A note on black hole masses estimated by the second moment in Narrow Line Seyfert 1 Galaxies TeX Export

@article{citeulike:3107369, abstract = {The second moment of the H\$\beta\$ emission line is calculated for 329 narrow line Seyfert 1 galaxies (NLS1s) selected from the Sloan Digital Sky Survey (SDSS), which is used to calculate the central supermassive black hole (SMBHs) mass of each. We find that the second moment depends strongly on the broader component of the H\$\beta\$ line profile. We find that for the NLS1s requiring two Gaussians to fit the H\$\beta\$ line the mean value of the SMBH mass from the H\$\beta\$ second moment is larger by about 0.50 dex than that from the full width at half maximum (FWHM). Using the gas velocity dispersion of the core/narrow component of \oiii \$\lambda\$ 5007 to estimate the stellar velocity dispersion, \$\sigma\_{*}\$, the new mass makes NLS1s fall very close to the \$\mbh - \sigma\_{*}\$ relation for normal AGNs. By using \$\sigma\_{*}\$ measured directly from SDSS spectra with a simple stellar population synthesis method, we find that for NLS1s with mass lower than \$10^7 \msun\$, they fall only marginally below the \$\mbh - \sigma\_{*}\$ relation considering the large scatter in the mass calculation.}, archivePrefix = {arXiv}, author = {Bian, Wei-Hao and Hu, Chen and Gu, Qiu-Sheng and Wang, Jian-Min}, citeulike-article-id = {3107369}, citeulike-linkout-0 = {http://arxiv.org/abs/0808.0121}, citeulike-linkout-1 = {http://arxiv.org/pdf/0808.0121}, day = {1}, eprint = {0808.0121}, keywords = {blck, hole, masses, spectroscopic}, month = {Aug}, posted-at = {2008-08-11 10:37:42}, priority = {2}, title = {A note on black hole masses estimated by the second moment in Narrow Line Seyfert 1 Galaxies}, url = {http://arxiv.org/abs/0808.0121}, year = {2008} }

TY - JOUR ID - citeulike:3107369 L3 - citeulike-article-id:3107369 N2 - The second moment of the H$\beta$ emission line is calculated for 329 narrow line Seyfert 1 galaxies (NLS1s) selected from the Sloan Digital Sky Survey (SDSS), which is used to calculate the central supermassive black hole (SMBHs) mass of each. We find that the second moment depends strongly on the broader component of the H$\beta$ line profile. We find that for the NLS1s requiring two Gaussians to fit the H$\beta$ line the mean value of the SMBH mass from the H$\beta$ second moment is larger by about 0.50 dex than that from the full width at half maximum (FWHM). Using the gas velocity dispersion of the core/narrow component of \oiii $\lambda$ 5007 to estimate the stellar velocity dispersion, $\sigma_{*}$, the new mass makes NLS1s fall very close to the $\mbh - \sigma_{*}$ relation for normal AGNs. By using $\sigma_{*}$ measured directly from SDSS spectra with a simple stellar population synthesis method, we find that for NLS1s with mass lower than $10^7 \msun$, they fall only marginally below the $\mbh - \sigma_{*}$ relation considering the large scatter in the mass calculation. TI - A note on black hole masses estimated by the second moment in Narrow Line Seyfert 1 Galaxies KW - blck KW - hole KW - masses KW - spectroscopic AU - Bian, Wei-Hao AU - Hu, Chen AU - Gu, Qiu-Sheng AU - Wang, Jian-Min PY - 2008/Aug/01/ UR - http://arxiv.org/abs/0808.0121 ER -