2007ApJ...656...73L

Query : 2007ApJ...656...73L

2007ApJ...656...73L - Astrophys. J., 656, 73-83 (2007/February-2)

Broad absorption line variability in repeat quasar observations from the Sloan Digital Sky Survey.

LUNDGREN B.F., WILHITE B.C., BRUNNER R.J., HALL P.B., SCHNEIDER D.P., YORK D.G., VANDEN BERK D.E. and BRINKMANN J.

Abstract (from CDS):

We present a time-variability analysis of 29 broad absorption line quasars (BALQSOs) observed in two epochs by the Sloan Digital Sky Survey. These spectra are selected from a larger sample of BALQSOs with multiple observations by virtue of exhibiting a broad C IV λ1549 absorption trough separated from the rest frame of the associated emission peak by more than 3600 km/s. Detached troughs facilitate higher precision variability measurements, since the measurement of the absorption in these objects is not complicated by variation in the emission-line flux. We have undertaken a statistical analysis of these detached-trough BALQSO spectra to explore the relationships between BAL features that are seen to vary and the dynamics of emission from the quasar central engine. We have measured variability within our sample, which includes three strongly variable BALs. We have also verified that the statistical behavior of the overall sample agrees with current model predictions and previous studies of BAL variability. Specifically, we observe that the strongest BAL variability occurs among the smallest equivalent width features and at velocities exceeding 12,000 km/s, as predicted by recent disk-wind modeling.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Quasars: General

CDS comments: Table 1: numbering NN (Nos 1-29) is not used in SIMBAD, Objects are SDSS JHHMMSS.ss+DDMMSS.s.

Simbad objects: 29

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Number of rows : 29
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [VV2006] J004527.7+143815 QSO 00 45 27.6880548528 +14 38 16.136609676   18.23 17.72     ~ 35 1
2 [VV2006] J031828.9-001523 QSO 03 18 28.9098515448 -00 15 23.227393032   18.1 18.41 18.6   ~ 37 0
3 [VV2006] J075010.2+304032 QSO 07 50 10.1728990776 +30 40 32.389526028   19.15 18.91     ~ 34 0
4 [VV2006] J081416.7+435404 QSO 08 14 16.7619528144 +43 54 05.047258104   20.03 19.74     ~ 25 0
5 [VV2006] J081657.5+060441 QSO 08 16 57.5532995760 +06 04 41.681026128   19.57 19.25     ~ 21 0
6 [VV2006] J081822.6+434633 QSO 08 18 22.6346143296 +43 46 33.854609712   18.76 18.46     ~ 26 0
7 [VV2006] J093620.6+004649 QSO 09 36 20.5229259816 +00 46 49.273583268   19.12 18.90     ~ 32 0
8 [VV2006] J102250.1+483631 QSO 10 22 50.1672650520 +48 36 31.220624196   19.51 19.18     ~ 31 0
9 [VV2006] J115031.0-004403 QSO 11 50 31.0259367720 -00 44 03.281019396   20.77 20.66     ~ 26 0
10 [VV2006] J130058.1+010551 QSO 13 00 58.1351699496 +01 05 51.723475224   19.76 19.55     ~ 32 0
11 [VV2006] J131305.7+015926 QSO 13 13 05.7528537528 +01 59 26.937685248   19.37 19.15     ~ 27 0
12 [VV2006] J131853.5+002211 QSO 13 18 53.4516353904 +00 22 11.583726996   19.20 18.92     ~ 34 0
13 QSO J1323-0038 QSO 13 23 04.5847205784 -00 38 56.517086580   18.94 18.58     ~ 48 0
14 [VV2006] J132743.0+003532 QSO 13 27 42.9266603928 +00 35 32.665003692   19.21 18.95     ~ 41 0
15 [VV2006] J133150.5+004519 QSO 13 31 50.5174651128 +00 45 18.860232960   19.61 19.38     ~ 37 0
16 [VV2006] J134544.6+002810 QSO 13 45 44.5484260344 +00 28 10.787357244   18.89 18.65     ~ 44 0
17 [VV2006] J143130.1+570138 QSO 14 31 30.0376320360 +57 01 38.949703572   18.38 18.23     ~ 32 0
18 [VV2006] J143641.2+001559 QSO 14 36 41.2423729464 +00 15 58.914773640   19.15 18.86     ~ 39 0
19 [VV2006] J144403.9+565751 QSO 14 44 03.9620054352 +56 57 51.393636396   18.60 18.43     ~ 29 0
20 [VV2006] J145000.0+003224 QSO 14 49 59.9680798176 +00 32 25.390816152   19.44 19.33     ~ 33 0
21 [VV2006] J145428.5+571441 QSO 14 54 28.5227694720 +57 14 41.324898804   20.63 20.12     ~ 26 0
22 [VV2006] J150109.1-011502 QSO 15 01 09.1381672080 -01 15 02.731730904   20.04 19.63     ~ 20 0
23 [VV2006] J150206.7-003607 QSO 15 02 06.6569774112 -00 36 06.962444496   19.11 18.97     ~ 37 0
24 QSO J1537+5332 QSO 15 37 03.9463939656 +53 32 20.032814976   18.50 18.31     ~ 35 0
25 [VV2006] J160649.3+451051 QSO 16 06 49.2393116304 +45 10 51.701251800   19.26 18.99     ~ 28 0
26 [VV2006] J170633.1+615714 QSO 17 06 33.0636547104 +61 57 15.072699996   19.10 18.91     ~ 31 0
27 [VV2006] J172001.4+621245 QSO 17 20 01.3012072632 +62 12 45.752811912   19.95 19.62     ~ 28 0
28 [VV2006] J224019.1+144435 QSO 22 40 19.0146373032 +14 44 35.526376248   19.41 19.06     ~ 27 0
29 QSO B2342+007 QSO 23 45 06.3143638176 +01 01 35.569591824   19.73 19.62     ~ 37 0

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