January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 1 Slicing Up Galactic HII Regions with NIFS R. Blum NOAO Gemini Science Center, Tucson

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 2 NIFS/Altair Observations GT observations w/Peter McGregor Barbosa et al. 2007A Search for ionizing sources of Galactic HII regions (massive stars, distances)‏ NIFS ideal in crowded fields, high S/N, detect weak features UCHII regions Photo credit Gemini and Paul Hirst

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 3 NIFS/Altair Observations K-band Arc '' pixels '' slices

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 4 G Feldt et al. (1998)‏

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 5 G Feldt et al. (1999)‏ He I H2H2 [FeIII ] [ K r II I] H2H2 H2H2

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 6 G , Line Ratios [Fe III] um/2.2178um He I um/Brγ

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 7 G Cloudy He I um/Brγ Brγ / Dust Hunter et al. (2000)‏

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 8 W51 IRS2 VLT Archive image Barbosa et al. (2008)‏ NIR: GWW94; Okumura et al. (2001); Figuerêdo et al. (2008) Masers: Schneps, Genzel et al. (1982), Imai et al. (2002), Eisner et al. (2002) MIDIR: Okamoto et al. (2001), Lacy et al. (2007)

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 9 W51 IRS2 Barbosa et al. (2008)‏

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 10 W51 IRS2: [SIV] Lacy et al. (2007)‏ Ionized outflow from molecular cloud

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo um continuum W51 IRS2: NIFS/Altair/LGS Continuum

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 12 W51 IRS2: NIFS Br 

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 13 W51 IRS2: NIFS Brg channel map NIFS has better angular resolution Total delta V~200 kms

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 14 W51 IRS2: NIFS H2

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 15 IRS2W/W51d AO wins again! Early O-type No CIV, earliest type One of a few of the very youngest, most massive stars detected (Hanson, Bik)‏

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 16 Summary NIFS is a powerful tool for crowded field spectroscopy Excellent line maps, ratios Identified ionizing sources in G , W51 IRS2

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 17 NIFS Slides

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 18 W51 A Part of W51 (~degree)‏ 6-7 kpc LyC ~10^51, 200 O7 V NIR: Goldader, Okumura Completely obscured at visual wavelengths Figuerêdo et al. (2007)‏

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 19 W51 A Figuerêdo et al. (2007)‏ NIRI Distance=2kpc not 6-7 kpc! Still GHII, but smaller by ~10x

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 20 W51 IRS2 Lacy et al. (2007)‏ TEXES 3 kms, 0.6'' slit 3D data sets High/low exitn lines UCHII, MYSOs

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 21 W51 IRS2 Maser proper motions in W51 N (1'' S of IRS2E)‏, Imai et al. (2001) Association with Lacy et al. Out flow unclear Motion mostly in plane of sky Fit to radial out flow: 6 kpc.

January 30, 2008Subaru Users Meeting 2007 NAOJ, Mitaka, Tokyo 22 W51 IRS2e MYSO No photospheric features CO emission