J/PAZh/33/577 New dwarf galaxies in northern groups (Karachentsev+, 2007)
New probable dwarf galaxies in northern groups of the Local Supercluster.
Karachentsev I.D., Karachentseva V.E., Huchtmeier W.K.
<Pis'ma Astron. Zh. 33, 577 (2007)>
=2007PAZh...33..577K 2007PAZh...33..577K
=2007AstL...33..512K 2007AstL...33..512K
ADC_Keywords: Galaxies, nearby ; Morphology
Keywords: dwarf galaxies - groups of galaxies
Abstract:
We have searched for nearby dwarf galaxies in 27 northern groups with
characteristic distances 8-15Mpc based on the Second Palomar Sky
Survey prints. In a total area of about 2000 square degrees, we have
found 90 low-surface-brightness objects, more than 60% of which are
absent from known catalogs and lists. We have classified most of these
objects (80%) as irregular dwarf systems. The first 21-cm line
observations of the new objects with the 100-m Effelsberg radio
telescope showed that the typical linear diameters (1-2kpc), internal
motions (30km/s), and hydrogen masses (2x107M☉) of the new
galaxies correspond to those expected for the dwarf population of
nearby groups.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
-----------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 53 27 Groups in which dwarf galaxies were searched
table2.dat 84 90 List of the new galaxies found in 27 nearby
northern groups
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Group NGC number of dominating galaxy in the group
11- 14 I4 km/s VLG Mean radial velocity
17- 18 I2 --- Nm Number of group members with known radial
velocities
21 I1 --- Nel Number of elliptical galaxies among them
24- 25 I2 --- MType Morphological type of dominating galaxy on the
RC3 scale (1)
28- 45 A18 --- POSS Numbers of the POSS-II fields in which
searches were constructed
48- 49 I2 --- Nob Number of detected possible dwarf members of
group without radial velocities
52- 53 I2 --- Nnew Number of new objects
--------------------------------------------------------------------------------
Note (1): by de Vaucouleurs et al., 1991, Cat. VII/155.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- [KKH2007] Galaxy name (dJHHMM+DDMM) (1)
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 21 F4.1 s RAs Right ascension (J2000)
23 A1 --- DE- Declination sign (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 31 I2 arcsec DEs Declination (J2000)
33- 35 A3 --- MType Morphological type
37- 40 F4.2 arcmin amaj Major axis measured on the blue print
41 A1 --- u_amaj Uncertainty flag on amaj
44- 47 F4.2 arcmin bmaj Minor axis measured on the blue print
48 A1 --- u_bmaj Uncertainty flag on bmaj
50- 57 A8 --- Group Group name (NGC NNNN)
59- 84 A26 --- Notes Notes
--------------------------------------------------------------------------------
Note (1): "d" stands for "dwarf" followed by two four-digit sequences
indicating the hours and minutes in right ascension and the degrees
and minutes in declination (J2000)
--------------------------------------------------------------------------------
History:
* 29-Jan-2008: From electronic version of the journal
* 03-Apr-2008: table1 added (from Veta Avedisova)
(End) Veta Avedisova [INASAN], Patricia Vannier [CDS] 29-Jan-2008