H α imaging survey of galaxies within 10 Mpc
description
Transcript of H α imaging survey of galaxies within 10 Mpc
![Page 1: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/1.jpg)
Hα imaging survey of galaxies within 10 Mpc
“Nearby Dwarf Galaxies” SAO RAS, September 14-18 2009
byIgor D.Karachentsev & Serafim S. Kaisin
Special Astrophysical Observatory
Russian Academy of Sciences
![Page 2: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/2.jpg)
Growth of the Local Volume sample (D < 10 Mpc)
Year Reference Number
------------------------------------------- 1979 Kraan-Korteweg & Tammann 179
1994 Karachentsev 215
2004 Karachentsev et al.=CNG 451
2009 current version of CNG 730
-------------------------------------------
![Page 3: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/3.jpg)
Basic contributions to the Hα survey of the LV galaxies
Authors Year Reference NLV Sample
------------------------------------------------------------------------------------------------------------------------ Kennicutt & Kent 1983 AJ, 88, 1094 25 S,Ir Kennicutt et al. 1989 ApJ, 337, 761 14 S,Ir Hunter et al. 1993 AJ, 106, 1797 37 Ir Miller & Hodge 1994 ApJ, 427, 656 11 M81 group Young et al. 1996 AJ, 112, 1903 16 S
van Zee 2000 AJ, 119, 2757 15 Ir isolated Bell & Kennicutt 2001 ApJ, 548, 681 24 S,Ir Gil de Paz et al. 2003 ApJS, 147, 29 10 BCD James et al. 2004 A&A, 414, 23 49 SO/a - Im Hunter & Elmegreen 2004 AJ, 128, 2170 50 Im, BCD
Meurer et al. 2006 ApJS, 165, 307 10 HIPASS selected Epinat et al. 2008 MNRAS, 390, 466 27 S Kennicutt et al. 2008 ApJS, 178, 247 171 T>-1, B <15m,|b|>20° Bouchard et al. 2009 AJ, 137, 3038 18 Scu & CenA groups Karachentsev & Kaisin 2005 - 2010 207 All types ------------------------------------------------------------------------------------------------------------------------
![Page 4: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/4.jpg)
![Page 5: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/5.jpg)
![Page 6: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/6.jpg)
Basic relations
SFR(M/yr) = 1.27 · 109 FC (Hα) · D2 — Gallagher et all. (1984), where D is distance in Mpc,
FC is flux in (erg· cm-2· sec-1 ) corrected for the Galactic (Schlegel et all. 1998) and internal extinction
A(Hα) = 0.538·AB
Aint =[1.6+2.8(logVm -2.2)] · log(a/b), if Vm > 42.7 km/c, otherwise Aint = 0
Log(MHI/ M) = log FHI + 5.37 +2 · log DMpc
PK=log([SFR]·T0/LK), F=log(MHI/[SFR]·T0)
K – magnitudes from 2MASS or via:
<B-K> =4.10 for T≤ 2 {E, SO, Sa)
<B-K> =4.60 – 0.25 ·T for T= 3-8
<B-K> =2.35 for T=9,10 (Sm, BCD, Ir)
![Page 7: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/7.jpg)
![Page 8: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/8.jpg)
![Page 9: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/9.jpg)
Hα view of the Garland from the 6-m telescope
![Page 10: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/10.jpg)
Hα view of the UA281 from the 6-m telescope
![Page 11: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/11.jpg)
![Page 12: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/12.jpg)
![Page 13: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/13.jpg)
![Page 14: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/14.jpg)
![Page 15: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/15.jpg)
Hα view of the NGC4460 from the 6-m telescope
![Page 16: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/16.jpg)
![Page 17: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/17.jpg)
![Page 18: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/18.jpg)
![Page 19: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/19.jpg)
![Page 20: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/20.jpg)
![Page 21: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/21.jpg)
Stinson, Dalcanton et al. (2007, ApJ, 667, 170) simulated the collapse of isolated dIr's with effects of SN feedback. They found cyclic SF bursts on a scale of ~0.3 Gyr with a SFR- amplitude about 10 times for low mass dwarfs having Vm < 20 km/s.
![Page 22: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/22.jpg)
Hα view of the NGC4449 from the 6-m telescope
![Page 23: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/23.jpg)
Hα view of the DDO125 from the 6-m telescope
![Page 24: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/24.jpg)
Hα view of the DDO181 from the 6-m telescope
![Page 25: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/25.jpg)
Hα view of the UGC8215 from the 6-m telescope
![Page 26: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/26.jpg)
![Page 27: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/27.jpg)
![Page 28: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/28.jpg)
![Page 29: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/29.jpg)
The total star formation rate density in the Local universe( Z = 0, Ho = 72 km/s/Mpc, extinction corrected)
----------------------------------------------------------------------------------------- Log(SFR density) Reference Note
Myr -1 Mpc-3 --------------------------------------------------------------------------------------- -1.95 +/- 0.04 Gallego et al. 1995 em. line gg. -1.73 +/- 0.07 Tresse & Maddox 1998 I-band survey -1.64 +/- 0.02 Perez-Gonzalez et al. 2003 opt.-selected -1.66 +/- 0.08 Brinchmann et al. 2004 SDSS-based -1.81 +/- 0.03 Hanish et al. 2006 HI- selected -1.75 +/- 0.03 Salim et al. 2007 UV-based -1.72 +/- 0.08 James et al. 2008 Hα Local Univ. -1.77 +/- 0.08 present talk Hα Local vol. ----------------------------------------------------------------------------------------
![Page 30: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/30.jpg)
Some cosmic (global) parameters (h = 0.72, Z = 0)
---------------------------------------------------------------------------------------------------------------------
The critical density: 1.43 ·1011 M/Mpc3 K-luminosity density: 4.6 ·108 L/Mpc3 (Kochanek et al.2001) + (Bell et al. 2003) HI density: 0.55 ·108 M/Mpc3 HIPASSSFR density: 0.017 M/yr Mpc3 present talk PK -0.30 present talkF -0.63 present talk Fcorr -0.36 (+0.17dex HeI, +0.10dex HII)
--------------------------------------------------------------------------------------------------------------------- Cosmic baryon budget (Fukugita, 2003) in the Omega-units:
0.25% (stars) + 0.08% (HI+HeI+H_2) + 0.20% (hot gas in clusters) + 2.2% (warm & cold gas) = 2.7%
versus (4.4+-0.4)% from Big Bang Nucleosynthesis---------------------------------------------------------------------------------------------------------------------
![Page 31: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/31.jpg)
Concluding remarks and questions
• We should aspire to image ALL the LV galaxies in Hα and in HI without any morphological selection.
• Should we try to reach such deep limiting fluxes for survey: F(Hα) = 10-15 (erg/cm2 sec) or log[SFR] = -4.1 at D = 8 Mpc F(HI) = 0.1 Jy·km/sec or log MHI= 6.2 at D = 8 Mpc (competition with data on UV-fluxes from GALEX or EW from Sloan)
• Does the quadrant {PK > 0, F > 0} is almost empty or it contains many hidden objects like HIJASS near IC2574, HI1225+01 in Virgo, and "Leib“ (AGC219303) near NGC3628 ?
• SAO database for the Local Volume galaxies (N = 730) will be ready soon.
![Page 32: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/32.jpg)
![Page 33: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/33.jpg)
HI1225+01 in Virgo
![Page 34: H α imaging survey of galaxies within 10 Mpc](https://reader036.fdocuments.net/reader036/viewer/2022062315/56814fa8550346895dbd678b/html5/thumbnails/34.jpg)
Thanks for your attention