A Low-Mass Black Hole in the Nearby Seyfert Galaxy UGC 06728
| Autor: | Bentz, Misty C., Batiste, Merida, Seals, James, Garcia, Karen, de Naray, Rachel Kuzio, Peters, Wesley, Anderson, Matthew D., Jones, Jeremy, Lester, Kathryn, Machuca, Camilo, Parks, J. Robert, Pope, Crystal L., Revalski, Mitchell, Roberts, Caroline A., Saylor, Dicy, Sevrinsky, R. Andrew, Turner, Clay |
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| Rok vydání: | 2016 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.3847/0004-637X/831/1/2 |
| Popis: | We present the results of a recent reverberation mapping campaign for UGC 06728, a nearby low-luminosity Seyfert 1 in a late-type galaxy. Nightly monitoring in the spring of 2015 allowed us to determine an H$\beta$ time delay of $\tau = 1.4 \pm 0.8$ days. Combined with the width of the variable H$\beta$ line profile, we determine a black hole mass of $M_{\rm BH} = (7.1 \pm 4.0) \times 10^5$ M$_{\odot}$. We also constrain the bulge stellar velocity dispersion from higher-resolution long slit spectroscopy along the galaxy minor axis and find $\sigma_{\star} = 51.6 \pm 4.9$ km s$^{-1}$. The measurements presented here are in good agreement with both the $R_{\rm BLR} - L$ relationship and the $M_{\rm BH}-\sigma_{\star}$ relationship for AGNs. Combined with a previously published spin measurement, our mass determination for UGC 06728 makes it the lowest-mass black hole that has been fully characterized, and thus an important object to help anchor the low-mass end of black hole evolutionary models. Comment: accepted for publication in ApJ; 10 pages, 10 figures, 5 tables |
| Databáze: | arXiv |
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