22 results on '"den Brok, Jakob S."'
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2. Wide-field CO isotopologue emission and the CO-to-H2 factor across the nearby spiral galaxy M101
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den Brok, Jakob S., primary, Bigiel, Frank, additional, Chastenet, Jérémy, additional, Sandstrom, Karin, additional, Leroy, Adam, additional, Usero, Antonio, additional, Schinnerer, Eva, additional, Rosolowsky, Erik W., additional, Koch, Eric W., additional, Chiang, I-Da, additional, Barnes, Ashley T., additional, Puschnig, Johannes, additional, Saito, Toshiki, additional, Bešlić, Ivana, additional, Chevance, Melanie, additional, Dale, Daniel A., additional, Eibensteiner, Cosima, additional, Glover, Simon, additional, Jiménez-Donaire, María J., additional, Teng, Yu-Hsuan, additional, and Williams, Thomas G., additional
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- 2023
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3. The ALMOND Survey: Molecular cloud properties and gas density tracers across 25 nearby spiral galaxies with ALMA
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Neumann, Lukas, primary, Gallagher, Molly J, additional, Bigiel, Frank, additional, Leroy, Adam K, additional, Barnes, Ashley T, additional, Usero, Antonio, additional, den Brok, Jakob S, additional, Belfiore, Francesco, additional, Bešlić, Ivana, additional, Cao, Yixian, additional, Chevance, Mélanie, additional, Dale, Daniel A, additional, Eibensteiner, Cosima, additional, Glover, Simon C O, additional, Grasha, Kathryn, additional, Henshaw, Jonathan D, additional, Jiménez-Donaire, María J, additional, Klessen, Ralf S, additional, Kruijssen, J M Diederik, additional, Liu, Daizhong, additional, Meidt, Sharon, additional, Pety, Jérôme, additional, Puschnig, Johannes, additional, Querejeta, Miguel, additional, Rosolowsky, Erik, additional, Schinnerer, Eva, additional, Schruba, Andreas, additional, Sormani, Mattia C, additional, Sun, Jiayi, additional, Teng, Yu-Hsuan, additional, and Williams, Thomas G, additional
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- 2023
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4. PHANGS–JWST First Results: A Global and Moderately Resolved View of Mid-infrared and CO Line Emission from Galaxies at the Start of the JWST Era
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Leroy, Adam K., primary, Bolatto, Alberto D., additional, Sandstrom, Karin, additional, Rosolowsky, Erik, additional, Barnes, Ashley. T., additional, Bigiel, F., additional, Boquien, Médéric, additional, den Brok, Jakob S., additional, Cao, Yixian, additional, Chastenet, Jérémy, additional, Chevance, Mélanie, additional, Chiang, I-Da, additional, Chown, Ryan, additional, Colombo, Dario, additional, Ellison, Sara L., additional, Emsellem, Eric, additional, Grasha, Kathryn, additional, Henshaw, Jonathan D., additional, Hughes, Annie, additional, Klessen, Ralf S., additional, Koch, Eric W., additional, Kim, Jaeyeon, additional, Kreckel, Kathryn, additional, Kruijssen, J. M. Diederik, additional, Larson, Kirsten L., additional, Lee, Janice C., additional, Levy, Rebecca C., additional, Lin, Lihwai, additional, Liu, Daizhong, additional, Meidt, Sharon E., additional, Pety, Jérôme, additional, Querejeta, Miguel, additional, Rubio, Mónica, additional, Saito, Toshiki, additional, Salim, Samir, additional, Schinnerer, Eva, additional, Sormani, Mattia C., additional, Sun, Jiayi, additional, Thilker, David A., additional, Usero, Antonio, additional, Vogel, Stuart N., additional, Watkins, Elizabeth J., additional, Whitcomb, Cory M., additional, Williams, Thomas G., additional, and Wilson, Christine D., additional
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- 2023
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5. PHANGS–JWST First Results: Stellar-feedback-driven Excitation and Dissociation of Molecular Gas in the Starburst Ring of NGC 1365?
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Liu, Daizhong, primary, Schinnerer, Eva, additional, Cao, Yixian, additional, Leroy, Adam, additional, Usero, Antonio, additional, Rosolowsky, Erik, additional, Kruijssen, J. M. Diederik, additional, Chevance, Mélanie, additional, Glover, Simon C. O., additional, Sormani, Mattia C., additional, Bolatto, Alberto D., additional, Sun, Jiayi, additional, Stuber, Sophia K., additional, Teng, Yu-Hsuan, additional, Bigiel, Frank, additional, Bešlić, Ivana, additional, Grasha, Kathryn, additional, Henshaw, Jonathan D., additional, Barnes, Ashley T., additional, den Brok, Jakob S., additional, Saito, Toshiki, additional, Dale, Daniel A., additional, Watkins, Elizabeth J., additional, Pan, Hsi-An, additional, Klessen, Ralf S., additional, Emsellem, Eric, additional, Anand, Gagandeep S., additional, Deger, Sinan, additional, Egorov, Oleg V., additional, Faesi, Christopher M., additional, Hassani, Hamid, additional, Larson, Kirsten L., additional, Lee, Janice C., additional, Lopez, Laura A., additional, Pety, Jérôme, additional, Sandstrom, Karin, additional, Thilker, David A., additional, Whitmore, Bradley C., additional, and Williams, Thomas G., additional
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- 2023
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6. BASS XXXII: Studying the Nuclear Millimeter-wave Continuum Emission of AGNs with ALMA at Scales ≲100–200 pc
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Kawamuro, Taiki, primary, Ricci, Claudio, additional, Imanishi, Masatoshi, additional, Mushotzky, Richard F., additional, Izumi, Takuma, additional, Ricci, Federica, additional, Bauer, Franz E., additional, Koss, Michael J., additional, Trakhtenbrot, Benny, additional, Ichikawa, Kohei, additional, Rojas, Alejandra F., additional, Smith, Krista Lynne, additional, Shimizu, Taro, additional, Oh, Kyuseok, additional, den Brok, Jakob S., additional, Baba, Shunsuke, additional, Baloković, Mislav, additional, Chang, Chin-Shin, additional, Kakkad, Darshan, additional, Pfeifle, Ryan W., additional, Privon, George C., additional, Temple, Matthew J., additional, Ueda, Yoshihiro, additional, Harrison, Fiona, additional, Powell, Meredith C., additional, Stern, Daniel, additional, Urry, Meg, additional, and Sanders, David B., additional
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- 2022
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7. BASS. XXIX. The Near-infrared View of the Broad-line Region (BLR): The Effects of Obscuration in BLR Characterization*
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Ricci, Federica, Treister, Ezequiel, Bauer, Franz E., Mejia-Restrepo, Julian E., Koss, Michael J., den Brok, Jakob S., Baloković, Mislav, Bär, Rudolf, Bessiere, Patricia, Harrison, Fiona, Ichikawa, Kohei, Kakkad, Darshan, Lamperti, Isabella, Mushotzky, Richard, Oh, Kyuseok, Powell, Meredith C., Privon, George C., Ricci, Claudio, and Riffel, Rogerio
- Abstract
Virial black hole (BH) mass (M (BH)) determination directly involves knowing the broad-line region (BLR) clouds' velocity distribution, their distance from the central supermassive BH (R (BLR)), and the virial factor (f). Understanding whether biases arise in M (BH) estimation with increasing obscuration is possible only by studying a large (N > 100) statistical sample of obscuration-unbiased (hard) X-ray-selected active galactic nuclei (AGNs) in the rest-frame near-infrared (0.8-2.5 mu m) since it penetrates deeper into the BLR than the optical. We present a detailed analysis of 65 local Burst Alert Telescope (BAT) selected Seyfert galaxies observed with Magellan/FIRE. Adding these to the near-infrared BAT AGN spectroscopic survey database, we study a total of 314 unique near-infrared spectra. While the FWHMs of H alpha and near-infrared broad lines (He i, Pa beta, Pa alpha) remain unbiased to either BLR extinction or X-ray obscuration, the H alpha broad-line luminosity is suppressed when N (H) greater than or similar to 10(21) cm(-2), systematically underestimating M (BH) by 0.23-0.46 dex. Near-infrared line luminosities should be preferred to H alpha until N (H) < 10(22) cm(-2), while at higher obscuration a less-biased R (BLR) proxy should be adopted. We estimate f for Seyfert 1 and 2 using two obscuration-unbiased M (BH) measurements, i.e., the stellar velocity dispersion and a BH mass prescription based on near-infrared and X-ray, and find that the virial factors do not depend on the redshift or obscuration, but some broad lines show a mild anticorrelation with M (BH). Our results show the critical impact obscuration can have on BLR characterization and the importance of the near-infrared and X-rays for a less-biased view of the BLR., The Astrophysical Journal. Supplement Series, 261, ISSN:1538-4365, ISSN:0067-0049
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- 2022
8. BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei*
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den Brok, Jakob S., primary, Koss, Michael J., additional, Trakhtenbrot, Benny, additional, Stern, Daniel, additional, Cantalupo, Sebastiano, additional, Lamperti, Isabella, additional, Ricci, Federica, additional, Ricci, Claudio, additional, Oh, Kyuseok, additional, Bauer, Franz E., additional, Riffel, Rogerio, additional, Rodríguez-Ardila, Alberto, additional, Bär, Rudolf, additional, Harrison, Fiona, additional, Ichikawa, Kohei, additional, Mejía-Restrepo, Julian E., additional, Mushotzky, Richard, additional, Powell, Meredith C., additional, Boissay-Malaquin, Rozenn, additional, Stalevski, Marko, additional, Treister, Ezequiel, additional, Urry, C. Megan, additional, and Veilleux, Sylvain, additional
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- 2022
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9. BASS. XXIV. The BASS DR2 Spectroscopic Line Measurements and AGN Demographics
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Oh, Kyuseok, primary, Koss, Michael J., additional, Ueda, Yoshihiro, additional, Stern, Daniel, additional, Ricci, Claudio, additional, Trakhtenbrot, Benny, additional, Powell, Meredith C., additional, den Brok, Jakob S., additional, Lamperti, Isabella, additional, Mushotzky, Richard, additional, Ricci, Federica, additional, Bär, Rudolf E., additional, Rojas, Alejandra F., additional, Ichikawa, Kohei, additional, Riffel, Rogério, additional, Treister, Ezequiel, additional, Harrison, Fiona, additional, Urry, C. Megan, additional, Bauer, Franz E., additional, and Schawinski, Kevin, additional
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- 2022
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10. BASS. XXI. The Data Release 2 Overview
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Koss, Michael J., primary, Trakhtenbrot, Benny, additional, Ricci, Claudio, additional, Bauer, Franz E., additional, Treister, Ezequiel, additional, Mushotzky, Richard, additional, Urry, C. Megan, additional, Ananna, Tonima T., additional, Baloković, Mislav, additional, den Brok, Jakob S., additional, Cenko, S. Bradley, additional, Harrison, Fiona, additional, Ichikawa, Kohei, additional, Lamperti, Isabella, additional, Lein, Amy, additional, Mejía-Restrepo, Julian E., additional, Oh, Kyuseok, additional, Pacucci, Fabio, additional, Pfeifle, Ryan W., additional, Powell, Meredith C., additional, Privon, George C., additional, Ricci, Federica, additional, Salvato, Mara, additional, Schawinski, Kevin, additional, Shimizu, Taro, additional, Smith, Krista L., additional, and Stern, Daniel, additional
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- 2022
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11. BASS. XXII. The BASS DR2 AGN Catalog and Data
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Koss, Michael J., primary, Ricci, Claudio, additional, Trakhtenbrot, Benny, additional, Oh, Kyuseok, additional, den Brok, Jakob S., additional, Mejía-Restrepo, Julian E., additional, Stern, Daniel, additional, Privon, George C., additional, Treister, Ezequiel, additional, Powell, Meredith C., additional, Mushotzky, Richard, additional, Bauer, Franz E., additional, Ananna, Tonima T., additional, Baloković, Mislav, additional, Bär, Rudolf E., additional, Becker, George, additional, Bessiere, Patricia, additional, Burtscher, Leonard, additional, Caglar, Turgay, additional, Congiu, Enrico, additional, Evans, Phil, additional, Harrison, Fiona, additional, Heida, Marianne, additional, Ichikawa, Kohei, additional, Kamraj, Nikita, additional, Lamperti, Isabella, additional, Pacucci, Fabio, additional, Ricci, Federica, additional, Riffel, Rogério, additional, Rojas, Alejandra F., additional, Schawinski, Kevin, additional, Temple, Matthew J., additional, Urry, C. Megan, additional, Veilleux, Sylvain, additional, and Williams, Jonathan, additional
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- 2022
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12. BASS. XXVI. DR2 Host Galaxy Stellar Velocity Dispersions
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Koss, Michael J., primary, Trakhtenbrot, Benny, additional, Ricci, Claudio, additional, Oh, Kyuseok, additional, Bauer, Franz E., additional, Stern, Daniel, additional, Caglar, Turgay, additional, den Brok, Jakob S., additional, Mushotzky, Richard, additional, Ricci, Federica, additional, Mejía-Restrepo, Julian E., additional, Lamperti, Isabella, additional, Treister, Ezequiel, additional, Bär, Rudolf E., additional, Harrison, Fiona, additional, Powell, Meredith C., additional, Privon, George C., additional, Riffel, Rogério, additional, Rojas, Alejandra F., additional, Schawinski, Kevin, additional, and Urry, C. Megan, additional
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- 2022
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13. A CO isotopologue Line Atlas within the Whirlpool galaxy Survey (CLAWS)
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den Brok, Jakob S., primary, Bigiel, Frank, additional, Sliwa, Kazimierz, additional, Saito, Toshiki, additional, Usero, Antonio, additional, Schinnerer, Eva, additional, Leroy, Adam K., additional, Jiménez-Donaire, María J., additional, Rosolowsky, Erik, additional, Barnes, Ashley T., additional, Puschnig, Johannes, additional, Pety, Jérôme, additional, Schruba, Andreas, additional, Bešlić, Ivana, additional, Cao, Yixian, additional, Eibensteiner, Cosima, additional, Glover, Simon C. O., additional, Klessen, Ralf S., additional, Diederik Kruijssen, J. M., additional, Meidt, Sharon E., additional, Neumann, Lukas, additional, Tomičić, Neven, additional, Pan, Hsi-An, additional, Querejeta, Miguel, additional, Watkins, Elizabeth, additional, Williams, Thomas G., additional, and Wilner, David, additional
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- 2022
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14. Low-J CO Line Ratios from Single-dish CO Mapping Surveys and PHANGS-ALMA
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Leroy, Adam K., primary, Rosolowsky, Erik, additional, Usero, Antonio, additional, Sandstrom, Karin, additional, Schinnerer, Eva, additional, Schruba, Andreas, additional, Bolatto, Alberto D., additional, Sun, Jiayi, additional, Barnes, Ashley. T., additional, Belfiore, Francesco, additional, Bigiel, Frank, additional, den Brok, Jakob S., additional, Cao, Yixian, additional, Chiang, I-Da, additional, Chevance, Mélanie, additional, Dale, Daniel A., additional, Eibensteiner, Cosima, additional, Faesi, Christopher M., additional, Glover, Simon C. O., additional, Hughes, Annie, additional, Jiménez Donaire, María J., additional, Klessen, Ralf S., additional, Koch, Eric W., additional, Kruijssen, J. M. Diederik, additional, Liu, Daizhong, additional, Meidt, Sharon E., additional, Pan, Hsi-An, additional, Pety, Jérôme, additional, Puschnig, Johannes, additional, Querejeta, Miguel, additional, Saito, Toshiki, additional, Sardone, Amy, additional, Watkins, Elizabeth J., additional, Weiss, Axel, additional, and Williams, Thomas G., additional
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- 2022
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15. PHANGS–ALMA: Arcsecond CO(2–1) Imaging of Nearby Star-forming Galaxies
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Leroy, Adam K., primary, Schinnerer, Eva, additional, Hughes, Annie, additional, Rosolowsky, Erik, additional, Pety, Jérôme, additional, Schruba, Andreas, additional, Usero, Antonio, additional, Blanc, Guillermo A., additional, Chevance, Mélanie, additional, Emsellem, Eric, additional, Faesi, Christopher M., additional, Herrera, Cinthya N., additional, Liu, Daizhong, additional, Meidt, Sharon E., additional, Querejeta, Miguel, additional, Saito, Toshiki, additional, Sandstrom, Karin M., additional, Sun, Jiayi, additional, Williams, Thomas G., additional, Anand, Gagandeep S., additional, Barnes, Ashley T., additional, Behrens, Erica A., additional, Belfiore, Francesco, additional, Benincasa, Samantha M., additional, Bešlić, Ivana, additional, Bigiel, Frank, additional, Bolatto, Alberto D., additional, den Brok, Jakob S., additional, Cao, Yixian, additional, Chandar, Rupali, additional, Chastenet, Jérémy, additional, Chiang, I-Da, additional, Congiu, Enrico, additional, Dale, Daniel A., additional, Deger, Sinan, additional, Eibensteiner, Cosima, additional, Egorov, Oleg V., additional, García-Rodríguez, Axel, additional, Glover, Simon C. O., additional, Grasha, Kathryn, additional, Henshaw, Jonathan D., additional, Ho, I-Ting, additional, Kepley, Amanda A., additional, Kim, Jaeyeon, additional, Klessen, Ralf S., additional, Kreckel, Kathryn, additional, Koch, Eric W., additional, Kruijssen, J. M. Diederik, additional, Larson, Kirsten L., additional, Lee, Janice C., additional, Lopez, Laura A., additional, Machado, Josh, additional, Mayker, Ness, additional, McElroy, Rebecca, additional, Murphy, Eric J., additional, Ostriker, Eve C., additional, Pan, Hsi-An, additional, Pessa, Ismael, additional, Puschnig, Johannes, additional, Razza, Alessandro, additional, Sánchez-Blázquez, Patricia, additional, Santoro, Francesco, additional, Sardone, Amy, additional, Scheuermann, Fabian, additional, Sliwa, Kazimierz, additional, Sormani, Mattia C., additional, Stuber, Sophia K., additional, Thilker, David A., additional, Turner, Jordan A., additional, Utomo, Dyas, additional, Watkins, Elizabeth J., additional, and Whitmore, Bradley, additional
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- 2021
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16. PHANGS–ALMA Data Processing and Pipeline
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Leroy, Adam K., primary, Hughes, Annie, additional, Liu, Daizhong, additional, Pety, Jérôme, additional, Rosolowsky, Erik, additional, Saito, Toshiki, additional, Schinnerer, Eva, additional, Schruba, Andreas, additional, Usero, Antonio, additional, Faesi, Christopher M., additional, Herrera, Cinthya N., additional, Chevance, Mélanie, additional, Hygate, Alexander P. S., additional, Kepley, Amanda A., additional, Koch, Eric W., additional, Querejeta, Miguel, additional, Sliwa, Kazimierz, additional, Will, David, additional, Wilson, Christine D., additional, Anand, Gagandeep S., additional, Barnes, Ashley, additional, Belfiore, Francesco, additional, Bešlić, Ivana, additional, Bigiel, Frank, additional, Blanc, Guillermo A., additional, Bolatto, Alberto D., additional, Boquien, Médéric, additional, Cao, Yixian, additional, Chandar, Rupali, additional, Chastenet, Jérémy, additional, Chiang, I-Da, additional, Congiu, Enrico, additional, Dale, Daniel A., additional, Deger, Sinan, additional, den Brok, Jakob S., additional, Eibensteiner, Cosima, additional, Emsellem, Eric, additional, García-Rodríguez, Axel, additional, Glover, Simon C. O., additional, Grasha, Kathryn, additional, Groves, Brent, additional, Henshaw, Jonathan D., additional, Jiménez Donaire, María J., additional, Kim, Jaeyeon, additional, Klessen, Ralf S., additional, Kreckel, Kathryn, additional, Kruijssen, J. M. Diederik, additional, Larson, Kirsten L., additional, Lee, Janice C., additional, Mayker, Ness, additional, McElroy, Rebecca, additional, Meidt, Sharon E., additional, Mok, Angus, additional, Pan, Hsi-An, additional, Puschnig, Johannes, additional, Razza, Alessandro, additional, Sánchez-Bl’azquez, Patricia, additional, Sandstrom, Karin M., additional, Santoro, Francesco, additional, Sardone, Amy, additional, Scheuermann, Fabian, additional, Sun, Jiayi, additional, Thilker, David A., additional, Turner, Jordan A., additional, Ubeda, Leonardo, additional, Utomo, Dyas, additional, Watkins, Elizabeth J., additional, and Williams, Thomas G., additional
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- 2021
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17. Probing the AGN unification model at redshift z similar to 3 with MUSE observations of giant Ly alpha nebulae
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den Brok, Jakob S., Cantalupo, Sebastiano, Mackenzie, Ruari, Marino, Raffaella Anna, Pezzulli, Gabriele, Matthee, Jorryt, Johnson, S. D., Krumpe, M., Urrutia, T., and Kollatschny, W.
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Astrophysics::High Energy Astrophysical Phenomena ,active ,Galaxies: high-redshift ,Intergalactic medium ,Quasars: emission lines ,Quasars: general [Galaxies] ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics::Galaxy Astrophysics - Abstract
A prediction of the classic active galactic nucleus (AGN) unification model is the presence of ionization cones with different orientations depending on the AGN type. Confirmations of this model exist for present times, but it is less clear in the early Universe. Here, we use the morphology of giant Ly alpha nebulae around AGNs at redshift z similar to 3 to probe AGN emission and therefore the validity of the AGN unification model at this redshift. We compare the spatial morphology of 19 nebulae previously found around type I AGNs with a new sample of four Ly alpha nebulae detected around type II AGNs. Using two independent techniques, we find that nebulae around type II AGNs are more asymmetric than around type I, at least at radial distances r > 30 physical kpc (pkpc) from the ionizing source. We conclude that the type I and type II AGNs in our sample show evidence of different surrounding ionizing geometries. This suggests that the classical AGN unification model is also valid for highredshift sources. Finally, we discuss how the lack of asymmetry in the inner parts (r less than or similar to 30 pkpc) and the associated high values of the He II to Ly alpha ratios in these regions could indicate additional sources of (hard) ionizing radiation originating within or in proximity of the AGN host galaxies. This work demonstrates that the morphologies of giant Ly alpha nebulae can be used to understand and study the geometry of high-redshift AGNs on circumnuclear scales and it lays the foundation for future studies using much larger statistical samples. ISSN:0035-8711 ISSN:1365-2966
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- 2020
18. BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei
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'den Brok, Jakob S.
19. A CO isotopologue Line Atlas within the Whirlpool galaxy Survey (CLAWS)
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'den Brok, Jakob S.
20. BASS. XXIX. The Near-infrared View of the Broad-line Region (BLR): The Effects of Obscuration in BLR Characterization*
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Federica Ricci, Ezequiel Treister, Franz E. Bauer, Julian E. Mejía-Restrepo, Michael J. Koss, Jakob S. den Brok, Mislav Baloković, Rudolf Bär, Patricia Bessiere, Turgay Caglar, Fiona Harrison, Kohei Ichikawa, Darshan Kakkad, Isabella Lamperti, Richard Mushotzky, Kyuseok Oh, Meredith C. Powell, George C. Privon, Claudio Ricci, Rogerio Riffel, Alejandra F. Rojas, Eleonora Sani, Krista L. Smith, Daniel Stern, Benny Trakhtenbrot, C. Megan Urry, Sylvain Veilleux, Ricci, Federica, Treister, Ezequiel, Bauer, Franz E., Mejia-Restrepo, Julian E., Koss, Michael J., den Brok, Jakob S., Balokovic, Mislav, Baer, Rudolf, Bessiere, Patricia, Caglar, Turgay, Harrison, Fiona, Ichikawa, Kohei, Kakkad, Darshan, Lamperti, Isabella, Mushotzky, Richard, Oh, Kyuseok, Powell, Meredith C., Privon, George C., Ricci, Claudio, Riffel, Rogerio, Rojas, Alejandra F., Sani, Eleonora, Smith, Krista L., Stern, Daniel, Trakhtenbrot, Benny, Megan Urry, C., and Veilleux, Sylvain
- Subjects
Active galactic nuclei ,X-ray active galactic nuclei ,Space and Planetary Science ,Astrophysics - astrophysics of galaxies ,Active galaxies ,Astronomy and Astrophysics ,High energy astrophysics - Abstract
Virial black hole (BH) mass (M BH) determination directly involves knowing the broad-line region (BLR) clouds’ velocity distribution, their distance from the central supermassive BH (R BLR), and the virial factor (f). Understanding whether biases arise in M BH estimation with increasing obscuration is possible only by studying a large (N > 100) statistical sample of obscuration-unbiased (hard) X-ray-selected active galactic nuclei (AGNs) in the rest-frame near-infrared (0.8–2.5 μm) since it penetrates deeper into the BLR than the optical. We present a detailed analysis of 65 local Burst Alert Telescope (BAT) selected Seyfert galaxies observed with Magellan/FIRE. Adding these to the near-infrared BAT AGN spectroscopic survey database, we study a total of 314 unique near-infrared spectra. While the FWHMs of Hα and near-infrared broad lines (He i, Paβ, Paα) remain unbiased to either BLR extinction or X-ray obscuration, the Hα broad-line luminosity is suppressed when N H ≳ 1021 cm−2, systematically underestimating M BH by 0.23–0.46 dex. Near-infrared line luminosities should be preferred to Hα until N H < 1022 cm−2, while at higher obscuration a less-biased R BLR proxy should be adopted. We estimate f for Seyfert 1 and 2 using two obscuration-unbiased M BH measurements, i.e., the stellar velocity dispersion and a BH mass prescription based on near-infrared and X-ray, and find that the virial factors do not depend on the redshift or obscuration, but some broad lines show a mild anticorrelation with M BH. Our results show the critical impact obscuration can have on BLR characterization and the importance of the near-infrared and X-rays for a less-biased view of the BLR.
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- 2022
21. BASS XXIV: The BASS DR2 Spectroscopic Line Measurements and AGN Demographics
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Kyuseok Oh, Michael J. Koss, Yoshihiro Ueda, Daniel Stern, Claudio Ricci, Benny Trakhtenbrot, Meredith C. Powell, Jakob S. den Brok, Isabella Lamperti, Richard Mushotzky, Federica Ricci, Rudolf E. Bär, Alejandra F. Rojas, Kohei Ichikawa, Rogério Riffel, Ezequiel Treister, Fiona Harrison, C. Megan Urry, Franz E. Bauer, Kevin Schawinski, Oh, Kyuseok, Koss, Michael J., Ueda, Yoshihiro, Stern, Daniel, Ricci, Claudio, Trakhtenbrot, Benny, Powell, Meredith C., den Brok, Jakob S., Lamperti, Isabella, Mushotzky, Richard, Ricci, Federica, Baer, Rudolf E., Rojas, Alejandra F., Ichikawa, Kohei, Riffel, Rogerio, Treister, Ezequiel, Harrison, Fiona, Megan Urry, C., Bauer, Franz E., and Schawinski, Kevin
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Space and Planetary Science ,Astrophysics::High Energy Astrophysical Phenomena ,Astrophysics of Galaxies (astro-ph.GA) ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Astrophysics::Galaxy Astrophysics - Abstract
We present the second catalog and data release of optical spectral line measurements and active galactic nucleus (AGN) demographics of the BAT AGN Spectroscopic Survey, which focuses on the Swift-BAT hard X-ray detected AGNs. We use spectra from dedicated campaigns and publicly available archives to investigate spectral properties of most of the AGNs listed in the 70 month Swift-BAT all-sky catalog; specifically, 743 of the 746 unbeamed and unlensed AGNs (99.6%). We find a good correspondence between the optical emission line widths and the hydrogen column density distributions using the X-ray spectra, with a clear dichotomy of AGN types for N (H) = 10(22) cm(-2). Based on optical emission-line diagnostics, we show that 48%-75% of BAT AGNs are classified as Seyfert, depending on the choice of emission lines used in the diagnostics. The fraction of objects with upper limits on line emission varies from 6% to 20%. Roughly 4% of the BAT AGNs have lines too weak to be placed on the most commonly used diagnostic diagram, [O iii]lambda 5007/H beta versus [N ii]lambda 6584/H alpha, despite the high signal-to-noise ratio of their spectra. This value increases to 35% in the [O iii]lambda 5007/[O ii]lambda 3727 diagram, owing to difficulties in line detection. Compared to optically selected narrow-line AGNs in the Sloan Digital Sky Survey, the BAT narrow-line AGNs have a higher rate of reddening/extinction, with H alpha/H beta > 5 (similar to 36%), indicating that hard X-ray selection more effectively detects obscured AGNs from the underlying AGN population. Finally, we present a subpopulation of AGNs that feature complex broad lines (34%, 250/743) or double-peaked narrow emission lines (2%, 17/743)., The Astrophysical Journal. Supplement Series, 261 (1), ISSN:1538-4365, ISSN:0067-0049
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- 2022
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22. BASS XXXII: Studying the Nuclear Millimeter-wave Continuum Emission of AGNs with ALMA at Scales ≲100–200 pc
- Author
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Taiki Kawamuro, Claudio Ricci, Masatoshi Imanishi, Richard F. Mushotzky, Takuma Izumi, Federica Ricci, Franz E. Bauer, Michael J. Koss, Benny Trakhtenbrot, Kohei Ichikawa, Alejandra F. Rojas, Krista Lynne Smith, Taro Shimizu, Kyuseok Oh, Jakob S. den Brok, Shunsuke Baba, Mislav Baloković, Chin-Shin Chang, Darshan Kakkad, Ryan W. Pfeifle, George C. Privon, Matthew J. Temple, Yoshihiro Ueda, Fiona Harrison, Meredith C. Powell, Daniel Stern, Meg Urry, David B. Sanders, Kawamuro, Taiki, Ricci, Claudio, Imanishi, Masatoshi, Mushotzky, Richard F., Izumi, Takuma, Ricci, Federica, Bauer, Franz E., Koss, Michael J., Trakhtenbrot, Benny, Ichikawa, Kohei, Rojas, Alejandra F., Lynne Smith, Krista, Shimizu, Taro, Oh, Kyuseok, den Brok, Jakob S., Baba, Shunsuke, Balokovi??, Mislav, Chang, Chin-Shin, Kakkad, Darshan, Pfeifle, Ryan W., Privon, George C., Temple, Matthew J., Ueda, Yoshihiro, Harrison, Fiona, Powell, Meredith C., Stern, Daniel, Urry, Meg, and Sanders, David B.
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Space and Planetary Science ,Astronomy and Astrophysics - Abstract
To understand the origin of nuclear (≲100 pc) millimeter-wave (mm-wave) continuum emission in active galactic nuclei (AGNs), we systematically analyzed subarcsecond resolution Band-6 (211–275 GHz) Atacama Large Millimeter/submillimeter Array data of 98 nearby AGNs (z < 0.05) from the 70 month Swift/BAT catalog. The sample, almost unbiased for obscured systems, provides the largest number of AGNs to date with high mm-wave spatial resolution sampling (∼1–200 pc), and spans broad ranges of 14–150 keV luminosity {$40\lt \mathrm{log}[{L}_{14-150}/(\mathrm{erg}\,{{\rm{s}}}^{-1})]\lt 45$}, black hole mass $[5\lt \mathrm{log}({M}_{\mathrm{BH}}/{M}_{\odot })\lt 10$], and Eddington ratio ($-4\lt \mathrm{log}{\lambda }_{\mathrm{Edd}}\lt 2$). We find a significant correlation between 1.3 mm (230 GHz) and 14–150 keV luminosities. Its scatter is ≈0.36 dex, and the mm-wave emission may serve as a good proxy of the AGN luminosity, free of dust extinction up to NH ∼ 1026 cm−2. While the mm-wave emission could be self-absorbed synchrotron radiation around the X-ray corona according to past works, we also discuss different possible origins of the mm-wave emission: AGN-related dust emission, outflow-driven shocks, and a small-scale (, The Astrophysical Journal, 938 (1), ISSN:0004-637X, ISSN:2041-8213
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