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23 results on '"Nyland, K. E."'

1. PEARLS: JWST counterparts of micro-Jy radio sources in the Time Domain Field

Author

Willner, S. P., Gim, H. B., Polletta, M. del Carmen, Cohen, S. H., Willmer, C. N. A., Zhao, X., D'Silva, J. C. J., Jansen, R. A., Koekemoer, A. M., Summers, J., Windhorst, R. A., Coe, D., Conselice, C. J., Driver, S. P., Frye, B., Grogin, N. A., Marshall, M. A., Nonino, M., Ortiz III, R., Pirzkal, N., Robotham, A., Rutkowski, M. J., Ryan, Jr., R. E., Tompkins, S., Yan, H., Hammel, H. B., Milam, S. N., Adams, N. J., Beacom, J. F., Bhatawdekar, R., Cheng, C., Civano, F., Cotton, W., Hyun, M., Kikuta, S., Nyland, K. E., Peters, W. M., Petric, A., Röttgering, H. J. A., Shimwell, T., and Yun, M. S.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

The Time Domain Field (TDF) near the North Ecliptic Pole in JWST's continuous-viewing zone will become a premier "blank field" for extragalactic science. JWST/NIRCam data in a 16 arcmin$^2$ portion of the TDF identify 4.4 $\mu$m counterparts for 62 of 63 3 GHz sources with S(3 GHz) > 5 {\mu}Jy. The one unidentified radio source may be a lobe of a nearby Seyfert galaxy, or it may be an infrared-faint radio source. The bulk properties of the radio-host galaxies are consistent with those found by previous work: redshifts range from 0.14 to 4.4 with a median redshift of 1.33. The radio emission arises primarily from star formation in $\sim 2/3$ of the sample and from an active galactic nucleus in $\sim 1/3$, but just over half the sample shows evidence for an AGN either in the spectral energy distribution or by radio excess. All but three counterparts are brighter than magnitude 23 AB at 4.4 $\mu$m, and the exquisite resolution of JWST identifies correct counterparts for sources for which observations with lower angular resolution would mis-identify a nearby bright source as the counterpart when the correct one is faint and red. Up to 11% of counterparts might have been unidentified or misidentified absent NIRCam observations., Comment: Accepted for publication in ApJ. V2 adds an author and some acknowledgments inadvertently omitted

Published
2023

2. Accessing Intermediate-Mass Black Holes in 728 Globular Star Clusters in NGC\,4472

Author

Wrobel, J. M., Maccarone, T. J., Miller-Jones, J. C. A., and Nyland, K. E.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Intermediate-mass black holes (IMBHs) by definition have masses of $M_{\rm IMBH} \sim 10^{2-5}~M_\odot$, a range with few observational constraints. Finding IMBHs in globular star clusters (GCs) would validate a formation channel for massive black-hole seeds in the early universe. Here, we simulate a 60-hour observation with the next-generation Very Large Array (ngVLA) of 728 GC candidates in the Virgo Cluster galaxy NGC\,4472. Interpreting the radio detection thresholds as signatures of accretion onto IMBHs, we benchmark IMBH mass thresholds in three scenarios and find the following: (1) Radio analogs of ESO\,243-49 HLX-1, a strong IMBH candidate with $M_{\rm IMBH}^{\rm HLX} \sim 10^{4-5}~M_\odot$ in a star cluster, are easy to access in all 728 GC candidates. (2) For the 30 GC candidates with extant X-ray detections, the empirical fundamental-plane relation involving black hole mass plus X-ray and radio luminosities suggests access to $M_{\rm IMBH}^{\rm FP} \sim 10^{1.7-3.6}~M_\odot$, with an uncertainty of 0.44 dex. (3) A fiducial Bondi accretion model was applied to all 728 GC candidates and to radio stacks of GC candidates. This model suggests access to IMBH masses, with a statistical uncertainty of 0.39 dex, of $M_{\rm IMBH}^{\rm B} \sim 10^{4.9-5.1}~M_\odot$ for individual GC candidates and $M_{\rm IMBH}^{\rm B,stack} \sim 10^{4.5}~M_\odot$ for radio stacks of about 100-200 GC candidates. The fiducial Bondi model offers initial guidance, but is subject to additional systematic uncertainties and should be superseded by hydrodynamical simulations of gas flows in GCs., Comment: 8 pages, 6 figures, accepted 2021 June 25 by ApJ

Published
2021
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3. VLA Limits on Intermediate-Mass Black Holes in 19 Massive Globular Clusters

Author

Wrobel, J. M. and Nyland, K. E.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

The NSF's Karl G.\ Jansky Very Large Array (VLA) was used at 3~cm to search for accretion signatures from intermediate-mass black holes (IMBHs) in 19 globular star clusters (GCs) in NGC\,3115, an early-type galaxy at a distance of 9.4 Mpc. The 19 have stellar masses $M_{\star} \sim (1.1 - 2.7) \times 10^6~M_\odot$, with a mean $\overline{M_{\star}} \sim 1.8 \times 10^6~M_\odot$. None were detected. An IMBH accretion model was applied to the individual GCs and their radio stack. The radio-stacked GCs have an IMBH mass $\overline{M_{\rm IMBH}} < 1.7 \times 10^5~M_\odot$ and mass fraction $\overline{M_{\rm IMBH}} / \overline{M_{\star}} < 9.5\%$, with each limit being uncertain by a factor of about 2.5. The latter limit contrasts with the extremes of some stripped nuclei, suggesting that the set of stacked GCs in NGC\,3115 is not a set of such nuclei. The radio luminosities of the individual GCs correspond to X-ray luminosities $L_{\rm X} < (3.3 - 10) \times 10^{38}$ erg~s$^{-1}$, with a factor of about 2.5 uncertainty. These limits predicted for putative IMBHs in the GCs are consistent with extant {\em Chandra} observations. Finally, a simulated observation with a next-generation VLA (ngVLA) demonstrates that accretion signatures from IMBHs in GCs can be detected in a radio-only search, yet elude detection in an X-ray-only search due to confusion from X-ray binaries in the GCs., Comment: 8 pages, 4 figures, accepted 2020 July 22 by ApJ

Published
2020

4. Intermediate-Mass Black Holes in Globular Cluster Systems

Author

Wrobel, J. M., Miller-Jones, J. C. A., Nyland, K. E., and Maccarone, T. J.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Using the Next Generation Very Large Array (ngVLA), we will make a comprehensive inventory of intermediate-mass black holes (IMBHs) in hundreds of globular cluster systems out to a distance of 25 Mpc. IMBHs have masses of about 100 to 100,000 solar masses. Finding them in globular clusters would validate a formation channel for seed black holes in the early universe and inform event predictions for gravitational wave facilities. Reaching a large number of globular clusters is key, as Fragione et al. (2018) predict that only a few percent will have retained their gravitational-wave fostering IMBHs., Comment: An ngVLA Science Book chapter; 8 pages; 3 figures

Published
2018

5. A Stacked Search for Intermediate-Mass Black Holes in 337 Extragalactic Star Clusters

Author

Wrobel, J. M., Nyland, K. E., and Miller-Jones, J. C. A.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Forbes et al. recently used the Hubble Space Telescope to localize hundreds of candidate star clusters in NGC 1023, an early-type galaxy at a distance of 11.1 Mpc. Old stars dominate the light of 92% of the clusters and intermediate-age stars dominate the light of the remaining 8%. Theory predicts that clusters with such ages can host intermediate-mass black holes (IMBHs) with masses M_BH \lesssim 10^5 M_sun. To investigate this prediction, we used 264 s of 5.5 GHz data from the Karl G. Jansky Very Large Array (VLA) to search for the radiative signatures of IMBH accretion from 337 candidate clusters in an image spanning 492 arcsec (26 kpc) with a resolution of 0.40 arcsec (22 pc). None of the individual clusters are detected, nor are weighted-mean image stacks of the 311 old clusters, the 26 intermediate-age clusters, and the 20 clusters with stellar masses M_star \gtrsim 7.5 x 10^5 M_sun. The clusters thus lack radio analogs of HLX-1, a strong IMBH candidate in a cluster in the early-type galaxy ESO 243-49. This suggests that HLX-1 is accreting gas related to its cluster's light-dominating young stars. Alternatively, the HLX-1 phenomenon could be so rare that no radio analog is expected in NGC 1023. Also, using a formalism heretofore applied to star clusters in the Milky Way, the radio-luminosity upper limit for the massive-cluster stack corresponds to a mean 3$\sigma$ IMBH mass of M_BH(massive) < 2.3 x 10^5 M_sun, suggesting mean black-hole mass fractions of M_BH(massive)/M_star < 0.05-0.29., Comment: 19 pages; 6 figures; accepted by AJ

Published
2015
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6. Quenching of Star Formation in Molecular Outflow Host NGC 1266

Author

Alatalo, K., Nyland, K. E., Graves, G., Deustua, S., Young, L. M., Davis, T. A., Bureau, M., Bayet, E., Blitz, L., Bois, M., Bournaud, F., Cappellari, M., Davies, R. L., de Zeeuw, P. T., Emsellem, E., Khochfar, S., Krajnovic, D., Kuntschner, H., McDermid, R. M., Morganti, R., Naab, T., Oosterloo, T., Sarzi, M., Scott, N., Serra, P., and Weijmans, A.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We detail the rich molecular story of NGC 1266, its serendipitous discovery within the ATLAS3D survey (Cappellari et al. 2011) and how it plays host to an AGN-driven molecular outflow, potentially quenching all of its star formation (SF) within the next 100 Myr. While major mergers appear to play a role in instigating outflows in other systems, deep imaging of NGC 1266 as well as stellar kinematic observations from SAURON, have failed to provide evidence that NGC 1266 has recently been involved in a major interaction. The molecular gas and the instantaneous SF tracers indicate that the current sites of star formation are located in a hypercompact disk within 200 pc of the nucleus (Fig. 1; SF rate ~ 2 Msuns/yr). On the other hand, tracers of recent star formation, such as the H{\beta} absorption map from SAURON and stellar population analysis show that the young stars are distributed throughout a larger area of the galaxy than current star formation. As the AGN at the center of NGC 1266 continues to drive cold gas out of the galaxy, we expect star formation rates to decline as the star formation is ultimately quenched. Thus, NGC 1266 is in the midst of a key portion of its evolution and continued studies of this unique galaxy may help improve our understanding of how galaxies transition from the blue to the red sequence (Alatalo et al. 2011)., Comment: 1 page, Proceedings IAU symposium No. 292: Molecular gas, dust and star formation in galaxies, ed. by Tony Wong and Juergen Ott

Published
2012
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7. AGN Feedback Driven Molecular Outflow in NGC 1266

Author

Alatalo, K., Nyland, K. E., Graves, G., Deustua, S., Wrobel, J., Young, L. M., Davis, T. A., Bureau, M., Bayet, E., Blitz, L., Bois, M., Bournaud, F., Cappellari, M., Davies, R. L., de Zeeuw, P. T., Emsellem, E., Khochfar, S., Krajnovic, D., Kuntschner, H., Martin, S., McDermid, R. M., Morganti, R., Naab, T., Oosterloo, T., Sarzi, M., Scott, N., Serra, P., and Weijmans, A.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

NGC 1266 is a nearby field galaxy observed as part of the ATLAS3D survey (Cappellari et al. 2011). NGC 1266 has been shown to host a compact (< 200 pc) molecular disk and a mass-loaded molecular outflow driven by the AGN (Alatalo et al. 2011). Very Long Basline Array (VLBA) observations at 1.65 GHz revealed a compact (diameter < 1.2 pc), high bright- ness temperature continuum source most consistent with a low-level AGN origin. The VLBA continuum source is positioned at the center of the molecular disk and may be responsible for the expulsion of molecular gas in NGC 1266. Thus, the candidate AGN-driven molecular outflow in NGC 1266 supports the picture in which AGNs do play a significant role in the quenching of star formation and ultimately the evolution of the red sequence of galaxies., Comment: 2 pages, Proceedings from IAU Symposium 290: Feeding compact objects, Accretion on all scales

Published
2012
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8. PEARLS: JWST Counterparts of Microjansky Radio Sources in the Time Domain Field

Author

Willner, S. P., primary, Gim, Hansung B., additional, del Carmen Polletta, Maria, additional, Cohen, Seth H., additional, Willmer, Christopher N. A., additional, Zhao, Xiurui, additional, D’Silva, Jordan C. J., additional, Jansen, Rolf A., additional, Koekemoer, Anton M., additional, Summers, Jake, additional, Windhorst, Rogier A., additional, Coe, Dan, additional, Conselice, Christopher J., additional, Driver, Simon P., additional, Frye, Brenda, additional, Grogin, Norman A., additional, Marshall, Madeline A., additional, Nonino, Mario, additional, Ortiz, Rafael, additional, Pirzkal, Nor, additional, Robotham, Aaron, additional, Rutkowski, Michael J., additional, Ryan, Russell E., additional, Tompkins, Scott, additional, Yan, Haojing, additional, Hammel, Heidi B., additional, Milam, Stefanie N., additional, Adams, Nathan J., additional, Beacom, John F., additional, Bhatawdekar, Rachana, additional, Cheng, Cheng, additional, Civano, F., additional, Cotton, W., additional, Hyun, Minhee, additional, Kikuta, Satoshi, additional, Nyland, K. E., additional, Peters, W. M., additional, Petric, Andreea, additional, Röttgering, Huub J. A., additional, Shimwell, T., additional, and Yun, Min S., additional

Published
2023
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9. The Arctic

Author

Thoman, Richard L., primary, Druckenmiller, Matthew L., additional, Moon, Twila A., additional, Andreassen, L. M., additional, Baker, E., additional, Ballinger, Thomas J., additional, Berner, Logan T., additional, Bernhard, Germar H., additional, Bhatt, Uma S., additional, Bjerke, Jarle W., additional, Boisvert, L.N., additional, Box, Jason E., additional, Brettschneider, B., additional, Burgess, D., additional, Butler, Amy H., additional, Cappelen, John, additional, Christiansen, Hanne H., additional, Decharme, B., additional, Derksen, C., additional, Divine, Dmitry, additional, Drozdov, D. S., additional, Elias, Chereque A., additional, Epstein, Howard E., additional, Farrell, Sinead L., additional, Fausto, Robert S., additional, Fettweis, Xavier, additional, Fioletov, Vitali E., additional, Forbes, Bruce C., additional, Frost, Gerald V., additional, Gerland, Sebastian, additional, Goetz, Scott J., additional, Grooß, Jens-Uwe, additional, Haas, Christian, additional, Hanna, Edward, additional, Hanssen, -Bauer Inger, additional, Heijmans, M. M. P. D., additional, Hendricks, Stefan, additional, Ialongo, Iolanda, additional, Isaksen, K., additional, Jensen, C. D., additional, Johnsen, Bjørn, additional, Kaleschke, L., additional, Kholodov, A. L., additional, Kim, Seong-Joong, additional, Kohler, J., additional, Korsgaard, Niels J., additional, Labe, Zachary, additional, Lakkala, Kaisa, additional, Lara, Mark J., additional, Lee, Simon H., additional, Loomis, Bryant, additional, Luks, B., additional, Luojus, K., additional, Macander, Matthew J., additional, Magnússon, R. Í, additional, Malkova, G. V., additional, Mankoff, Kenneth D., additional, Manney, Gloria L., additional, Meier, Walter N., additional, Mote, Thomas, additional, Mudryk, Lawrence, additional, Müller, Rolf, additional, Nyland, K. E., additional, Overland, James E., additional, Pálsson, F., additional, Park, T., additional, Parker, C. L., additional, Perovich, Don, additional, Petty, Alek, additional, Phoenix, Gareth K., additional, Pinzon, J. E., additional, Ricker, Robert, additional, Romanovsky, Vladimir E., additional, Serbin, S. P., additional, Sheffield, G., additional, Shiklomanov, Nikolai I., additional, Smith, Sharon L., additional, Stafford, K. M., additional, Steer, A., additional, Streletskiy, Dimitri A., additional, Svendby, Tove, additional, Tedesco, Marco, additional, Thomson, L., additional, Thorsteinsson, T., additional, Tian-Kunze, X., additional, Timmermans, Mary-Louise, additional, Tømmervik, Hans, additional, Tschudi, Mark, additional, Tucker, C. J., additional, Walker, Donald A., additional, Walsh, John E., additional, Wang, Muyin, additional, Webster, Melinda, additional, Wehrlé, A., additional, Winton, Øyvind, additional, Wolken, G., additional, Wood, K., additional, Wouters, B., additional, and Yang, D., additional

Published
2022
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10. The Arctic

Author

Druckenmiller, Matthew L., Moon, Twila A., Thoman, Richard L., Ballinger, Thomas J., Berner, Logan T., Bernhard, Germar H., Bhatt, Uma S., Bjerke, Jarle W., Box, Jason E., Brown, R., Cappelen, John, Christiansen, Hanne H., Decharme, B., Derksen, C., Divine, Dmitry, Drozdov, D. S., Elias Chereque, A., Epstein, Howard E., Farquharson, L. M., Farrell, Sinead L., Fausto, Robert S., Fettweis, Xavier, Fioletov, Vitali E., Forbes, Bruce C., Frost, Gerald V., Gargulinski, Emily, Gerland, Sebastian, Goetz, Scott J., Grabinski, Z., Grooß, Jens-Uwe, Haas, Christian, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Holmes, Robert M., Ialongo, Iolanda, Isaksen, K., Jain, Piyush, Johnsen, Bjørn, Kaleschke, L., Kholodov, A. L., Kim, Seong-Joong, Korsgaard, Niels J., Labe, Zachary, Lakkala, Kaisa, Lara, Mark J., Loomis, Bryant, Luojus, K., Macander, Matthew J., Malkova, G. V., Mankoff, Kenneth D., Manney, Gloria L., McClelland, James W., Meier, Walter N., Mote, Thomas, Mudryk, L., Müller, Rolf, Nyland, K. E., Overland, James E., Park, T., Pavlova, Olga, Perovich, Don, Petty, Alek, Phoenix, Gareth K., Raynolds, Martha K., Reijmer, C. H., Richter-Menge, Jacqueline, Ricker, Robert, Romanovsky, Vladimir E., Scott, Lindsay, Shapiro, Hazel, Shiklomanov, Alexander I., Shiklomanov, Nikolai I., Smeets, C. J. P. P., Smith, Sharon L., Soja, Amber, Spencer, Robert G. M., Starkweather, Sandy, Streletskiy, Dimitri A., Suslova, Anya, Svendby, Tove, Tank, Suzanne E., Tedesco, Marco, Tian-Kunze, X., Timmermans, Mary-Louise, Tømmervik, Hans, Tretiakov, Mikhail, Tschudi, Mark, Vakhutinsky, Sofia, van As, Dirk, van de Wal, R. S. W., Veraverbeke, Sander, Walker, Donald A., Walsh, John E., Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wood, K., York, Alison, Ziel, Robert, Sub Dynamics Meteorology, Proceskunde, Sub Algemeen Marine & Atmospheric Res, Marine and Atmospheric Research, Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, 0211 other engineering and technologies, Greenland ice sheet, 02 engineering and technology, [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology, 01 natural sciences, [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, Climatology, Taverne, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, Geology, ComputingMilieux_MISCELLANEOUS, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences
Abstract

International audience

Published
2021
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12. The Arctic

Author

Sub Dynamics Meteorology, Proceskunde, Sub Algemeen Marine & Atmospheric Res, Marine and Atmospheric Research, Druckenmiller, Matthew L., Moon, Twila A., Thoman, Richard L., Ballinger, Thomas J., Berner, Logan T., Bernhard, Germar H., Bhatt, Uma S., Bjerke, Jarle W., Box, Jason E., Brown, R., Cappelen, John, Christiansen, Hanne H., Decharme, B., Derksen, C., Divine, Dmitry, Drozdov, D. S., Elias Chereque, A., Epstein, Howard E., Farquharson, L. M., Farrell, Sinead L., Fausto, Robert S., Fettweis, Xavier, Fioletov, Vitali E., Forbes, Bruce C., Frost, Gerald V., Gargulinski, Emily, Gerland, Sebastian, Goetz, Scott J., Grabinski, Z., Grooß, Jens-Uwe, Haas, Christian, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Holmes, Robert M., Ialongo, Iolanda, Isaksen, K., Jain, Piyush, Johnsen, Bjørn, Kaleschke, L., Kholodov, A. L., Kim, Seong-Joong, Korsgaard, Niels J., Labe, Zachary, Lakkala, Kaisa, Lara, Mark J., Loomis, Bryant, Luojus, K., Macander, Matthew J., Malkova, G. V., Mankoff, Kenneth D., Manney, Gloria L., McClelland, James W., Meier, Walter N., Mote, Thomas, Mudryk, L., Müller, Rolf, Nyland, K. E., Overland, James E., Park, T., Pavlova, Olga, Perovich, Don, Petty, Alek, Phoenix, Gareth K., Raynolds, Martha K., Reijmer, C. H., Richter-Menge, Jacqueline, Ricker, Robert, Romanovsky, Vladimir E., Scott, Lindsay, Shapiro, Hazel, Shiklomanov, Alexander I., Shiklomanov, Nikolai I., Smeets, C. J. P. P., Smith, Sharon L., Soja, Amber, Spencer, Robert G. M., Starkweather, Sandy, Streletskiy, Dimitri A., Suslova, Anya, Svendby, Tove, Tank, Suzanne E., Tedesco, Marco, Tian-Kunze, X., Timmermans, Mary-Louise, Tømmervik, Hans, Tretiakov, Mikhail, Tschudi, Mark, Vakhutinsky, Sofia, van As, Dirk, van de Wal, R. S. W., Veraverbeke, Sander, Walker, Donald A., Walsh, John E., Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wood, K., York, Alison, Ziel, Robert, Sub Dynamics Meteorology, Proceskunde, Sub Algemeen Marine & Atmospheric Res, Marine and Atmospheric Research, Druckenmiller, Matthew L., Moon, Twila A., Thoman, Richard L., Ballinger, Thomas J., Berner, Logan T., Bernhard, Germar H., Bhatt, Uma S., Bjerke, Jarle W., Box, Jason E., Brown, R., Cappelen, John, Christiansen, Hanne H., Decharme, B., Derksen, C., Divine, Dmitry, Drozdov, D. S., Elias Chereque, A., Epstein, Howard E., Farquharson, L. M., Farrell, Sinead L., Fausto, Robert S., Fettweis, Xavier, Fioletov, Vitali E., Forbes, Bruce C., Frost, Gerald V., Gargulinski, Emily, Gerland, Sebastian, Goetz, Scott J., Grabinski, Z., Grooß, Jens-Uwe, Haas, Christian, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Holmes, Robert M., Ialongo, Iolanda, Isaksen, K., Jain, Piyush, Johnsen, Bjørn, Kaleschke, L., Kholodov, A. L., Kim, Seong-Joong, Korsgaard, Niels J., Labe, Zachary, Lakkala, Kaisa, Lara, Mark J., Loomis, Bryant, Luojus, K., Macander, Matthew J., Malkova, G. V., Mankoff, Kenneth D., Manney, Gloria L., McClelland, James W., Meier, Walter N., Mote, Thomas, Mudryk, L., Müller, Rolf, Nyland, K. E., Overland, James E., Park, T., Pavlova, Olga, Perovich, Don, Petty, Alek, Phoenix, Gareth K., Raynolds, Martha K., Reijmer, C. H., Richter-Menge, Jacqueline, Ricker, Robert, Romanovsky, Vladimir E., Scott, Lindsay, Shapiro, Hazel, Shiklomanov, Alexander I., Shiklomanov, Nikolai I., Smeets, C. J. P. P., Smith, Sharon L., Soja, Amber, Spencer, Robert G. M., Starkweather, Sandy, Streletskiy, Dimitri A., Suslova, Anya, Svendby, Tove, Tank, Suzanne E., Tedesco, Marco, Tian-Kunze, X., Timmermans, Mary-Louise, Tømmervik, Hans, Tretiakov, Mikhail, Tschudi, Mark, Vakhutinsky, Sofia, van As, Dirk, van de Wal, R. S. W., Veraverbeke, Sander, Walker, Donald A., Walsh, John E., Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wood, K., York, Alison, and Ziel, Robert

Published
2021

13. The Arctic

Author

Andersen, J K, Andreassen, Liss M, Baker, Emily H, Ballinger, Thomas J, Berner, Logan T, Bernhard, Germar H, Bhatt, Uma S, Bjerke, Jarle W, Box, Jason E, Britt, L, Brown, R, Burgess, David, Cappelen, John, Christiansen, Hanne H, Decharme, B, Derksen, C, Drozdov, D S, Epstein, Howard E, Farquharson, L M, Farrell, Sinead L, Fausto, Robert S, Fettweis, Xavier, Fioletov, Vitali E, Forbes, Bruce C, Frost, Gerald V, Gerland, Sebastian, Goetz, Scott J, Grooß, Jens-Uwe, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Ialongo, Iolanda, Isaksen, K, Johnsen, Bjørn, Kaleschke, L, Kholodov, A L, Kim, Seong-Joong, Kohler, Jack, Labe, Zachary, Ladd, Carol, Lakkala, Kaisa, Lara, Mark J, Loomis Bryant andLuks, Bartlomiej, Luojus, K, Macander, Matthew J, Malkova, G V, Mankoff, Kenneth D, Manney, Gloria L, Marsh, J M, Meier, Walt, Moon, Twila A, Mote, Thomas, Mudryk, L, Mueter, F J, Müller, Rolf, Nyland, K E, O'Neel, Shad, Overland, James E, Perovich, Don, Phoenix, Gareth K, Raynolds, Martha K, Reijmer, C H, Ricker, Robert, Romanovsky, Vladimir E, Schuur, E A G, Sharp, Martin, Shiklomanov, Nikolai I, Smeets, C J P P, Smith, Sharon L, Streletskiy, Dimitri A, Tedesco, Marco, Thoman, Richard L, Thorson, J T, Tian-Kunze, X, Timmermans, Mary-Louise, Tømmervik, Hans, Tschudi, Mark, van As, Dirk, van de Wal, R S W, Walker, Donald A, Walsh, John E, Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wolken, Gabriel J, Wood, K, Wouters, Bert, Zador, S, Richter-Menge, Jacqueline, Druckenmiller, Matthew L, Andersen, J K, Andreassen, Liss M, Baker, Emily H, Ballinger, Thomas J, Berner, Logan T, Bernhard, Germar H, Bhatt, Uma S, Bjerke, Jarle W, Box, Jason E, Britt, L, Brown, R, Burgess, David, Cappelen, John, Christiansen, Hanne H, Decharme, B, Derksen, C, Drozdov, D S, Epstein, Howard E, Farquharson, L M, Farrell, Sinead L, Fausto, Robert S, Fettweis, Xavier, Fioletov, Vitali E, Forbes, Bruce C, Frost, Gerald V, Gerland, Sebastian, Goetz, Scott J, Grooß, Jens-Uwe, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Ialongo, Iolanda, Isaksen, K, Johnsen, Bjørn, Kaleschke, L, Kholodov, A L, Kim, Seong-Joong, Kohler, Jack, Labe, Zachary, Ladd, Carol, Lakkala, Kaisa, Lara, Mark J, Loomis Bryant andLuks, Bartlomiej, Luojus, K, Macander, Matthew J, Malkova, G V, Mankoff, Kenneth D, Manney, Gloria L, Marsh, J M, Meier, Walt, Moon, Twila A, Mote, Thomas, Mudryk, L, Mueter, F J, Müller, Rolf, Nyland, K E, O'Neel, Shad, Overland, James E, Perovich, Don, Phoenix, Gareth K, Raynolds, Martha K, Reijmer, C H, Ricker, Robert, Romanovsky, Vladimir E, Schuur, E A G, Sharp, Martin, Shiklomanov, Nikolai I, Smeets, C J P P, Smith, Sharon L, Streletskiy, Dimitri A, Tedesco, Marco, Thoman, Richard L, Thorson, J T, Tian-Kunze, X, Timmermans, Mary-Louise, Tømmervik, Hans, Tschudi, Mark, van As, Dirk, van de Wal, R S W, Walker, Donald A, Walsh, John E, Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wolken, Gabriel J, Wood, K, Wouters, Bert, Zador, S, Richter-Menge, Jacqueline, and Druckenmiller, Matthew L

Published
2020

14. The Arctic

Author

Dep Natuurkunde, Sub Dynamics Meteorology, Proceskunde, Sub Algemeen Marine & Atmospheric Res, Marine and Atmospheric Research, Andersen, J K, Andreassen, Liss M, Baker, Emily H, Ballinger, Thomas J, Berner, Logan T, Bernhard, Germar H, Bhatt, Uma S, Bjerke, Jarle W, Box, Jason E, Britt, L, Brown, R, Burgess, David, Cappelen, John, Christiansen, Hanne H, Decharme, B, Derksen, C, Drozdov, D S, Epstein, Howard E, Farquharson, L M, Farrell, Sinead L, Fausto, Robert S, Fettweis, Xavier, Fioletov, Vitali E, Forbes, Bruce C, Frost, Gerald V, Gerland, Sebastian, Goetz, Scott J, Grooß, Jens-Uwe, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Ialongo, Iolanda, Isaksen, K, Johnsen, Bjørn, Kaleschke, L, Kholodov, A L, Kim, Seong-Joong, Kohler, Jack, Labe, Zachary, Ladd, Carol, Lakkala, Kaisa, Lara, Mark J, Loomis Bryant andLuks, Bartlomiej, Luojus, K, Macander, Matthew J, Malkova, G V, Mankoff, Kenneth D, Manney, Gloria L, Marsh, J M, Meier, Walt, Moon, Twila A, Mote, Thomas, Mudryk, L, Mueter, F J, Müller, Rolf, Nyland, K E, O'Neel, Shad, Overland, James E, Perovich, Don, Phoenix, Gareth K, Raynolds, Martha K, Reijmer, C H, Ricker, Robert, Romanovsky, Vladimir E, Schuur, E A G, Sharp, Martin, Shiklomanov, Nikolai I, Smeets, C J P P, Smith, Sharon L, Streletskiy, Dimitri A, Tedesco, Marco, Thoman, Richard L, Thorson, J T, Tian-Kunze, X, Timmermans, Mary-Louise, Tømmervik, Hans, Tschudi, Mark, van As, Dirk, van de Wal, R S W, Walker, Donald A, Walsh, John E, Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wolken, Gabriel J, Wood, K, Wouters, Bert, Zador, S, Richter-Menge, Jacqueline, Druckenmiller, Matthew L, Dep Natuurkunde, Sub Dynamics Meteorology, Proceskunde, Sub Algemeen Marine & Atmospheric Res, Marine and Atmospheric Research, Andersen, J K, Andreassen, Liss M, Baker, Emily H, Ballinger, Thomas J, Berner, Logan T, Bernhard, Germar H, Bhatt, Uma S, Bjerke, Jarle W, Box, Jason E, Britt, L, Brown, R, Burgess, David, Cappelen, John, Christiansen, Hanne H, Decharme, B, Derksen, C, Drozdov, D S, Epstein, Howard E, Farquharson, L M, Farrell, Sinead L, Fausto, Robert S, Fettweis, Xavier, Fioletov, Vitali E, Forbes, Bruce C, Frost, Gerald V, Gerland, Sebastian, Goetz, Scott J, Grooß, Jens-Uwe, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Ialongo, Iolanda, Isaksen, K, Johnsen, Bjørn, Kaleschke, L, Kholodov, A L, Kim, Seong-Joong, Kohler, Jack, Labe, Zachary, Ladd, Carol, Lakkala, Kaisa, Lara, Mark J, Loomis Bryant andLuks, Bartlomiej, Luojus, K, Macander, Matthew J, Malkova, G V, Mankoff, Kenneth D, Manney, Gloria L, Marsh, J M, Meier, Walt, Moon, Twila A, Mote, Thomas, Mudryk, L, Mueter, F J, Müller, Rolf, Nyland, K E, O'Neel, Shad, Overland, James E, Perovich, Don, Phoenix, Gareth K, Raynolds, Martha K, Reijmer, C H, Ricker, Robert, Romanovsky, Vladimir E, Schuur, E A G, Sharp, Martin, Shiklomanov, Nikolai I, Smeets, C J P P, Smith, Sharon L, Streletskiy, Dimitri A, Tedesco, Marco, Thoman, Richard L, Thorson, J T, Tian-Kunze, X, Timmermans, Mary-Louise, Tømmervik, Hans, Tschudi, Mark, van As, Dirk, van de Wal, R S W, Walker, Donald A, Walsh, John E, Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wolken, Gabriel J, Wood, K, Wouters, Bert, Zador, S, Richter-Menge, Jacqueline, and Druckenmiller, Matthew L

Published
2020

16. The Arctic

Author

Andersen, J. K., additional, Andreassen, Liss M., additional, Baker, Emily H., additional, Ballinger, Thomas J., additional, Berner, Logan T., additional, Bernhard, Germar H., additional, Bhatt, Uma S., additional, Bjerke, Jarle W., additional, Box, Jason E., additional, Britt, L., additional, Brown, R., additional, Burgess, David, additional, Cappelen, John, additional, Christiansen, Hanne H., additional, Decharme, B., additional, Derksen, C., additional, Drozdov, D. S., additional, Epstein, Howard E., additional, Farquharson, L. M., additional, Farrell, Sinead L., additional, Fausto, Robert S., additional, Fettweis, Xavier, additional, Fioletov, Vitali E., additional, Forbes, Bruce C., additional, Frost, Gerald V., additional, Gerland, Sebastian, additional, Goetz, Scott J., additional, Grooß, Jens-Uwe, additional, Hanna, Edward, additional, Hanssen-Bauer, Inger, additional, Hendricks, Stefan, additional, Ialongo, Iolanda, additional, Isaksen, K., additional, Johnsen, Bjørn, additional, Kaleschke, L., additional, Kholodov, A. L., additional, Kim, Seong-Joong, additional, Kohler, Jack, additional, Labe, Zachary, additional, Ladd, Carol, additional, Lakkala, Kaisa, additional, Lara, Mark J., additional, Loomis, Bryant, additional, Luks, Bartłomiej, additional, Luojus, K., additional, Macander, Matthew J., additional, Malkova, G. V., additional, Mankoff, Kenneth D., additional, Manney, Gloria L., additional, Marsh, J. M., additional, Meier, Walt, additional, Moon, Twila A., additional, Mote, Thomas, additional, Mudryk, L., additional, Mueter, F. J., additional, Müller, Rolf, additional, Nyland, K. E., additional, O’Neel, Shad, additional, Overland, James E., additional, Perovich, Don, additional, Phoenix, Gareth K., additional, Raynolds, Martha K., additional, Reijmer, C. H., additional, Ricker, Robert, additional, Romanovsky, Vladimir E., additional, Schuur, E. A. G., additional, Sharp, Martin, additional, Shiklomanov, Nikolai I., additional, Smeets, C. J. P. P., additional, Smith, Sharon L., additional, Streletskiy, Dimitri A., additional, Tedesco, Marco, additional, Thoman, Richard L., additional, Thorson, J. T., additional, Tian-Kunze, X., additional, Timmermans, Mary-Louise, additional, Tømmervik, Hans, additional, Tschudi, Mark, additional, van As, Dirk, additional, van de Wal, R. S. W., additional, Walker, Donald A., additional, Walsh, John E., additional, Wang, Muyin, additional, Webster, Melinda, additional, Winton, Øyvind, additional, Wolken, Gabriel J., additional, Wood, K., additional, Wouters, Bert, additional, and Zador, S., additional

Published
2020
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17. ngVLA Key Science Goal 5 Understanding the Formation and Evolution of Black Holes in the Era of Multi-Messenger Astronomy

Author

Lazio, T. Joseph W., Alatalo, Katherine, Blecha, Laura, Boizelle, Benjamin, Bower, Geoffrey C., Braatz, James, Bogdanovic, Tamara, Brisken, Walter, Burke-Spolaor, Sarah, Carbone, Dario, Chomiuk, Laura, Civano, Francesca M., Comerford, Julia, Condon, James, Coppejans, Deanne, Corsi, Alessandra, Darling, Jeremiah K., Davis, Timothy A., Frail, Dale A., Hall, Kirsten R., Hallinan, Gregg, Harwood, Jeremy, Kharb, Preeti, Kimball, Amy, Kirkpatrick, Allison, Kording, E. G., Lacy, Mark, Lazzati, Davide, Lister, Matthew L., Liu, Xin, Maccarone, Thomas J., Metzger, Brian, Miller-Jones, J. C. A., MUKHERJEE, DIPANJAN, Nyland, K. E., O'Shaughnessy, Richard, Owen, Benjamin, Patil, Pallavi, Pesce, Dominic, Plotkin, Richard M., PRANDONI, ISABELLA, Ravi, Vikram, Reid, Mark, Reines, Amy, Rujopakarn, Wiphu, Rupen, Michael P., Sand, David, Shen, Yue, Simon, Joseph, Sivakoff, Gregory R., Strader, Jay, Taylor, Greg B., Taylor, Stephen, and van Velzen, Sjoert

Subjects
General Relativity and Quantum Cosmology, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract

The next-generation Very Large Array (ngVLA) will be a powerful telescope for finding and studying black holes across the entire mass range. High-resolution imaging abilities will allow the separation of low-luminosity black holes in the local Universe from background sources, thereby providing critical constraints on the mass function, formation, and growth of black holes. Its combination of sensitivity and angular resolution will provide new constraints on the physics of black hole accretion and jet formation. Combined with facilities across the spectrum and gravitational wave observatories, the ngVLA will provide crucial constraints on the interaction of black holes with their environments, with specific implications for the relationship between evolution of galaxies and the emission of gravitational waves from in-spiraling supermassive black holes and potential implications for stellar mass and intermediate mass black holes. The ngVLA will identify the radio counterparts to transient sources discovered by electromagnetic, gravitational wave, and neutrino observatories, and its high-resolution, fast-mapping capabilities will make it the preferred instrument to pinpoint electromagnetic counterparts to events such as supermassive black hole mergers. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. Part of this research was carried out at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration.

Published
2019

18. Quenching of Star Formation in Molecular Outflow Host NGC 1266

Author

Alatalo, K., Nyland, K. E., Graves, G., Deustua, S., Young, L. M., Davis, T. A., Crocker, A. F., Bureau, M., Bayet, E., Blitz, L., Bois, M., Bournaud, F., Cappellari, M., Davies, R. L., de Zeeuw, P. T., Emsellem, E., Khochfar, S., Krajnovic, D., Kuntschner, H., McDermid, R. M., Morganti, R., Naab, T., Oosterloo, T., Sarzi, M., Scott, N., Serra, P., Weijmans, A., Wong, Tony, Ott, Jürgen, and Astronomy

Subjects
Physics, Quenching, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar population, Star formation, galaxies: active, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics, Galaxy, Stars, Space and Planetary Science, galaxies: individual (NGC 1266), Outflow, galaxies: evolution, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We detail the rich molecular story of NGC 1266, its serendipitous discovery within the ATLAS3D survey (Cappellari et al. 2011) and how it plays host to an AGN-driven molecular outflow, potentially quenching all of its star formation (SF) within the next 100 Myr. While major mergers appear to play a role in instigating outflows in other systems, deep imaging of NGC 1266 as well as stellar kinematic observations from SAURON, have failed to provide evidence that NGC 1266 has recently been involved in a major interaction. The molecular gas and the instantaneous SF tracers indicate that the current sites of star formation are located in a hypercompact disk within 200 pc of the nucleus (Fig. 1; SF rate ~ 2 Msuns/yr). On the other hand, tracers of recent star formation, such as the H{\beta} absorption map from SAURON and stellar population analysis show that the young stars are distributed throughout a larger area of the galaxy than current star formation. As the AGN at the center of NGC 1266 continues to drive cold gas out of the galaxy, we expect star formation rates to decline as the star formation is ultimately quenched. Thus, NGC 1266 is in the midst of a key portion of its evolution and continued studies of this unique galaxy may help improve our understanding of how galaxies transition from the blue to the red sequence (Alatalo et al. 2011)., Comment: 1 page, Proceedings IAU symposium No. 292: Molecular gas, dust and star formation in galaxies, ed. by Tony Wong and Juergen Ott

Published
2013
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20. Quenching of Star Formation in Molecular Outflow Host NGC 1266

Author

Alatalo, K., primary, Nyland, K. E., additional, Graves, G., additional, Deustua, S., additional, Young, L. M., additional, Davis, T. A., additional, Crocker, A. F., additional, Bureau, M., additional, Bayet, E., additional, Blitz, L., additional, Bois, M., additional, Bournaud, F., additional, Cappellari, M., additional, Davies, R. L., additional, de Zeeuw, P. T., additional, Emsellem, E., additional, Khochfar, S., additional, Krajnovic, D., additional, Kuntschner, H., additional, McDermid, R. M., additional, Morganti, R., additional, Naab, T., additional, Oosterloo, T., additional, Sarzi, M., additional, Scott, N., additional, Serra, P., additional, and Weijmans, A., additional

Published
2012
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21. AGN Feedback Driven Molecular Outflow in NGC 1266

Author

Alatalo, K., primary, Nyland, K. E., additional, Graves, G., additional, Deustua, S., additional, Wrobel, J., additional, Young, L. M., additional, Davis, T. A., additional, Bureau, M., additional, Bayet, E., additional, Blitz, L., additional, Bois, M., additional, Bournaud, F., additional, Cappellari, M., additional, Davies, R. L., additional, de Zeeuw, P. T., additional, Emsellem, E., additional, Khochfar, S., additional, Krajnovic, D., additional, Kuntschner, H., additional, Martín, S., additional, McDermid, R. M., additional, Morganti, R., additional, Naab, T., additional, Sarzi, M., additional, Scott, N., additional, Serra, P., additional, and Weijmans, A., additional

Published
2012
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22. The Arctic

Author

Andersen, J K, Andreassen, Liss M, Baker, Emily H, Ballinger, Thomas J, Berner, Logan T, Bernhard, Germar H, Bhatt, Uma S, Bjerke, Jarle W, Box, Jason E, Britt, L, Brown, R, Burgess, David, Cappelen, John, Christiansen, Hanne H, Decharme, B, Derksen, C, Drozdov, D S, Epstein, Howard E, Farquharson, L M, Farrell, Sinead L, Fausto, Robert S, Fettweis, Xavier, Fioletov, Vitali E, Forbes, Bruce C, Frost, Gerald V, Gerland, Sebastian, Goetz, Scott J, Grooß, Jens-Uwe, Hanna, Edward, Hanssen-Bauer, Inger, Hendricks, Stefan, Ialongo, Iolanda, Isaksen, K, Johnsen, Bjørn, Kaleschke, L, Kholodov, A L, Kim, Seong-Joong, Kohler, Jack, Labe, Zachary, Ladd, Carol, Lakkala, Kaisa, Lara, Mark J, Loomis Bryant andLuks, Bartlomiej, Luojus, K, Macander, Matthew J, Malkova, G V, Mankoff, Kenneth D, Manney, Gloria L, Marsh, J M, Meier, Walt, Moon, Twila A, Mote, Thomas, Mudryk, L, Mueter, F J, Müller, Rolf, Nyland, K E, O'Neel, Shad, Overland, James E, Perovich, Don, Phoenix, Gareth K, Raynolds, Martha K, Reijmer, C H, Ricker, Robert, Romanovsky, Vladimir E, Schuur, E A G, Sharp, Martin, Shiklomanov, Nikolai I, Smeets, C J P P, Smith, Sharon L, Streletskiy, Dimitri A, Tedesco, Marco, Thoman, Richard L, Thorson, J T, Tian-Kunze, X, Timmermans, Mary-Louise, Tømmervik, Hans, Tschudi, Mark, van As, Dirk, van de Wal, R S W, Walker, Donald A, Walsh, John E, Wang, Muyin, Webster, Melinda, Winton, Øyvind, Wolken, Gabriel J, Wood, K, Wouters, Bert, Zador, S, Richter-Menge, Jacqueline, Druckenmiller, Matthew L, Dep Natuurkunde, Sub Dynamics Meteorology, Proceskunde, Sub Algemeen Marine & Atmospheric Res, Marine and Atmospheric Research, Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Atmospheric Science, Oceanography, State (polity), [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, media_common.quotation_subject, Environmental science, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, [SDU.STU.ME]Sciences of the Universe [physics]/Earth Sciences/Meteorology, ComputingMilieux_MISCELLANEOUS, media_common, The arctic
Abstract

International audience

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23. Cognitive-behavioral group therapy for panic disorder in the general clinical setting: a naturalistic study with 1-year follow-up.

Author

Martinsen EW, Olsen T, Tønset E, Nyland KE, and Aarre TF

Subjects
Adult, Ambulatory Care, Antidepressive Agents therapeutic use, Comorbidity, Depressive Disorder drug therapy, Depressive Disorder epidemiology, Female, Follow-Up Studies, Humans, Male, Multivariate Analysis, Panic Disorder epidemiology, Panic Disorder prevention & control, Patient Dropouts, Prospective Studies, Psychiatric Status Rating Scales statistics & numerical data, Psychotherapy, Group, Treatment Outcome, Cognitive Behavioral Therapy, Panic Disorder therapy
Abstract

Background: Cognitive-behavioral therapy (CBT) is well documented in the treatment of panic disorder. As most investigators have studied selected patients without comorbid disorders, it is less clear how well the treatment will perform in the usual clinical setting for patients with comorbid disorders and with physicians who do not have training in CBT. During the last 6 years, we have offered CBT in outpatient groups for patients with panic disorder and agoraphobia. The purpose of this prospective study was to assess the outcome of group treatment and compare the results with those of studies that used individual treatment. We wanted to identify variables that might predict outcome at follow-up and to assess the number and characteristics of dropouts., Method: Eighty-three consecutive patients with DSM-III-R panic disorder (56 women and 27 men; mean age = 34.5 years) were studied. Mean duration of panic disorder was 7.5 years. There was a high degree of comorbid major depression, social phobia, and psychoactive substance abuse/dependence. Treatment consisted of 4-hour group sessions conducted once a week for 11 weeks. More than half of the patients used antidepressant drugs. Degree of phobic avoidance, bodily sensations, anxiety cognitions, and depression were assessed at pretreatment, baseline, and end of treatment and at follow-up after 3 and 12 months., Results: There was a large decrease in scores from start to end on all assessments. Sixty-three (89%) of 73 completers responded (> or = 50% reduction in Phobic Avoidance Rating Scale scores). Gains were maintained and even improved upon at follow-up. The results are comparable with studies that used individual therapy. A high depression score at the end of treatment predicted poor outcome at 1-year follow-up. Twelve (14%) of 83 did not complete the program. The presence of severe personality disorders and ongoing alcohol or substance abuse or dependence was associated with poor outcome and high dropout rate., Conclusion: CBT appears to be effective in the usual clinical setting, even in the hands of therapists without formal competence. Group therapy is a feasible arrangement, and the results from group treatment are comparable to those of individual approaches. Precise diagnosis and treatment of comorbid depression are of utmost importance. Patients with additional substance abuse or dependence, as well as severe personality disorders, may find this treatment modality less helpful.

Published
1998
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