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J/AJ/113/905 HI observations of galaxies (Pantoja+ 1997)
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21-cm line observations of galaxies in the zone of avoidance.
Pantoja C.A., Altschuler D.R., Giovanardi C., Giovanelli R.
<Astron. J. 113, 905 (1997)>
=1997AJ....113..905P
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ADC_Keywords: Galaxies, spectra ; H I data ; Morphology
Abstract:
We present H I 21-cm line observations of 543 galaxies at low galactic
latitude in the Galactic Anticenter region of the Zone of Avoidance
(4h<={alpha}<=8h, 0{deg}=<{delta}=<37{deg}). The sample comprises 147
catalogued objects (from UGC, CGCG, MCG, and IRAS) still missing a
redshift measurement and a list of 369 objects selected from an
extensive optical compilation of galaxy candidates in this area. The
spectra were acquired using the 305-m Arecibo telescope and cover a
velocity range from -350 to +13800km/s at a resolution of about
16km/s. 196 galaxies were detected,59 of the catalogued ones and 137
from the optical compilation. The H I derived properties are
presented, as is a discussion regarding the redshift distribution in
this region. Our data seem to be consistent with a link across the
Zone of Avoidance between the Pisces-Perseus supercluster and
Abell 569.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 69 369 Sample of observed galaxies from the optical catalog
table2.dat 56 174 Sample of galaxies from other catalogs.
table3.dat 78 196 H I detected galaxies.
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See also:
J/ApJ/449/527 : Galaxies in the zone of avoidance (Lu+ 1995)
J/A+AS/110/269 : Galaxies in the "zone of avoidance". I. (Weinberger+, 1995)
J/A+AS/117/1 : Galaxies in the "zone of avoidance". II. (Seeberger+, 1996)
J/A+AS/117/369 : Galaxies in the "zone of avoidance". III. (Lercher+, 1996)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Galaxy name
8 A1 --- m_Name [abcde] Multiplicity index on Name
10- 11 I2 h RAh Right ascension (B1950.0)
13- 14 I2 min RAm Right ascension (B1950.0)
16- 19 F4.1 s RAs Right ascension (B1950.0)
21 A1 --- DE- Declination sign
22- 23 I2 deg DEd Declination (B1950.0)
25- 26 I2 arcmin DEm Declination (B1950.0)
28- 29 I2 arcsec DEs Declination (B1950.0)
31- 35 A5 --- POSS POSS E print in which the object was discovered
37- 39 F3.1 arcmin a Major axis
41- 43 F3.1 arcmin b Minor axis
45- 66 A22 ---- Com Comment regarding the quality and appearance
of the image
69 A1 --- HI [YN] Object detected in H I (Y: yes, N: no)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Galaxy name
13- 14 I2 h RAh Right ascension (B1950.0)
16- 17 I2 min RAm Right ascension (B1950.0)
19- 22 F4.1 s RAs Right ascension (B1950.0)
24 A1 --- DE- Declination sign
25- 26 I2 deg DEd Declination (B1950.0)
28- 29 I2 arcmin DEm Declination (B1950.0)
31- 34 F4.1 arcsec DEs Declination (B1950.0)
36- 45 A10 --- MType Morphological type
47- 49 F3.1 arcmin a ? Major axis
50 A1 --- --- [x]
51- 53 F3.1 arcmin b ? Minor axis
56 A1 --- HI [YN] Object detected in H I (Y: yes, N: no)
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Galaxy name
12 A1 --- n_Name [abcde*] Note on name (1)
14- 15 I2 h RAh Right ascension (B1950.0)
17- 18 I2 min RAm Right ascension (B1950.0)
20- 23 F4.1 s RAs Right ascension (B1950.0)
25 A1 --- DE- Declination sign
26- 27 I2 deg DEd Declination (B1950.0)
29- 30 I2 arcmin DEm Declination (B1950.0)
32- 33 I2 arcsec DEs Declination (B1950.0)
35- 39 I5 km/s HVel HI-derived systemic heliocentric velocity
41- 42 I2 km/s e_HVel rms uncertainty on HVel
44- 48 F5.2 Jy.km/s SHI HI line flux
50- 53 F4.2 Jy.km/s e_SHI rms uncertainty on SHI
56- 58 I3 km/s W50 Line width measured at 50% of the peak
level on each side of the profile
60- 61 I2 km/s e_W50 rms uncertainty on W50
63- 67 F5.1 mJy SHIp Peak flux density of the HI feature
70- 72 F3.1 mJy rms rms noise of the baselined spectrum
measured outside the detected feature
75- 78 F4.2 10+10solMass MHI HI mass
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Note (1):
a : At this position lies a bright star, SAO 076738. It is a region
with many absorption nebulae (b~-10{deg}) with a diffuse object
northeast of this IRAS source.
b : This is a galaxy located below the galactic plane at b~-5{deg} in
a region with many absorption nebulae. It has a very faint image
on the E print (it is not see on the O) and corresponds to the
object with the largest H I mass in our sample
(M_HI_=5.8x10^10^M_{sun}_).
c : Possibly part of an interacting system based on the H I profile
and on the neighborhood of other galaxies.
d : The negative feature in the profile is probably another galaxy
detected in the off scan but no obvious counterpart was found
in the POSS prints.
e : Pair of galaxies.
* : indicates corrections vs the original publication (suggested by
H. Andernach) and concerns the sources:
0653+06 (0653+16 in the original publication)
+02-18-008 (+02-18-08 in the original publication)
0617+06 (0622+07 in the original publication)
These corrections were effectively done on 28-May-1998
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History:
* October 1997: Prepared via OCR at CDS.
* 28-May-1998: thanks to verifications done by H. Andernach
(heinz@astro.ugto.mx) a few typographical errors were corrected;
the modifications indicated at the end of the Note (1) above
have also been made following H. Andernach's suggestions.
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(End) James Marcout, Patricia Bauer [CDS] 02-Oct-1997