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J/ApJ/462/1 PNe in the Coma I region (Jacoby+ 1996)
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Planetary nebulae as standard candles. X. Tests in the Coma I region.
Jacoby G.H., Ciardullo R., Harris W.E.
<Astrophys. J. 462, 1 (1996)>
=1996ApJ...462....1J (SIMBAD/NED BibCode)
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ADC_Keywords: Nebulae, planetary
Keywords: distance scale - galaxies: clusters: individual (Coma I)-
galaxies: distances and redshifts - planetary nebulae: general
Abstract:
We present the result of an [OIII]500.7nm survey for planetary
nebulae (PNe) in three galaxies of the Coma I group: NGC 4278 (Hubble
type E1), NGC 4494 (E1), and NGC 4565 (edge-on Sb). Using the
planetary nebula luminosity function (PNLF), we derived distances to
NGC 4494 (12.8+/-0.9Mpc), NGC 4564 (10.5^+0.8^_-1.0_Mpc), and NGC 4278
(10.2^+0.7^_-1.0_Mpc). The larger distance for NGC 4494 is significant
beyond the 99% confidence level when the common systematic errors in
all three distances are removed. This agrees with the results of the
globular cluster luminosity function and surface brightness
fluctuation methods, both of which place NGC 4565 in front of
NGC 4494. The large separation is also consistent with the results of
Virgocentric flow models, which predict triple-valued solutions to the
Hubble flow in that direction.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 45 39 NGC 4278 planetary nebulae
table3 40 183 NGC 4494 planetary nebulae
table4 38 35 NGC 4565 planetary nebulae
table6 33 46 Astrometric reference stars
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Byte-by-byte Description of file: table2 table3
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Bytes Format Units Label Explanations
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1- 3 I3 --- ID ID number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17- 18 I2 deg DEd Declination (J2000)
20- 21 I2 arcmin DEm Declination (J2000)
23- 26 F4.1 arcsec DEs Declination (J2000)
28- 30 F3.1 arcmin Rad Isophotal radius from galaxy
32- 36 F5.2 mag m5007 Lambda5007 magnitude (m5007=-2.5logF5007 - 13.74)
38- 45 A8 --- Note Note (1)
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Note (1): S when PNe that are part of the statistical samples
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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1- 2 I2 --- ID ID number
4- 5 I2 h RAh Right ascension (J2000)
7- 8 I2 min RAm Right ascension (J2000)
10- 14 F5.2 s RAs Right ascension (J2000)
16- 17 I2 deg DEd Declination (J2000)
19- 20 I2 arcmin DEm Declination (J2000)
22- 25 F4.1 arcsec DEs Declination (J2000)
27- 29 I3 arcsec z PN distance from galactic plane
31- 35 F5.2 mag m5007 Lambda5007 magnitude (m5007=-2.5logF5007 - 13.74)
37 A1 --- Note [S] S when PNe that are part of the statistical
samples
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Byte-by-byte Description of file: table6
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
10 A1 --- ID Star identification
12- 13 I2 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 22 F5.2 s RAs Right ascension (J2000)
24- 25 I2 deg DEd Declination (J2000)
27- 28 I2 arcmin DEm Declination (J2000)
30- 33 F4.1 arcsec DEs Declination (J2000)
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Courtesy: Robin Ciardullo <rbc@astro.psu.edu>
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(End) Patricia Bauer [CDS] 06-Sep-1996