J/AJ/160/199 Estimated distances for ∼12000 galaxies with NED-D (Steer, 2020)
Mean estimate distances for galaxies with multiple estimates in NED-D.
Steer I.
<Astron. J., 160, 199 (2020)>
=2020AJ....160..199S 2020AJ....160..199S
ADC_Keywords: Galaxies; Redshifts; Radial velocities
Keywords: Cosmology ; Galaxy distances ; Distance indicators ; Galaxies ;
Extragalactic astronomy
Abstract:
Numerous research topics rely on an improved cosmic distance scale
(e.g., cosmology, gravitational waves) and the NASA/IPAC Extragalactic
Database of Distances (NED-D) supports those efforts by tabulating
multiple redshift-independent distances for 12000 galaxies (e.g.,
Large Magellanic Cloud (LMC) zero-point). Six methods for securing a
mean estimate distance (MED) from the data are presented (e.g.,
indicator and Decision Tree). All six MEDs yield surprisingly
consistent distances for the cases examined, including for the key
benchmark LMC and M106 galaxies. The results underscore the utility of
the NED-D MEDs in bolstering the cosmic distance scale and
facilitating the identification of systematic trends.
Description:
the NASA/IPAC Extragalactic Database of Distances (NED-D) is the
largest compilation of extragalactic distances, containing the
majority of published estimates since 1980. Currently, distances for
150000 galaxies are available, and 12000 of those have multiple
distances based on a total 78000 estimates.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table5.dat 69 41 Mean estimate distances for 40 messier galaxies
table6.dat 173 11699 11699 individual galaxies each with multiple mean
distance estimates
--------------------------------------------------------------------------------
See also:
J/other/A+ARV/15.289 : Distances of local galaxies (Tammann+, 2008)
J/ApJ/748/15 : Galaxy distances with Fundamental Manifold (Zaritsky+, 2012)
J/ApJS/208/20 : Nine-year WMAP point source catalogs (Bennett+, 2013)
J/AJ/145/101 : Updated nearby galaxy catalog (Karachentsev+, 2013)
J/AJ/146/86 : Cosmicflows-2 catalog (Tully+, 2013)
J/ApJ/794/107 : Distance NGC6822 with Spitzer/FourStar Photometry (Rich+, 2014)
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/AJ/152/50 : Cosmicflows-3 catalog (CF3) (Tully+, 2016)
J/A+A/596/A14 : Group catalogues of the local universe (Saulder+, 2016)
J/MNRAS/487/2061 : Distances for 2062 nearby spiral galaxies (Hong+, 2019)
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 A11 --- MESSIER Galaxy, Messier ID
12- 12 A1 --- f_MESSIER Flag on ID (1)
14- 17 I4 --- NDist [13/2378] Number of Distances
19- 24 F6.3 Mpc MED2 [0.75/20.9] Mean Estimate Distance, Un-weighted
distance indicators
26- 30 F5.3 Mpc e_MED2 [0.04/4.3]Mean 1-Sigma Std. Dev, MED2
32- 37 F6.3 Mpc MED3 [0.75/20.9] Mean Estimate Distance,
Error-weighted distance indicators
39- 43 F5.3 Mpc e_MED3 [0.03/4.3] Mean 1-Sigma Std. Dev, MED3
45- 50 F6.3 Mpc MED4 [0.75/21.8] Mean Estimate Distance, Date-weighted
distance indicators
52- 56 F5.3 Mpc e_MED4 [0.03/4] Mean 1-Sigma Std. Dev, MED4
58- 63 F6.3 Mpc MED5 [0.76/20.6] Mean Estimate Distance, Selected
distances per indicator
65- 69 F5.3 Mpc e_MED5 [0.03/4] Mean 1-Sigma Std. Dev, MED5
--------------------------------------------------------------------------------
Note (1): Flags as follows:
a = Messier 102 ID as NGC5866 to be confirmed
b = Total/Mean, include the total number of observations and the mean
values of 40 values listed in each column of the table
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- Seq [1/11699] Sequential record number
7- 36 A30 --- Source Galaxy identification
38- 44 F7.3 deg GLON [0/360] Galactic longitude
46- 52 F7.3 deg GLAT [-90/90] Galactic latitude
54- 61 F8.6 --- z [0.0008/0.113] Redshift
63- 67 I5 km/s RVel [258/31973] Heliocentric radial velocity
69- 74 F6.1 --- BED1 [5/1038] Best Estimated Distance 1 Unweighted
Estimates
76- 80 F5.1 --- e_BED1 [0/438] 1-sigma uncertainty, BED1
82- 87 F6.1 --- BED2 [5/1038] Best Estimated Distance 2 Unweighted
Indicators
89- 93 F5.1 --- e_BED2 [0/438] 1-sigma uncertainty, BED2
95-100 F6.1 --- BED3 [0.7/1075] Best Estimated Distance 3 Error
Weighted Indicators
102-106 F5.1 --- e_BED3 [0/438] 1-sigma uncertainty, BED3
108-112 F5.1 --- BED4 [5/998] Best Estimated Distance 4 Date
Weighted Indicators
114-118 F5.1 --- e_BED4 [0/438] 1-sigma uncertainty, BED4
120-125 F6.1 --- BED5 [0.5/1075] Best Estimated Distance 5 Selected
Estimates
127-131 F5.1 --- e_BED5 [0/438] 1-sigma uncertainty, BED5
133-138 F6.1 --- BED6 [1.3/1038] Best Estimated Distance 6
Preference Weighted Indicators
140-144 F5.1 --- e_BED6 [0/438] 1-sigma uncertainty, BED6
146-150 F5.1 --- BED7 [5/990] Best Estimated Distance 7 Combined
Statistical Selected
152-156 F5.1 --- e_BED7 [0/438] 1-sigma uncertainty, BED7
158-160 I3 --- Nest [2/130] Total Number of Estimates
162-166 F5.1 km/s/Mpc H0 [6.8/908.4] Hubble Constant
168-173 I6 km/s Vpec [-19637/58938] Peculiar Velocity
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 13-Jan-2021