J/A+A/419/563 Planetary nebulae near the Galactic Center (Jacoby+, 2004)
Planetary nebulae near the Galactic Center: Identifications.
Jacoby G.H., Van De Steene G.
<Astron. Astrophys., 419, 563-582 (2004)>
=2004A&A...419..563J 2004A&A...419..563J
ADC_Keywords: Planetary nebulae ; Spectroscopy
Keywords: ISM: planetary nebulae: general - Galaxy: bulge -
methods: observational
Abstract:
We surveyed the central 4x4 degrees of the Galactic center for
planetary nebulae in the light of [S III] λ9532 and found 94
PNe that were not previously known, plus 3 that were previously
identified as possible candidates. For 63 of these 97 objects, we
obtained spectra that are consistent with highly reddened PN while the
other 34 could not be recovered spectroscopically and remain
unverified. Of the 94 candidates, 54 and 57 were detected via radio at
3 and 6cm, respectively. An additional 20 PNe candidates were found
during follow-up Hα imaging but have not yet been verified
spectroscopically. Based on the properties of IRAS sources in this
region of the Galaxy, and on the total luminosity of the Galactic
bulge, the expected number of PNe is 250, only 50% more than the 160
PNe candidates now known. Thus, surveys for PNe in the bulge are
approximately two-thirds complete with the remainder likely hidden
behind dust.
Description:
We carried out the survey of the central 4x4degrees using the Case
Western Reserve University (CWRU) Burrell Schmidt telescope on Kitt
Peak in August 1994 and July 1995.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 69 97 Properties of new Galactic bulge PNe
table3.dat 37 20 Optical positions and Hα fluxes for PNe
discovered in Hα survey
table1.dat 32 16 Field centers for the near-IR PN survey
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See also:
J/A+AS/126/297 : Abundances of PN near Galactic centre (Ratag+ 1997)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- JaSt JaSt number
4- 5 I2 h RAh Right ascension (J2000.0)
7- 8 I2 min RAm Right ascension (J2000.0)
10- 14 F5.2 s RAs Right ascension (J2000.0)
16 A1 --- DE- Declination sign (J2000.0)
17- 18 I2 deg DEd Declination (J2000.0)
20- 21 I2 arcmin DEm Declination (J2000.0)
23- 27 F5.2 arcsec DEs Declination (J2000.0)
29- 30 I2 arcsec Diam ? Diameter (1)
32- 37 F6.2 [mW/m2] logF(Ha+[NII]) ? log of Hα+[NII] flux (2)
38 A1 --- u_logF(Ha+[NII]) Uncertainty flag on logF(Ha+[NII])
40- 44 F5.3 --- FHa/F(Ha+[NII]) ? Flux ratio,
F(Hα)/F(Hα+[NII]) (3)
45 A1 ---- u_FHa/F(Ha+[NII]) Uncertainty flag on FHa/F(Ha+[NII])
47- 51 F5.2 mJy F6cm ? Flux at 6cm (4)
52 A1 --- u_F6cm Uncertainty flag on F6cm
54- 68 A15 --- Name Name of the PN or
IRAS close coincidence (5)
69 A1 --- u_Name [?] Uncertaitny flag on IRAS close
coincidence (5)
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Note (1): Diameters are taken from the Hα images when possible.
Due to poor resolution, the [SIII] diameters are uncertain; those less
than 5" are indicated by "--".
Note (2): Entries of 0.00 indicate that the PN was not recovered in the
Hα imaging. Blank entries indicate that the PN was not within
the Hα imaging survey area. Entries with ":" have large
uncertainties due to contamination from the residuals of stars,
or due to the faintness of the nebula.
Note (3): Entries of "--" indicate that the Hα line could not be
measured in our spectra. Blank entries indicate that no spectrum
was obtained and therefore the PN has not been confirmed
spectroscopically. Entries with ":" are uncertain due to weak [NII]
lines in the spectrum. Spectra were obtained either at the ESO/La
Silla 1.5-m or CTIO 4-m telescopes.
Note (4): Radio fluxes were obtained at the Australia Telescope Compact Array
and are reported in Van de Steene & Jacoby (2001, Cat. J/A+A/373/536).
Note (5): K-series entries are candidates initially suspected by Kohoutek
(Kohoutek, 1994AN....315..235K 1994AN....315..235K) Close coincidences (<10") with IRAS
sources are indicated; 2 IRAS coincidences with somewhat larger
separations (10-15") are shown with "?".
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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- 2 I2 --- JaSt2 JaSt2 number
3 A1 --- n_JaSt2 [bc] Note on JaSt2 (1)
5- 6 I2 h RAh Right ascension (J2000.0)
8- 9 I2 min RAm Right ascension (J2000.0)
11- 14 F4.1 s RAs Right ascension (J2000.0)
16 A1 --- DE- Declination sign (J2000.0)
17- 18 I2 deg DEd Declination (J2000.0)
20- 21 I2 arcmin DEm Declination (J2000.0)
23- 26 F4.1 arcsec DEs Declination (J2000.0)
29- 30 I2 arcsec Diam Diameter
32- 37 F6.2 [mW/m2] logF(Ha+[NII]) Flux of Hα+[NII] (2)
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Note (1): Individual notes use the following abbreviations:
b = Large, possibly bi-polar
c = Unusually bright knot just off-center; possibly coincident with
IRAS 17468-2932 and 1RXS J175001.8-293316.
Note (2): Entries all have very large uncertainties because of the degree
of crowding from stars over the large diameters of these nebulae.
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Field Field number
4- 5 I2 h RAh Right ascension (J2000)
7- 8 I2 min RAm Right ascension (J2000)
10- 11 I2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000)
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 21 I2 arcsec DEs Declination (J2000)
23- 32 A10 "DD/MM/YYYY" Date UT Date
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Jun-2005