J/AJ/116/2805 J/AJ/116/2805 H II regions in spiral galaxies L Van Zee J J Salzer M P Haynes A A O'Donoghue T J Balonek Astron. J. 116 2805 1998 1998AJ....116.2805V VII/118 : NGC 2000.0 (Sky Publishing, ed. Sinnott 1988) Abundances Galaxies, optical H II regions galaxies: abundances galaxies: ISM galaxies: spiral We present the results of low-dispersion optical spectroscopy of 186 HII regions spanning a range of radius in 13 spiral galaxies. Abundances for several elements (oxygen, nitrogen, neon, sulfur, and argon) were determined for 185 of the HII regions. As expected, low metallicities were found for the outlying HII regions of these spiral galaxies. Radial abundance gradients were derived for the 11 primary galaxies; similar to results for other spiral galaxies, the derived abundance gradients are typically -0.04 to -0.07dex/kpc.

NGC/IC NGC or IC (Cat. <VII/118>) galaxy designation --- RAh Right ascension (J2000.0) h RAm Right ascension (J2000.0) min RAs Right ascension (J2000.0) s DE- Declination sign (J2000.0) --- DEd Declination (J2000.0) deg DEm Declination (J2000.0) arcmin DEs Declination (J2000.0) arcsec MType Morphological type from RC3 (Cat. <VII/155>) --- Dist Distance Mpc BMAG Absolute B magnitude mag i Inclination from the RC3 (Cat. <VII/155>) deg PA Position angle from RC3 (Cat. <VII/155>) deg R25 Isophotal radius from RC3 (Cat. <VII/155>) arcsec Rad Radius arcsec NHII Number of H II regions --- NGC/IC NGC or IC (Cat. <VII/118>) galaxy designation --- Slit Slit number --- [VSH98] HII region designation in the galaxy (+XXX+YYY) number=1 [VSH98] NGC NNNN +XXX+YYY, [VSH98] IC NNNN +XXX+YYY in Simbad +XXX east-west offset from the galaxy center in arcsec, east positive +YYY north-south offset from the galaxy center in arcsec, north positive --- RAh Right ascension (J2000.0) h RAm Right ascension (J2000.0) min RAs Right ascension (J2000.0) s DE- Declination sign (J2000.0) --- DEd Declination (J2000.0) deg DEm Declination (J2000.0) arcmin DEs Declination (J2000.0) arcsec PA Position angle deg Run Run identification --- Nexp Number of exposures --- --- --- Tint Integration time s NGC/IC NGC or IC (Cat. <VII/118>) galaxy designation --- [VSH98] HII region designation in the galaxy (+XXX+YYY) number=1 [VSH98] NGC NNNN +XXX+YYY, [VSH98] IC NNNN +XXX+YYY in Simbad +XXX east-west offset from the galaxy center in arcsec, east positive +YYY north-south offset from the galaxy center in arcsec, north positive --- Slit Slit number --- [OII] Relative [O II]3727+3729 line strength number=2 line strength relative to H{beta} --- e_[OII] rms uncertainty on [OII] --- [NeIII] Relative [Ne III] 3869 line strength number=2 line strength relative to H{beta} --- e_[NeIII] rms uncertainty on [NeIII] --- [OIII] Relative [O III] 4959+5007 line strength number=2 line strength relative to H{beta} --- e_[OIII] rms uncertainty on [OIII] --- n_[OIII] *: only {lambda}5007 detected (sum derived assuming {lambda}5007/{lambda}4959=2.88) --- [OI] Relative [O I] 6300 line strength number=2 line strength relative to H{beta} --- e_[OI] rms uncertainty on [OI] --- [SIII] Relative [S III] 6312 line strength number=2 line strength relative to H{beta} --- e_[SIII] rms uncertainty on [SIII] --- Halpha Relative H{alpha} 6563 line strength number=2 line strength relative to H{beta} --- e_Halpha rms uncertainty on Halpha --- [NII] Relative [N II] 6548+6583 line strength number=2 line strength relative to H{beta} --- e_[NII] rms uncertainty on [NII] --- [SII] Relative [S II] 6717+6731 line strength number=2 line strength relative to H{beta} --- e_[SII] rms uncertainty on [SII] --- [ArIII] Relative [Ar III] 7136 line strength number=2 line strength relative to H{beta} --- e_[ArIII] rms uncertainty on [ArIII] --- cHbeta Reddening coefficient c_H{beta}_ --- e_cHbeta rms uncertainty on cHbeta --- EWHbeta Hbeta equivalent width 0.1nm NGC/IC NGC or IC (Cat. <VII/118>) galaxy designation --- [VSH98] HII region designation in the galaxy number=1 [VSH98] NGC NNNN +XXX+YYY, [VSH98] IC NNNN +XXX+YYY in Simbad +XXX east-west offset from the galaxy center in arcsec, east positive +YYY north-south offset from the galaxy center in arcsec, north positive --- Rad Radius ? Deprojected radius arcsec Slit Slit number --- [OIII] Line ratio [O III]4959,5007/4363 --- e_[OIII] rms uncertainty on [O III] --- [SII] Line ratio [S II]6717/6731 --- e_[SII] rms uncertainty on [S II] --- log([OII]+[OIII]) log([O II]+[O III]) --- e_log([OII]+[OIII]) rms uncertainty on log([OII]+[OIII]) --- log([OIII]/[OII]) log([O III]/[O II]) --- e_log([OIII]/[OII]) rms uncertainty on log([OIII]/[OII]) --- log([NII]/Ha) log([N II]/H{alpha}) --- e_log([NII]/Ha) rms uncertainty on log([NII]/Ha) --- log([NII]/[OII]) log([N II]/[O II]) --- e_log([NII]/[OII]) rms uncertainty on log([NII]/[OII]) --- log([SII]/[OII]) log([S II]/[O II]) --- e_log([SII]/[OII]) rms uncertainty on log([SII]/[OII]) --- NGC/IC NGC or IC (Cat. <VII/118>) galaxy designation --- [VSH98] HII region designation in the galaxy number=1 [VSH98] NGC NNNN +XXX+YYY, [VSH98] IC NNNN +XXX+YYY in Simbad +XXX east-west offset from the galaxy center in arcsec, east positive +YYY north-south offset from the galaxy center in arcsec, north positive --- Rad Deprojected radius arcsec Slit Slit number --- T(O++) Temperature from O++ K e_T(O++) rms uncertainty on T(O++) number=2 For NGC 4395 +088-119, T(O++)=8930^+5790^_-1200_K K 12+log(O/H) 12+log(O/H abundance --- e_12+log(O/H) rms uncertainty on 12+log(O/H) --- log(N/O) log(N/O) abundance ratio --- e_log(N/O) rms uncertainty on log(N/O) --- log(Ne/O) log(Ne/O) abundance ratio --- e_log(Ne/O) rms uncertainty on log(Ne/O) --- log(S/O) log(S/O) abundance ratio --- e_log(S/O) rms uncertainty on log(S/O) --- log(Ar/O) log(Ar/O) abundance ratio --- e_log(Ar/O) rms uncertainty on log(Ar/O) --- O/Hzkh Zaritsky et al. (1994ApJ...420...87Z) (O/H) abundance ratio --- O/Hep84 Edmunds & Pagel (1984MNRAS.211..507E) (O/H) abundance ratio --- NGC NGC (Cat. <VII/118>) galaxy designation --- NHII Number of HII regions --- 12+log(O/H) Central 12+log(O/H) abundance --- e_12+log(O/H) rms uncertainty on 12+log(O/H) --- Gradient1 Gradient in dex/r_25_ --- e_Gradient1 rms uncertainty on Gradient1 --- Gradient2 Gradient in dex/r_d_ --- e_Gradient2 rms uncertainty on Gradient2 --- Gradient3 Gradient in dex/kpc --- e_Gradient3 rms uncertainty on Gradient3 --- James Marcout, Patricia Bauer CDS 1999Feb04 UNKNOWN UNKNOWN From AJ electronic version J_AJ_116_2805.xml