J/ApJS/191/160 3D spectroscopy in 30 Dor (Pellegrini+, 2010) ================================================================================ Structure and feedback in 30 Doradus. I. Observations. Pellegrini E.W., Baldwin J.A., Ferland G.J. =2010ApJS..191..160P ================================================================================ ADC_Keywords: Interstellar medium ; Spectroscopy Keywords: H II regions - ISM: individual objects (30 Doradus) - ISM: structure - surveys - techniques: spectroscopic Abstract: We have completed a new optical imaging and spectrophotometric survey of a 140x80pc^2^ region of 30 Doradus centered on R136, covering key optical diagnostic emission lines including H{alpha}, H{beta}, H{gamma}, [OIII]4363, 4959, 5007, [NII]6548, 6584, [SII]6717, 6731 [SIII]6312, and in some locations [SIII]9069. We present maps of fluxes and intensity ratios for these lines, and catalogs of isolated ionizing stars, elephant-trunk pillars, and edge-on ionization fronts. The final science-quality spectroscopic data products are available to the public. Our analysis of the new data finds that, while stellar winds and supernovae undoubtedly produce shocks and are responsible for shaping the nebula, there are no global spectral signatures to indicate that shocks are currently an important source of ionization. We conclude that the considerable region covered by our survey is well described by photoionization from the central cluster where the ionizing continuum is dominated by the most massive O stars. We show that if 30 Dor were viewed at a cosmological distance, its integrated light would be dominated by its extensive regions of lower surface brightness rather than by the bright, eye-catching arcs. Description: In 2008 February, we obtained a grid of long-slit spectra of 30 Dor using the RC spectrograph on the 4m Blanco telescope at Cerro Tololo Inter-American Observatory (CTIO). The spectrograph slit was 5 arcmin in length, and was positioned at a total of 37 different locations spanning the nebula (Figure 1(b)). Table 2 lists for each slit position the identifying position number, the R.A. and decl. of the slit center in J2000 coordinates, the P.A., and the total exposure time. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 35 35 Summary of Blanco spectroscopic observations of 30 Doradus table4.dat 347 4238 Sample of Blanco spectroscopy data cube -------------------------------------------------------------------------------- See also: J/A+A/341/98 : The ionizing cluster of 30 Doradus. I. (Selman+ 1999) J/ApJ/466/254 : NIR Imaging of R136 in 30 Dor (Brandl+ 1996) Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- Pos Slit position number 4- 5 I2 h RAh Slit center hour of right ascension (J2000) 7- 8 I2 min RAm Slit center minute of right ascension (J2000) 10- 14 F5.2 s RAs Slit center second of right ascension (J2000) 16 A1 --- DE- Slit center declination sign (J2000) 17- 18 I2 deg DEd Slit center degree of declination (J2000) 20- 21 I2 arcmin DEm Slit center arcminute of declination (J2000) 23- 27 F5.2 arcsec DEs Slit center arcsecond of declination (J2000) 29- 31 I3 deg PA Position angle (E of N) 33- 35 I3 s ExpT Total integrated exposure time -------------------------------------------------------------------------------- Byte-by-byte Description of file: table4.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 2 I2 --- Pos Slit position number 4- 10 F7.2 arcsec oRA Right Ascension offset from R136 (1) 12- 18 F7.2 arcsec oDE Declination offset from R136 (1) 20- 22 I3 --- Row Extraction window central pixel row 24- 28 F5.2 [cm-3] logne Log of the electron density 30- 33 F4.2 [cm-3] e_logne Lower 1{sigma} limit uncertainty in logne 35- 38 F4.2 [cm-3] E_logne Upper 1{sigma} limit uncertainty in logne 40- 47 E8.3 K TO3 ? Electron temperature from [OIII] 49- 56 E8.3 K e_TO3 ? Lower 1{sigma} limit uncertainty in TO3 58- 65 E8.3 K E_TO3 ? Upper 1{sigma} limit uncertainty in TO3 67- 71 F5.2 mag AV V band extinction from H{alpha}/H{beta} 73- 81 E9.2 mW/m2/arcsec2 FHb Integrated H{beta} surface brightness (2) 83- 91 E9.2 mW/m2/arcsec2 IHb Dereddened H{beta} surface brightness (2) 93-101 E9.2 mW/m2/arcsec2 e_IHb The 1{sigma} uncertainty in IHb (2) 103-109 F7.2 --- I4341 Dereddened HI 4341 surface brightness (3) 111-115 F5.2 --- e_I4341 The 1{sigma} uncertainty in I4341 (3) 117-122 F6.2 --- I4363 Dereddened [OIII]4363 surface brightness (3) 124-128 F5.2 --- e_I4363 The 1{sigma} uncertainty in I4363 (3) 130-135 F6.2 --- I4471 Dereddened HeI 4471 surface brightness (3) 137-141 F5.2 --- e_I4471 The 1{sigma} uncertainty in I4471 (3) 143-150 F8.2 --- I4800 Dereddened Continuum 4800 surface brightness (3) 152-155 F4.2 --- e_I4800 The 1{sigma} uncertainty in I4800 (3) 157-162 F6.2 --- I4963 Dereddened [OIII]4963 surface brightness (3) 164-167 F4.2 --- e_I4963 The 1{sigma} uncertainty in I4963 (3) 169-175 F7.2 --- I5007 Dereddened [OIII]5007 surface brightness (3) 177-180 F4.2 --- e_I5007 The 1{sigma} uncertainty in I5007 (3) 182-188 F7.2 --- I5625 Dereddened Continuum 5625 surface brightness (3) 190-193 F4.2 --- e_I5625 The 1{sigma} uncertainty in I5625 (3) 195-199 F5.2 --- I5876 Dereddened HeI 5876 surface brightness (3) 201-204 F4.2 --- e_I5876 The 1{sigma} uncertainty in I5876 (3) 206-211 F6.2 --- I6300 Dereddened [OI]6300 surface brightness (3) 213-216 F4.2 --- e_I6300 The 1{sigma} uncertainty in I6300 (3) 218-223 F6.2 --- I6302 Dereddened [OI] NS+Neb. 6302 surface brightness (3) 225-228 F4.2 --- e_I6302 The 1{sigma} uncertainty in I6302 (3) 230-234 F5.2 --- I6318 Dereddened [SIII]6318 surface brightness (3) 236-239 F4.2 --- e_I6318 The 1{sigma} uncertainty in I6318 (3) 241-245 F5.2 --- I6364 Dereddened [OI]6364 surface brightness (3) 247-250 F4.2 --- e_I6364 The 1{sigma} uncertainty in I6364 (3) 252-257 F6.2 --- I6552 Dereddened [NII]6552 surface brightness (3) 259-262 F4.2 --- e_I6552 The 1{sigma} uncertainty in I6552 (3) 264-269 F6.2 --- I6570 Dereddened H{alpha}6570 surface brightness(3) 271-274 F4.2 --- e_I6570 The 1{sigma} uncertainty in I6570 (3) 276-280 F5.2 --- I6590 Dereddened [NII]6590 surface brightness (3) 282-285 F4.2 --- e_I6590 The 1{sigma} uncertainty in I6590 (3) 287-291 F5.2 --- I6684 Dereddened HeI 6684 surface brightness (3) 293-296 F4.2 --- e_I6684 The 1{sigma} uncertainty in I6684 (3) 298-302 F5.2 --- I6721 Dereddened [SII]6721 surface brightness (3) 304-307 F4.2 --- e_I6721 The 1{sigma} uncertainty in I6721 (3) 309-314 F6.2 --- I6738 Dereddened [SII]6738 surface brightness (3) 316-319 F4.2 --- e_I6738 The 1{sigma} uncertainty in I6738 (3) 321-326 F6.2 --- I7072 Dereddened HeI 7072 surface brightness (3) 328-331 F4.2 --- e_I7072 The 1{sigma} uncertainty in I7072 (3) 333-338 F6.2 --- I7142 Dereddened [ArIII]7142 surface brightness (3) 340-343 F4.2 --- e_I7142 The 1{sigma} uncertainty in I7142 (3) 345-347 A3 --- Class Object classification (WR* for 5 objects) -------------------------------------------------------------------------------- Note (1): R136 = RMC 136; position 05 38 42.396 -69 06 03.36, from Simbad, used to compute sexagesimal positions in VizieR. Note (2): In units of erg/s/cm^2^/arcsec^2^ Note (3): Relative to H{beta}. -------------------------------------------------------------------------------- History: From electronic version of the journal ================================================================================ (End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 30-Nov-2010