J/MNRAS/443/2634 AGES HI sources in NGC 7448 field (Taylor+, 2014)
The Arecibo Galaxy Environment Survey.
VII. A dense filament with extremely long HI streams.
Taylor R., Minchin R.F., Herbst H., Davies J.I., Rodriguez R., Vazquez C.
<Mon. Not. R. Astron. Soc., 443, 2634-2649 (2014)>
=2014MNRAS.443.2634T 2014MNRAS.443.2634T
ADC_Keywords: Galaxies, nearby ; H I data
Keywords: galaxies: evolution - galaxies: interactions
Abstract:
We present completed observations of the NGC 7448 galaxy group and
background volume as part of the blind neutral hydrogen Arecibo Galaxy
Environment Survey. Our observations cover a region spanning
5°x4°, over a redshift range of approximately
-2000<cz<20000km/s. A total of 334 objects are detected, mostly in
three overdensities at cz∼7500, cz∼9600 and cz∼11400km/s. The galaxy
density is extremely high (15deg-2) and many (∼24%) show
signs of extended HI emission, including some features as much as
800kpc in projected length. We describe the overall characteristics of
this environment: kinematics, typical galaxy colours and mass-to-light
ratios, and substructure. To aid in the cataloguing of this data set,
we present a new fits viewer (FRELLED: fits Realtime Explorer of Low
Latency in Every Dimension). This incorporates interactive source
cataloguing tools which increase our source extraction speed by
approximately a factor of 50.
Description:
Observations of this field began in June 2008 and were completed in
November 2011, using the 7-beam ALFA (Arecibo L-band Feed Array)
instrument on the Arecibo telescope in spectral line mode. The field
observed to full depth spans 5 degrees of R.A. by 4 degrees of
declination centred on NGC 7448. Due to ALFA.s hexagonal beam
arrangement, a small area outside this range is also included at a
lower sensitivity. The full spatial range of the data considered here
is from 22:49:00 to 23:10:50 in R.A, and from +13:51:00 to +18:06:00
in declination.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 173 334 AGES HI data for the NGC 7448 field
table2.dat 85 209 Optical data of AGES HI detections in the
NGC 7448 field
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See also:
J/MNRAS/383/1519 : Abell 1367 HI sources from AGES (Cortese+, 2008)
J/AJ/140/1093 : AGES NGC7332/7339 & NGC 1156 HI sources (Minchin+, 2010)
J/MNRAS/415/1883 : AGES HI sources in NGC 7448 (Davies+, 2011)
J/MNRAS/423/787 : AGES sources in Virgo cluster (Taylor+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Jname Source designation, JHHMMSS+DDMMSS
16- 25 A10 --- Name Our catalogue ID,
AF7448_NNN or AK7448_NNN (G1)
26- 27 A2 --- n_Name [* X] Problematic or extended source (G1)
29- 30 I2 h RAh Right ascension (J2000)
32- 33 I2 min RAm Right ascension (J2000)
35- 38 F4.1 s RAs Right ascension (J2000)
40- 49 F10.6 deg RAdeg Right ascension (J2000)
53- 55 F3.1 s e_RAs Error in RA
56 A1 --- DE- Declination sign (J2000)
57- 58 I2 deg DEd Declination (J2000)
60- 61 I2 arcmin DEm Declination (J2000)
63- 64 I2 arcsec DEs Declination (J2000)
66- 74 F9.6 deg DEdeg Declination (J2000)
76- 77 I2 arcsec e_DEs Error in DE (J2000)
79- 83 I5 km/s HV [363/19015] Heliocentric velocity,
optical reference frame
85- 86 I2 km/s e_HV [0/17] Error in HV
88- 90 I3 km/s W50 [25/526] Width at 50% of the peak peak
92- 93 I2 km/s e_W50 [0/34] Error in W50
95- 97 I3 km/s W20 [37/594] Width at 20% of the peak
99-100 I2 km/s e_W20 [0/50] Error in W20
102-106 F5.1 Jy Fp [2/121] Peak flux
108-110 F3.1 Jy e_Fp [0.4/6.1] Error on Fp
112-117 F6.3 Jy.km/s Ft [0.1/24] Total flux, assuming a point source
119-123 F5.3 Jy.km/s e_Ft [0.03/1.1] Error in Ft
126-130 F5.2 [Msun] MHI [6.5/10.6] Estimated MHI (log scale),
assuming d=v/H0 with H0=71km/s/Mpc
131-136 F6.2 --- S/Np [3.6/242] Peak S/N
138-143 F6.2 --- S/Nt [1.4/131] Total S/N
145-147 F3.1 mJy rms [0.4/5.9] rms noise
149-152 A4 --- Opt Status of optical counterpart (2)
154-159 I6 km/s Vopt ? Optical velocity measurement from NED or
the SDSS (3)
161-173 A13 --- OptName Name of the optical counterpart in major
catalogue
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Note (2): status as follows:
0 = the counterpart has a matching optical redshift
1 = no optical redshift measurement is available
A = other candidates are also present with matching optical redshift
B = other candidates do not have optical redshift measurements
3 = the optical counterpart cannot be accurately determined/measured due to
the presence of a foreground star or problems with the optical data
Note (3): Where multiple measurements are available, an average value is given
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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- 10 A10 --- Name ID in our catalogue (G1)
11 A1 --- n_Name [*] Problematic source (G1)
13- 14 I2 h RAh SDSS optical counterpart Right ascension (J2000)
16- 17 I2 min RAm SDSS optical counterpart Right ascension (J2000)
19- 23 F5.2 s RAs SDSS optical counterpart Right ascension (J2000)
25 A1 --- DE- SDSS optical counterpart Declination sign (J2000)
26- 27 I2 deg DEd SDSS optical counterpart Declination (J2000)
29- 30 I2 arcmin DEm SDSS optical counterpart Declination (J2000)
32- 35 F4.1 arcsec DEs SDSS optical counterpart Declination (J2000)
37 A1 --- Mt [SIEMPU] Morphological type (1)
39- 42 F4.2 arcmin Sep [0/2.6] Separation of HI center and
optical counterpart
44- 48 F5.2 mag gmag Apparent g magnitude, corrected for extinction
50- 54 F5.2 mag imag Apparent i magnitude, corrected for extinction
56- 61 F6.2 mag gMAG Absolute g magnitude, corrected for extinction
63- 68 F6.2 mag iMAG Absolute i magnitude, corrected for extinction
70- 74 F5.2 mag g-i g-i colour index corrected for extinction
76- 79 F4.2 Sun MHI/Lg [0.03/4.2] HI mass-to-light ratio (g band)
81- 85 F5.2 kpc Dopt [0.9/90] Optical diameter in kpc
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Note (1): Morphological type as follows:
S = Spiral galaxy
I = Irregular galaxy
E = Elliptical galaxy
M = merger
P = peculiar galaxy
U = unknown
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Global notes:
Note (G1): The acronymn comprises the survey (AGES), the discovery and/or
cataloguing technique (F - FRELLED, K - kvis) and the survey field (NGC 7448).
An asterisk indicates the position fitting in mbspect failed; measurements
should be considered very uncertain in these cases.
An X indicates the HI source may be extended.
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History:
From electronic version of the journal
References:
Auld et al., Paper I 2006MNRAS.371.1617A 2006MNRAS.371.1617A
Cortese et al., Paper II 2008MNRAS.383.1519C 2008MNRAS.383.1519C, Cat. J/MNRAS/383/1519
Minchin et al., Paper III 2010AJ....140.1093M 2010AJ....140.1093M, Cat. J/AJ/140/1093
Davies et al., Paper IV 2011MNRAS.415.1883D 2011MNRAS.415.1883D, Cat. J/MNRAS/415/1883
Taylor et al., Paper V 2012MNRAS.423..787T 2012MNRAS.423..787T, Cat. J/MNRAS/423/787
Taylor et al., Paper VI 2013MNRAS.428..459T 2013MNRAS.428..459T
Taylor et al., Paper VIII 2014MNRAS.442L..46T 2014MNRAS.442L..46T
(End) Patricia Vannier [CDS] 16-Apr-2015