التفاصيل البيبلوغرافية
| العنوان: |
The Sloan Digital Sky Survey Reverberation Mapping Project: Initial C iv Lag Results from Four Years of Data. |
| المؤلفون: |
C. J. Grier, Yue Shen, Keith Horne, W. N. Brandt, J. R. Trump, P. B. Hall, K. Kinemuchi, David Starkey, D. P. Schneider, Luis C. Ho, Y. Homayouni, Jennifer I-Hsiu Li, Ian D. McGreer, B. M. Peterson, Dmitry Bizyaev, Yuguang Chen, K. S. Dawson, Sarah Eftekharzadeh, Yucheng Guo, Siyao Jia |
| المصدر: |
Astrophysical Journal; 12/10/2019, Vol. 887 Issue 1, p1-1, 1p |
| مصطلحات موضوعية: |
QUASARS, ASTRONOMICAL surveys, BLACK holes, MASS measurement, MAGNITUDE (Mathematics), LUMINOSITY |
| الشركة/الكيان: |
SLOAN Digital Sky Survey |
| مستخلص: |
We present reverberation-mapping (RM) lags and black hole mass measurements using the C iv λ1549 broad emission line from a sample of 348 quasars monitored as a part of the Sloan Digital Sky Survey RM Project. Our data span four years of spectroscopic and photometric monitoring for a total baseline of 1300 days, allowing us to measure lags up to ∼750 days in the observed frame (this corresponds to a rest-frame lag of ∼300 days in a quasar at z = 1.5 and ∼190 days at z = 3). We report significant time delays between the continuum and the C iv λ1549 emission line in 48 quasars, with an estimated false-positive detection rate of 10%. Our analysis of marginal lag measurements indicates that there are on the order of ∼100 additional lags that should be recoverable by adding more years of data from the program. We use our measurements to calculate black hole masses and fit an updated C iv radius–luminosity relationship. Our results significantly increase the sample of quasars with C iv RM results, with the quasars spanning two orders of magnitude in luminosity toward the high-luminosity end of the C iv radius–luminosity relation. In addition, these quasars are located at some of the highest redshifts (z ≈ 1.4–2.8) of quasars with black hole masses measured with RM. This work constitutes the first large sample of C iv RM measurements in more than a dozen quasars, demonstrating the utility of multiobject RM campaigns. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
