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					High Velocity Outflows
      in Quasars
   Paola Rodriguez Hidalgo
    Advisor: Fred Hamann
      University of Florida
 Collaborators: Daniel Nestor,
        Joseph Shields
 Classification of Absorption Lines
 Based on similar redshift to the quasar:
                      Associated
                      Non-associated
 Based on the absorber is ejected from the quasar:
                      Intrinsic
                      Non-intrinsic
 Based on the width of the line:
      BAL
      NAL
      miniBAL
 Classification of Absorption Lines
 Based on similar redshift to the quasar:
                       Associated
                       Non-associated               High Velocity
 Based on the absorber is ejected from the quasar:
                       Intrinsic                  Outflows
                       Non-intrinsic
 Based on the width of the line:
      BAL: form in winds
      NAL: origin? Most AALs are intrinsic (see Leah Simon,
     Daniel Nestor and Rajib Ganguly posters), how many at High
     Velocity (HV) are intrinsic? (36% ? - Richards et al. 1999,
     2001)
      miniBAL: barely studied: how common are they?, how
     often do they appear at HV?
    Example of a
High Velocity Outflow
   Ly+NV               PG 0935+417


                   v ~ 51,000 km/s
                   SiIV+OIV          CIV



            CIV!
                    Goals
1) Account for types of outflows to input
   information into physical/geometrical
   models.
2) Understand miniBAL-BAL relationship:
   distinct or same thing with different
   sightline?
3) Confirm intrinsic nature of large number of
   systems for follow-up and, hopefully, get
   information about location, densities, … and
   to explain wind structure and dynamics.
   Searching for High Velocity
     Outflows: the Sample
 SDSS Quasar spectra:
    R ~ 150 km/s
    Spectral coverage 3820-9200 A;
     to see CIV 1548,1550 absorbers: zem > 1.8
     to see velocities up to 0.2c:        zem > 2.1
    Choose the n(t) spectra with best S/N
    Look for every blue-shifted CIV absorber
         - zabs, v, FWHM, REW, BI, AI
   Searching for High Velocity
     Outflows: the Sample
 SDSS Quasar spectra:
    R ~ 150 km/s
    Spectral coverage 3820-9200 A;
     to see CIV 1548,1550 absorbers: zem > 1.8
     to see velocities up to 0.2c:        zem > 2.1
    Choose the 2,200 spectra with best S/N -> 1,846
    Look for every blue-shifted CIV absorber
        - zabs, v, FWHM, REW, BI, AI
        - 5320 absorption systems measured
.11   17.13   17.08   16.80   16.71   02:08:45.54    00:22:36.07   1.885   1.677   22502   1551   0.61   0.43
.95   17.46   17.08   16.95   16.80   12:05:50.19    02:01:31.58   2.133   1.964   16108   6077   2.82   1.42
.66
.56
      17.36
      17.23   Searching for High Velocity
              17.09
              17.09
                      17.01
                      16.97
                              16.85
                              16.90
                                      13:28:01.25
                                      16:55:42.60
                                                     57:31:13.09
                                                     38:13:38.36
                                                                   2.057
                                                                   1.906
                                                                           1.657
                                                                           1.509
                                                                                   41774
                                                                                   43746
                                                                                           2800
                                                                                           2482
                                                                                                  1.89
                                                                                                  0.81
                                                                                                         0.95
                                                                                                         0.81

                 Outflows: the results
.63   17.43   17.21   17.07   16.91   14:41:05.53    04:54:54.95   2.064   1.543   55229   4243   3.66   1.90
.63   17.43   17.21   17.07   16.91   14:41:05.53    04:54:54.95   2.064   1.618   46772   2381   1.01   0.51
.35   17.31   17.27   17.09   17.02   10:31:12.24    38:07:17.23   1.893   1.684   22480    986   0.44   0.44
.21   17.82   17.28   16.84   16.76   14:37:52.76    04:28:54.54   1.919   1.733   19702   3849   3.52   1.88
.23   17.56   17.30   17.25   16.94   11:13:13.29    10:22:12.45   2.247   2.026   20884    992   1.44   1.44
.62   17.50   17.38   17.27   17.04   13:48:55.28   -03:21:41.41   2.099   1.550   57766   1592   0.96   0.96
.95   17.86   17.42   16.97   16.97   08:10:33.57    23:32:23.10   1.869   1.739   11233   5609   4.57   2.29
.40   17.78   17.45   17.46   17.33   09:46:46.94    39:27:19.02   2.207   1.815   38878   2619   2.82   2.84
.06   17.61   17.49   17.49   17.28   10:43:30.09    44:10:51.61   2.209   1.980   22136   2264   2.32   1.17
.77   17.62   17.53   17.40   17.13   14:22:46.59    35:28:36.02   2.105   1.921   18303   1944   1.56   1.56
.74   17.59   17.55   17.32   17.32   10:01:28.61    50:27:56.90   1.839   1.765    7589   2709   1.88   1.91
.02   17.79   17.55   17.45   17.27   16:15:11.36    31:47:28.35   2.095   1.764   33705   3713   2.73   2.75
.02   17.79   17.55   17.45   17.27   16:15:11.36    31:47:28.35   2.095   1.874   22175   1341   1.75   0.88
.82   17.64   17.59   17.45   17.37   14:16:44.39    44:15:57.39   1.921   1.718   21537   1545   0.58   0.58
.10   17.70   17.61   17.43   17.16   15:45:50.38    55:43:46.23   2.156   1.985   17315    984   0.87   0.82
.36   17.87   17.65   17.61   17.47   08:58:56.01    01:52:19.41   2.158   1.912   24195   1174   0.68   0.34
.13   17.85   17.65   17.52   17.38   08:31:04.90    53:25:00.17   2.065   1.963    9787   1233   2.30   1.15
.95   17.79   17.66   17.44   17.45   12:43:12.94    14:48:12.10   1.860   1.709   16319   1182   0.72   0.72
CIV absorbers found




   Restframe wavelength (A)
      CIV absorbers found
• Number of miniBALs = 423
• Number of quasars with miniBALs =
  284
• Number of quasars with miniBALs at
  v > 10,000 km s-1 = 175
• Number of quasars with miniBALs at
  v > 25,000 km s-1 = 51
CIV absorbers found
       14%

             2.5%
Some questions:
 What sorts of structures and what lines of
  sight through the outflow produce miniBALs?
 How often should we see miniBALs vs BALs
  and NALs if we view these outflows along
  random sightlines?
 How fast do miniBALs evolve or cross the line
  of sight? Should we see acceleration
  /decceleration?
 Should HV miniBALs come with more/less
  Xray abs than BALs?
Variability study
Ly+NV               PG 0935+417


                v ~ 51,000 km/s
                SiIV+OIV          CIV



         CIV!
Variability study




   HV CIV

  Observed wavelength (A)
  Searching for Variability: Data
 KPNO 2.1m :    R~200 km s-1, ~3600-6200 A
 MDM 2.4m : R~230 km s-1 , ~3600-5200 A
  (collaboration with Joe Shields)
 Lick 3.0m : (collaboration with Jason
  Prochaska)
 Literature: LBQS survey (Hewitt et al. 1994),
  etc…
Variability study: some results
   Variability study: some results
• 18 well-measured quasars in 3 observing campaigns
• 5 quasars show clear variability in miniBALs
  (5/18~30%):
  If changes are due to ionization:
    tobs=0.7-1.9 yrs = high (?) upper limit for tvar
    ne= 6000-16200 cm-3 : lower limit
    Rmax=1700-4900 pc : upper limit
• So far, no variability in NALs
• Most systems vary only in strength, but some show
  shift in velocities
      Current & Future work
 Continue Variability study ->looking for more
  intrinsic systems and monitoring campaign to
  study flow properties of confirmed ones
 High resolution observations of
  best/interesting candidates to obtain more
  accurate properties
 Compare to absorption in Xray data to
  explore UV-Xray correlations and the
  relationship miniBALs-BALs
 Input results in current theoretical models to
  help constrain parameters
                   Summary
 We have searched the SDSS database looking for CIV
  absorbers to compile, for the first time, a catalog of
  CIV absorption lines in high-redshift quasars: 2,200
  quasars, 5320 CIV absorption systems found
 We did and continue to follow up some of these
  systems with new observations (KPNO 2.1m,
  MDM 2.4m, Lick 3.0m) to confirm intrinsic nature
  based on variability and characterize it.
 We will follow up with Xray observations to study the
  relationship UV-Xray absorbers and miniBALs-BALs.
 We will input the results into theoretical models to
  help constrain model parameters.

                        Xiexie
Questionable/Interesting HV
        candidates

				
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posted:1/9/2013
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