS-II film copies. As a result we present a list of 101 nearby dwarf galaxy candidates mainly of low surface brightness which have angular diameters a>0.5'. About two thirds of the objects are new discoveries. This sample is considered as a supplement to the 163 northern dwarf galaxy candidates (1998, Cat., J/A+AS/127/409) which have been detected in the same declination range around the known Local Volume galaxies and to the 78 dwarf galaxy candidates (1999A&AS..135..221K) in the Local Void region. All the galaxies were observed in HI with the 100-m Effelsberg radio telescope with a detection rate of 46%. The sample of detected galaxies has the following median parameters: radial velocity VLG=+770km/s, HI line width W50=46km/s, absolute blue magnitude MB=-13.8mag, linear diameter A0=2.7kpc, hydrogen mass-to-luminosity ratio MHI/LB=1.2M/L, and the HI mass-to-total mass ratio MHI/Mt=0.28. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 115 101 Optical data for the new northern nearby dwarf galaxies candidates found on the POSS-II. table2.dat 84 101 HI line data for nearby dwarf galaxies tables.tex 91 570 LaTeX version of the tables
See also: J/A+AS/127/409 : New nearby dwarf galaxy candidates list (Karachentseva+ 1998) J/A+AS/139/97 : HI properties of nearby galaxies (Karachentsev+, 1999) J/A+AS/141/469 : First list of the Karachentsev catalog (Huchtmeier+, 2000) J/A+AS/147/187 : Second list of the Karachentsev catalog (Huchtmeier+, 2000) J/A+A/377/801 : Fourth list of the Karachentsev catalog (Huchtmeier+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- KKH Running number 5- 6 I2 h RAh Right ascension (1950.0) 8- 9 I2 min RAm Right ascension (1950.0) 11- 14 F4.1 s RAs Right ascension (1950.0) 16 A1 --- DE- Declination sign (1950.0) 17- 18 I2 deg DEd Declination (1950.0) 20- 21 I2 arcmin DEm Declination (1950.0) 23- 24 I2 arcsec DEs Declination (1950.0) 26- 29 F4.2 arcmin ablue Blue plate major angular diameter (1) 30 A1 --- u_ablue Uncertainty flag on ablue 32- 35 F4.2 arcmin bblue Blue plate minor angular diameter (1) 36 A1 --- u_bblue Uncertainty flag on bblue 38- 41 F4.2 arcmin ared ? Red plate major angular diameter (1) 42 A1 --- u_ared Uncertainty flag on ared 44- 47 F4.2 arcmin bred ? Red plate minor angular diameter (1) 48 A1 --- u_bred Uncertainty flag on bred 50- 53 A4 --- MType Morphological type in the usual designations (2) 55- 56 A2 --- SB Mean surface brightness indicator (3) 58- 73 A16 --- Names Other names as given in the NED (NASA Extragalactic Database) 75- 78 F4.1 mag Bmag ? Apparent blue magnitude of the galaxy (4) 80- 83 F4.2 mag AB Galactic extinction AB from Schlegel et al. (1998) 85-114 A30 --- Notes Comments concerning structure, color, and heliocentric radial velocity
Note (1): Diameters to the limiting isophote ~(26.5-27.0)mag/arcmin2 with an accuracy of ∼15% Note (2): Morphological type: Sph = spheroidal Ir = irregular Sm = irregular with signs of spiral structure Note (3): Mean surface brightness: H = high (22 - 23 mag/arcsec2) L = low (∼24 mag/arcsec2) VL = very low (∼25 mag/arcsec2) EL = extremely low (∼26 mag/arcsec2) Note (4): Apparent blue magnitude of the galaxy estimated visually with an accuracy of 0.5 mag based on comparison with other LSB galaxies having photometrically measured total magnitudes
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 I3 --- KKH Running number 5- 6 A2 --- l_SHI [≥ ] Limit flag on SHI 7- 12 F6.2 SHI ? HI flux 13- 16 I4 mJy Smax ? Maximum flux density emission 18- 21 F4.1 mJy e_Smax ? rms noise 23- 26 I4 km/s HRV ? Mean heliocentric radial velocity 28 I1 km/s e_HRV ? rms uncertainty on HRV 30- 32 I3 km/s LW50 ? Line width at the 50% level of peak emission 34- 36 I3 km/s LW25 ? Line width at the 25% level of peak emission 38- 40 I3 km/s LW20 ? Line width at the 20% level of peak emission 41 A1 --- u_LW20 Uncertainty flag on LW20 43- 46 I4 km/s RV ? Radial velocity with respect to the Local Group centroid (1) 48- 52 F5.1 mag BMAG ? Integral absolute magnitude (2) 54- 56 F3.1 Sun MHI/LB ? Integrated HI mass-to-luminosity ratio (3) 57 A1 --- u_MHI/LB Uncertainty flag on MHI/LB 59- 62 F4.1 Sun M/LB ? Galaxy total mass-to-luminosity ratio (4) 64- 84 A21 ---- Comm Comments concerning galaxy membership in groups or cases of confusion with galactic hydrogen emission
Note (1): Radial velocity with respect to the Local Group centroid with the solar apex parameters: VA=316km/s, lA=93°, bA=-4°, Karachentsev and Makarov (1996AJ....111..794K), Schlegel et al. (1998ApJ...500..525S) assuming a kinematic distance D=VLG/H with a Hubble constant of 75 km/s/Mpc. Note (2): Integral absolute magnitude corrected for galactic extinction AB (Schlegel et al. 1998ApJ...500..525S) assuming a kinematic distance D=VLG/H with a Hubble constant of 75km/s/Mpc Note (3): (MHI/Msun)=2.35*105*D2*SHI Note (4): Where the indicative total mass M=0.83*104*a*W502*D is expressed via the measured angular diameter in arcmin and the HI line width W50 at 50% of the peak intensity, in km/s; here we did not introduce a correction for the galaxy inclination because of its uncertainty for irregular galaxies, and the calculated value is a minimum for the total galaxy mass inside the isophote of ∼27mag/arcsec2
Acknowledgements: Walter Huchtmeier
(End) Patricia Bauer [CDS] 25-Jan-2001
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

© Unistra/CNRS