normal galaxies sample from 2df-xmm wide angle survey

13
Normal Galaxies Sample From 2dF-XMM Wide Angle Survey Jonathan Tedds, Silvia Mateos, Mike Watson, Matthew Page, Francisco Carrera, Mirko Krumpe, Jacobo Herrero, Amalia Corral … XMM-Newton SSC X-ray & Observational Astronomy X-ray & Observational Astronomy Yueheng Xu

Upload: bart

Post on 14-Jan-2016

36 views

Category:

Documents


0 download

DESCRIPTION

X-ray & Observational Astronomy. Normal Galaxies Sample From 2dF-XMM Wide Angle Survey. Yueheng Xu. Jonathan Tedds, Silvia Mateos, Mike Watson, Matthew Page, Francisco Carrera, Mirko Krumpe, Jacobo Herrero, Amalia Corral … XMM-Newton SSC. X-ray & Observational Astronomy. - PowerPoint PPT Presentation

TRANSCRIPT

Page 1: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

Normal Galaxies Sample From

2dF-XMM Wide Angle Survey

Jonathan Tedds, Silvia Mateos, Mike Watson, Matthew Page, Francisco Carrera, Mirko Krumpe, Jacobo Herrero, Amalia Corral … XMM-Newton SSC

X-ray & Observational AstronomyX-ray & Observational Astronomy

Yueheng Xu

Page 2: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

2dF-XMM Wide Angle Survey

10 degree2

> 3000 X-ray sources from ~ 70 XMM observations

Optical spectra from 2dF system on AAT in 27 pointings

> 1000 sources spectroscopically identified

X-ray & Observational AstronomyX-ray & Observational Astronomy

Page 3: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

2dF spectral identifications

GAL: absorption line galaxies NELG: narrow emission line galaxies

BLAGN: broad line AGN STARs

Page 4: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

Sample selection:

Galaxies with:

• (1) Absorption line or narrow emission line 2dF spectra i.e. GAL or NELG

• (2) X-ray flux to optical flux ratios ≤ 0.1, i.e. log10 (fX / fOPT) ≤ -1fX in 0.2-12 keV, and log10 (fX / fOPT) calculated aslog10 (fX/fOPT) = log10fX + 5.5 + R/2.5

• (3) X-ray luminosities LX ≤ 1043 erg s-1

LX in 0.2-12 keV

Page 5: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

Sample selection:

+

Sample sources

NELG

GAL

BLAGN

Star

NELG

GAL

BLAGN

This work

The sample includes 72 normal galaxy candidates with the mean z of 0.13.This makes up ~40% of the X-ray emitting galaxies (R < 19) in the area – essentially those which would meet our selection criteria.

Page 6: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

Information available:

X-ray: spectra/hardness ratios, extent

Optical: image, spectra

Other wavelengths: Radio, IR…

Page 7: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

HIIComposite HII

AGN Seyfert

LINER

AGN (definite and tentative)

HII-region like galaxy (definite and tentative)

Galaxies are marked based on their final classifications, which does not include Composite type as an independent type. AGN type includes Seyfert and LINERs. One σ errors are shown only when the source has been definitely classified under the line ratio diagnostic classification schema.

Emission line ratio classification

Page 8: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

HR2=(CR3-CR2)/(CR2+CR3)HR3=(CR4-CR3)/(CR3+CR4)

CR2: 0.5-1.0 keVCR3: 1.0-2.0 keVCR4: 2.0-4.5 keV

Galaxies are marked based on their final classifications.

Green grid: non-thermal (power-law) model with Γ = 0.75, 1.0, 1.5, 2.0, and 2.5 from top to bottom, and NH = 0, 1×1020, 1×1021, 5×1021, 1×1022, and 5×1022 cm-2 from left to right.

Blue grid: thermal model (APEC) with kT = 0.1, 0.25, 1.0, 1.5, 2.0, 2.5 and 3.0 keV from bottom to top, and NH = 0, 1×1020, 1×1021, 5×1021 cm-2 from left to right.

AGN (definite and tentative)

HII-region like galaxy (definite and tentative)

Hot gas halo (definite and tentative)

Normal galaxy

X-ray hardness ratio diagram

Page 9: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

X02262_00066z = 0.066

NH (intrinsic) = 45.2 (-16.6, +29.7) 1020 cm-2 Power-law: Г = 1.64 (-0.33, +0.38)

Absorbed AGN candidate. The 2dF optical spectrum lacks strong emission lines, but the absorbed hard XMM X-ray spectrum and relatively high X-ray luminosity (LX ≈ 4.7 × 1041 erg s-1) indicate a possible obscured AGN.

Page 10: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

X02418_00068z = 0.077

Raymond-Smith: kT = 0.69 (-0.18, +0.14) keV+Power-law: Г = 1.80 (-0.40, +0.40)

Starburst Galaxy. The 2dF optical spectrum of this system shows evidence of existence of strong star-forming activity. The XMM X-ray spectrum requires both hard and soft components, which is consistent with the co-existence of a starburst and an AGN found in infrared (Farrah et al. 2003).

Page 11: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

X21226_00075z = 0.084

Raymond-Smith: kT = 0.80 (-0.07, +0.05) keV

Gas halo. X-ray source extent and the soft XMM spectrum suggest that this galaxy sits within a group of galaxies (also evident in optical image). The 0.2-12 keV luminosity derived from the best fit model is ~ 1.8 × 1041 erg s-1.

Page 12: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

Breakdown of source types:

definite tentative fraction of the sample

AGN 13 (18%) 17 (24%) 42%

HII-region like galaxy 10 (14%) 1 (1%) 15%

Has halo 12 (17%) 4 (6%) 22%

Normal galaxy 17 24%

TOTAL 72

After excluding the AGN type sources from the sample, the remaining normal or star-forming galaxies have z = 0.027-0.3, log10 (fX / fOPT) = (-3.5)-(-1), LX = 1040.1-42.4 erg s-1.

Among the AGN (definite or tentative) in the sample, there are 5 possible XBONGs, whose AGN features are not accessible in optical spectra but have hard X-ray hardness ratios and/or high X-ray luminosities (LX > 1042 erg s-1).

Page 13: Normal  Galaxies Sample From  2dF-XMM  Wide Angle Survey

X-ray & Observational AstronomyX-ray & Observational Astronomy

Whole Sample

Normal(and unclassified!)

HII

GAS

AGN