J/A+A/521/A8 Star-forming regions in NGC 2903 bar (Popping+, 2010)
Multiwavelength study of the star-formation in the bar of NGC 2903. Popping G., Perez I., Zurita A. <Astron. Astrophys., 521, A8-8 (2010)> =2010A&A...521A...8P
ADC_Keywords: Galaxies, photometry ; H II regions ; Ultraviolet ; Equivalent widths Keywords: galaxies: star formation - galaxies: structure - galaxies: individual: NGC 2903 - galaxies: evolution - HII regions - ultraviolet: galaxies Abstract: The nearby barred spiral NGC 2903 has an active starburst at its centre and HII regions distributed along its bar. We analyse the star-formation properties in the bar region of NGC 2903 and study its links to the typical bar morphological features. We combine space and ground-based data from the far-ultraviolet to the sub-millimeter spectral ranges to create a panchromatic view of the NGC 2903 bar. We produce two catalogues: one for the current star-formation regions, as traced by the Hα compact emission, and a second for the ultraviolet (UV) emitting knots, containing positions and luminosities. From them, we obtain ultraviolet colours, star-formation rates, dust attenuation, and Hα EWs, and analyse their spatial distribution. We estimate stellar cluster ages using stellar population synthesis models (Starburst99). Description: To investigate the extinction and the star-formation in the bar of NGC 2903 we used the Spitzer 24um observations from the Multiband Imaging Photometer (MIPS) instrument. To analyse the UV emission and its distribution in NGC 2903, we used GALEX mission data. Ground-based optical images from the Sloan Digital Sky Survey (SDSS) and a map of the CO (J=1-0) rotational transition emission were also used for the morphological analysis of NGC 2903. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 83 67 HII region catalogue of the bar zone of NGC 2903 table3.dat 86 56 Summary of positions and photometry of the star-forming knots
See also: J/MNRAS/396/2295 : Stellar cluster dynamical masses in NGC2903 (Hagele+, 2009) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 I2 --- HII [1/67] Sequential number of catalogued HII region, <[PPZ2010] HII NN> in Simbad 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 A1 --- DE- Declination sign (J2000) 17- 18 I2 deg DEd Declination (J2000) 20- 21 I2 arcmin DEm Declination (J2000) 23- 27 F5.2 arcsec DEs Declination (J2000) 29- 32 F4.2 arcsec Rad HII region radius 34- 37 F4.2 --- Ecc Eccentricity of the integration apertures 39- 41 I3 deg PA [-90/160] Position angle (measured North-West) of the integration apertures 43- 47 F5.2 [10-7W] logLHa Decimal logarithm of the Hα+[NII] luminosity (1) 49- 52 F4.2 [10-7W] e_logLHa rms uncertainty on logLHa 54- 57 F4.2 [0.1nm] logEW ?=- Decimal logarithm of the Hα+[NII] equivalent width (1) 59- 62 F4.2 [0.1nm] e_logEW ?=- rms uncertainty on logEW 64- 68 F5.2 [10-7W] logL24 Decimal logarithm of the 24um emission within the HII region apertures (1) 70- 73 F4.2 mag AHa Hα attenuation (see Sect. 4.3) (1) 75- 79 F5.1 mMsun/yr SFR Estimate of the current star-formation rate for each catalogued HII region (2) 81- 83 F3.1 mMsun/yr e_SFR rms uncertainty on SFR
Note (1): Include the corresponding correction for Galactic extinction (Schlegel et al. 1998ApJ...500..525S). Not corrected for internal dust extinction Note (2): The SFRs were obtained after applying a correction of 25% for [NII] contamination to the Hα luminosities and dust extinction as given in AHa.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Knot [1/56] ID of the region, <[PPZ2010] knot NN> in Simbad 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 A1 --- DE- Declination sign (J2000) 17- 18 I2 deg DEd Declination (J2000) 20- 21 I2 arcmin DEm Declination (J2000) 23- 27 F5.2 arcsec DEs Declination (J2000) 29 A1 --- l_logLHa Limit flag on logLHa (upper limit) 30- 34 F5.2 [10-7W] logLHa Decimal logarithm of the Hα luminosity (1) (2) 36 A1 --- l_logL24 Limit flag on logL24 (upper limit) 37- 41 F5.2 [10-7W] logL24 Decimal logarithm of the 24um luminosity (1) 43- 47 F5.2 [10-7W] logLFUV Decimal logarithm of the FUV luminosity (1) 49- 53 F5.2 [10-7W] logLNUV Decimal logarithm of the NUV luminosity (1) 55- 58 F4.2 mag AHa Estimated Hα attenuation (see Sect. 4.3) 60- 64 F5.2 mag FUV FUV attenuation-corrected magnitude 66- 70 F5.2 mag NUV NUV attenuation-corrected magnitude 72- 76 F5.2 mag F-N FUV-NUV colour index 78- 86 A9 --- HII ID number(s) of the HII region catalogue, which matches the UV emitting knot
Note (1): these values have not been corrected for extinction. Note (2): Hα luminosity corrected for a 25% [NII] contamination.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 29-May-2012
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