Quasar identification with narrow-band cosmological surveys

Transcription

1 Quasar identification with narrow-band cosmological surveys The case of J-PAS Silvia Bonoli and the J-PAS collaboration ESO, 28th June 2016

2 Hyper Subaru DESI

3 Spectrocopic vs. - Provide SED (Precise z and classification) Quasar identification with narrow-band cosmological surveys Photometric - Large Volumes High number density No selection biases Deep Silvia Bonoli

4 Spectrocopic vs. - Provide SED (Precise z and classification) Photometric - Large Volumes High number density No selection biases Deep Vanden Berk et al Richards et al Example of BPT diagram from Trouille et al Quasar identification with narrow-band cosmological surveys Mid-z (2.5<z<3) problem Silvia Bonoli

5 Spectrocopic vs. - Provide SED (Precise z and classification) Spectro-Photometric COMBO-17 Photometric - Large Volumes High number density No selection biases Deep

6 COMBO-17 Wolf et al % precision in photo-z Masters et al % precision in photo-z Salvato et al. 2011

7 Advance Large Homogeneous Area Medium-Band Redshift Astronomical survey ~2.8 deg2 20 medium-band filters + JHK 24.5 mag limit (Moles et al. 2008, Benitez et al. 2009) (Molino et al. 2014)

8 Advance Large Homogeneous Area Medium-Band Redshift Astronomical survey ~2.8 deg2 20 medium-band filters + JHK 24.5 mag limit (Moles et al. 2008, Benitez et al. 2009) Looking for broad-line AGN with a two-step procedure: 1) Candidates selection Using the photometric-redshift code LePhare (Arnouts et al. 1999, Ilbert et al. 2006) run on the whole catalogue (~ objects), with no previous cuts in morphology, luminosity or colors (Chaves-Montero, SB & Salvato, in prep) 2) Spectro-photometric confirmation Looking for emission lines... Using a newly-developed line-searching code a) Calculates the expected locations of the major QSO broad emission lines, based on the photo-z given by LePhare b) Searches for excess in the photometry in the bands where emission lines are expected

9 Advance Large Homogeneous Area Medium-Band Redshift Astronomical survey ~2.8 deg2 20 medium-band filters + JHK 24.5 mag limit (Moles et al. 2008, Benitez et al. 2009) (Chaves-Montero, SB & Salvato, in prep)

10 Advance Large Homogeneous Area Medium-Band Redshift Astronomical survey ~2.8 deg2 20 medium-band filters + JHK 24.5 mag limit (Moles et al. 2008, Benitez et al. 2009) Final sample of 1880 AGN at z>1.5 (Chaves-Montero, SB & Salvato, in prep)

11 Advance Large Homogeneous Area Medium-Band Redshift Astronomical survey ~2.8 deg2 20 medium-band filters + JHK 24.5 mag limit (Moles et al. 2008, Benitez et al. 2009) Final sample of 1880 AGN at z>1.5 (Chaves-Montero, SB & Salvato, in prep) 1% redshift precision See also, Matute et al. 2012

12 Planned to start at the beginning of 2017, the J-PAS survey will scan ~8500 deg2 of the northern sky with 54 narrow-band filters covering the whole optical range from the dedicated 2.5m telescope in the sierra of Javalambre Quasar identification with narrow-band cosmological surveys Silvia Bonoli

13 The Javalambre Observatory In the Sierra de now officially a Spanish scientific and technical facility (~20% open-time available to the community) JST (T250) JAST (T80) Quasar identification with narrow-band cosmological surveys Silvia Bonoli

14 The Javalambre Observatory Comparable (at similar altitudes) to Mauna Kea or La Silla Seeing (median) = 0.71 Quasar identification with narrow-band cosmological surveys Silvia Bonoli

15 The telescope and JPCam T250 M1 ( ) = 2.55 m FoV ( ) = 3 deg = 476 mm at FP Effective collecting area = 3.89 m2 Etendue = 27.5 m2deg2 1.2 Giga pixels (14 CCD of 9200x9200) 0.22 arcsec/pixel 4.5 deg2

16 JPCam

17 The filter system - 54 NB filters (FWHM~145Å; ~10nm) From 3785Å to 9100Å - 1 Blue MB filter (FWHM~260Å; c~3600å) - 1 Red BB filter (FWHM~620Å; c~9500å) - Sloan u, g, r Pseudo-spectrum (R~50) in every pixel of the sky down to MAB ~ Quasar identification with narrow-band cosmological surveys Silvia Bonoli

18 The filter trays Tray 2 Tray 1 Tray 4 Quasar identification with narrow-band cosmological surveys Tray 3 Tray BB Silvia Bonoli

19 Limiting magnitudes 5σ 3arcsec aperture T1 T2 T3 T4 Minimum of 4 (60 sec) exposures in each filter (2+1+1) Survey speed ~ 1200 deg² /yr

20 A redshift machine... z=1-500m galaxies - 90M LRG+ELG (with 0.3% photo-z precision) - Millions on quasars Quasar identification with narrow-band cosmological surveys Silvia Bonoli

21 z=1.0 Quasar identification with narrow-band cosmological surveys Silvia Bonoli

22 z=2.2 Quasar identification with narrow-band cosmological surveys Silvia Bonoli

23 z=3.4 1% photo-z errors Quasar identification with narrow-band cosmological surveys 0.3% photo-z errors Very high completeness and purity Silvia Bonoli

24 Exploring the potential of J-PAS for selecting TypeII AGN... z~2.1 z~2.2 J-PAS-view of a sample of CIVselected AGN from zcosmos (from Mignoli et al.) Quasar identification with narrow-band cosmological surveys Silvia Bonoli

25 8500 deg2 of the northern hemisphere 54 NB + 5 MB/BB filters Up to mag ~24 Reaching 0.3% photo-z precision Open time available! Millions of quasars/agn Environment Synergy with surveys in other λ Complete and pure samples for spec follow-ups (e.g, WEAVE) Quasar identification with narrow-band cosmological surveys Silvia Bonoli

26 Extra Slides Quasar identification with narrow-band cosmological surveys Silvia Bonoli

27 deg observed from Spain with 2 telescopes 2 54 NB + 5 MB/BB filters 4.5 deg2 FoV Up to mag ~24 90M ELG and LRG Reaching 0.3% photo-z precision Millions of quasars 200M of galaxies 4000 SNIa 700k of groups and clusters Starts at the end of NB/MB/BB filters 2 deg2 FoV Up to mag ~23 SEDs of 5M stars Already started! Already replica in the Tololo Survey S-PLUS Possible replica in the South More details in Benitez et al arxiv:

28 The J-PLUS survey Javalambre Photometric Local Universe Survey T80 [OII] ujava gsdss rsdss Hα isdss Mgb Triplet zsdss CaTriplet 12 filters ~ 1 mag deeper then SDSS 3 exposures (12 exposures in g,r) 1 CCD of 9200x9200 pixels 0.55 arcsec/pixel ~2 deg2

29 T80 + T80Cam Mosaic of Virgo

30 T80 + T80Cam Mosaic of Virgo

31 T80 + T80Cam Mosaic of Virgo