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9 results on '"Hood, CE"'

1. The lick AGN monitoring project: Alternate routes to a broad-line region radius

Author

Greene, JE, Hood, CE, Barth, AJ, Bennert, VN, Bentz, MC, Filippenko, AV, Gates, E, Malkan, MA, Treu, T, Walsh, JL, and Woo, JH

Subjects
galaxies: active, galaxies: nuclei, galaxies: Seyfert, astro-ph.CO, Astronomy & Astrophysics, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural)
Abstract

It is now possible to estimate black hole (BH) masses across cosmic time, using broad emission lines in active galaxies. This technique informs our views of how galaxies and their central BHs coevolve. Unfortunately, there are many outstanding uncertainties associated with these "virial" mass estimates. One of these comes from using the accretion luminosity to infer a size for the broad-line region (BLR). Incorporating the new sample of low-luminosity active galaxies from our recent monitoring campaign at Lick Observatory, we recalibrate the radius-luminosity relation with tracers of the accretion luminosity other than the optical continuum. We find that the radius of the BLR scales as the square root of the X-ray and Hβ luminosities, in agreement with recent optical studies. On the other hand, the scaling appears to be marginally steeper with narrow-line luminosities. This is consistent with a previously observed decrease in the ratio of narrow-line to X-ray luminosity with increasing total luminosity. The radius of the BLR correlates most tightly with Hβ luminosity, while the X-ray and narrow-line relations both have comparable scatter of a factor of 2. These correlations provide useful alternative virial BH masses in objects with no detectable optical/UV continuum emission, such as high-redshift galaxies with broad emission lines, radio-loud objects, or local active galaxies with galaxy-dominated continua. © 2010. The American Astronomical Society.

Published
2010

2. The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256-1257 b

Author

Miles, BE, Biller, BA, Patapis, P, Worthen, K, Rickman, E, Hoch, KKW, Skemer, A, Perrin, MD, Whiteford, N, Chen, CH, Sargent, B, Mukherjee, S, Morley, CV, Moran, SE, Bonnefoy, M, Petrus, S, Carter, AL, Choquet, E, Hinkley, S, Ward-Duong, K, Leisenring, JM, Millar-Blanchaer, MA, Pueyo, L, Ray, S, Sallum, S, Stapelfeldt, KR, Stone, JM, Wang, JJ, Absil, O, Balmer, WO, Boccaletti, A, Bonavita, M, Booth, M, Bowler, BP, Chauvin, G, Christiaens, V, Currie, T, Danielski, C, Fortney, JJ, Girard, JH, Grady, CA, Greenbaum, AZ, Henning, T, Hines, DC, Janson, M, Kalas, P, Kammerer, J, Kennedy, GM, Kenworthy, MA, Kervella, P, Lagage, PO, Lew, BWP, Liu, MC, Macintosh, B, Marino, S, Marley, MS, Marois, C, Matthews, EC, Matthews, BC, Mawet, D, McElwain, MW, Metchev, S, Meyer, MR, Molliere, P, Pantin, E, Quirrenbach, A, Rebollido, I, Ren, BB, Schneider, G, Vasist, M, Wyatt, MC, Zhou, Y, Briesemeister, ZW, Bryan, ML, Calissendorff, P, Cantalloube, F, Cugno, G, De Furio, M, Dupuy, TJ, Factor, SM, Faherty, JK, Fitzgerald, MP, Franson, K, Gonzales, EC, Hood, CE, Howe, AR, Kraus, AL, Kuzuhara, M, Lagrange, AM, Lawson, K, Lazzoni, C, Liu, P, Llop-Sayson, J, Lloyd, JP, Martinez, RA, Mazoyer, J, Quanz, SP, Redai, JA, Samland, M, Schlieder, JE, Miles, BE [0000-0002-5500-4602], Biller, BA [0000-0003-4614-7035], Patapis, P [0000-0001-8718-3732], Worthen, K [0000-0002-5885-5779], Rickman, E [0000-0003-4203-9715], Hoch, KKW [0000-0002-9803-8255], Skemer, A [0000-0001-6098-3924], Perrin, MD [0000-0002-3191-8151], Whiteford, N [0000-0001-8818-1544], Chen, CH [0000-0002-8382-0447], Sargent, B [0000-0001-9855-8261], Mukherjee, S [0000-0003-1622-1302], Morley, CV [0000-0002-4404-0456], Moran, SE [0000-0002-6721-3284], Bonnefoy, M [0000-0001-5579-5339], Petrus, S [0000-0003-0331-3654], Carter, AL [0000-0001-5365-4815], Choquet, E [0000-0002-9173-0740], Hinkley, S [0000-0001-8074-2562], Ward-Duong, K [0000-0002-4479-8291], Leisenring, JM [0000-0002-0834-6140], Millar-Blanchaer, MA [0000-0001-6205-9233], Ray, S [0000-0003-2259-3911], Sallum, S [0000-0001-6871-6775], Stapelfeldt, KR [0000-0002-2805-7338], Stone, JM [0000-0003-0454-3718], Wang, JJ [0000-0003-0774-6502], Absil, O [0000-0002-4006-6237], Balmer, WO [0000-0001-6396-8439], Boccaletti, A [0000-0001-9353-2724], Bonavita, M [0000-0002-7520-8389], Booth, M [0000-0001-8568-6336], Bowler, BP [0000-0003-2649-2288], Chauvin, G [0000-0003-4022-8598], Christiaens, V [0000-0002-0101-8814], Currie, T [0000-0002-7405-3119], Danielski, C [0000-0002-3729-2663], Fortney, JJ [0000-0002-9843-4354], Girard, JH [0000-0001-8627-0404], Greenbaum, AZ [0000-0002-7162-8036], Henning, T [0000-0002-1493-300X], Hines, DC [0000-0003-4653-6161], Janson, M [0000-0001-8345-593X], Kalas, P [0000-0002-6221-5360], Kammerer, J [0000-0003-2769-0438], Kennedy, GM [0000-0001-6831-7547], Kenworthy, MA [0000-0002-7064-8270], Kervella, P [0000-0003-0626-1749], Lew, BWP [0000-0003-1487-6452], Liu, MC [0000-0003-2232-7664], Macintosh, B [0000-0003-1212-7538], Marino, S [0000-0002-5352-2924], Marley, MS [0000-0002-5251-2943], Marois, C [0000-0002-4164-4182], Matthews, EC [0000-0003-0593-1560], Matthews, BC [0000-0003-3017-9577], Mawet, D [0000-0002-8895-4735], McElwain, MW [0000-0003-0241-8956], Metchev, S [0000-0003-3050-8203], Meyer, MR [0000-0003-1227-3084], Molliere, P [0000-0003-4096-7067], Pantin, E [0000-0001-6472-2844], Rebollido, I [0000-0002-4388-6417], Ren, BB [0000-0003-1698-9696], Schneider, G [0000-0002-4511-5966], Vasist, M [0000-0002-4511-3602], Wyatt, MC [0000-0001-9064-5598], Zhou, Y [0000-0003-2969-6040], Briesemeister, ZW [0000-0002-1764-2494], Bryan, ML [0000-0002-6076-5967], Calissendorff, P [0000-0002-5335-0616], Cantalloube, F [0000-0002-3968-3780], Cugno, G [0000-0001-7255-3251], De Furio, M [0000-0003-1863-4960], Dupuy, TJ [0000-0001-9823-1445], Factor, SM [0000-0002-8332-8516], Faherty, JK [0000-0001-6251-0573], Fitzgerald, MP [0000-0002-0176-8973], Franson, K [0000-0003-4557-414X], Gonzales, EC [0000-0003-4636-6676], Hood, CE [0000-0003-1150-7889], Howe, AR [0000-0002-4884-7150], Kraus, AL [0000-0001-9811-568X], Kuzuhara, M [0000-0002-4677-9182], Lawson, K [0000-0002-6964-8732], Lazzoni, C [0000-0001-7819-9003], Liu, P [0000-0001-7047-0874], Llop-Sayson, J [0000-0002-3414-784X], Martinez, RA [0000-0001-6301-896X], Mazoyer, J [0000-0002-9133-3091], Quanz, SP [0000-0003-3829-7412], Redai, JA [0000-0002-4489-3168], Samland, M [0000-0001-9992-4067], Schlieder, JE [0000-0001-5347-7062], and Apollo - University of Cambridge Repository

Subjects
The Solar System, Exoplanets, and Astrobiology, 5109 Space Sciences, 51 Physical Sciences
Abstract

We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a M Jup widely separated (∼8″, a = 150 au), young, planetary-mass companion that shares photometric colors and spectroscopic features with the directly imaged exoplanets HR 8799c, d, and e. As an L-to-T transition object, VHS 1256 b exists along the region of the color–magnitude diagram where substellar atmospheres transition from cloudy to clear. We observed VHS 1256 b with JWST's NIRSpec IFU and MIRI MRS modes for coverage from 1 to 20 μm at resolutions of ∼1000–3700. Water, methane, carbon monoxide, carbon dioxide, sodium, and potassium are observed in several portions of the JWST spectrum based on comparisons from template brown dwarf spectra, molecular opacities, and atmospheric models. The spectral shape of VHS 1256 b is influenced by disequilibrium chemistry and clouds. We directly detect silicate clouds, the first such detection reported for a planetary-mass companion.

Published
2023

5. Remission maintenance therapy in acute myelogenous leukemia.

Author

Embury SH, Elias L, Heller PH, Hood CE, Greenberg PL, and Schrier SL

Subjects
Adolescent, Adult, Aged, Cytarabine therapeutic use, Humans, Middle Aged, Remission, Spontaneous, Thioguanine therapeutic use, Leukemia, Myeloid, Acute drug therapy
Abstract

Because no conclusive evidence as to the efficacy of maintenance chemotherapy in acute myelogenous leukemia (AML) existed, a study to obtain such information was done. Twenty-six adult patients with AML in whom complete remission had been achieved following induction chemotherapy were randomly assigned to receive either maintenance chemotherapy consisting of cytarabine and 6-thioguanine for two days each month or to receive no maintenance therapy. The data showed a significant difference in remission duration between the two groups, with median remission lengths for the maintained and unmaintained groups being 10.3 and 6.7 months, respectively (p<.05). In 46 percent of the maintained patients there were remissions lasting longer than 11 months, whereas in none of the unmaintained patients was there such a prolonged remission. No significant drug-induced toxicity was observed. That the prolonged exposure to these chemotherapeutic agents, which were also used in our induction program, did not adversely affect the rate of successful reinduction therapy was shown by identical 50 percent complete remission rates for second inductions in both groups. In patients with palpable splenomegaly at the time of diagnosis, there was no prolongation of remission with maintenance therapy. These data indicate the potential utility of maintenance chemotherapy for prolonging remission duration in acute myelogenous leukemia.

Published
1977

6. Factors affecting mortality of gram-negative rod bacteremia.

Author

Bryant RE, Hood AF, Hood CE, and Koenig MG

Subjects
Adolescent, Adult, Age Factors, Aged, Colistin administration & dosage, Cross Infection complications, Escherichia coli Infections drug therapy, Female, Fever complications, Humans, Kanamycin administration & dosage, Klebsiella Infections drug therapy, Leukocyte Count, Male, Microbial Sensitivity Tests, Middle Aged, Nitrogen blood, Penicillins administration & dosage, Proteus Infections drug therapy, Pseudomonas Infections drug therapy, Retrospective Studies, Sepsis drug therapy, Sex Factors, Shock complications, Uremia complications, Escherichia coli Infections mortality, Klebsiella Infections mortality, Proteus Infections mortality, Pseudomonas Infections mortality, Sepsis mortality
Published
1971

7. Dialysed egg as nitrogen source in dietary control of chronic renal failure.

Author

Hood CE, Housley J, Beale DJ, and Hardwicke J

Subjects
Adult, Body Weight, Creatinine blood, Dialysis, Female, Freeze Drying, Humans, Hyperkalemia therapy, Male, Middle Aged, Potassium analysis, Potassium blood, Potassium metabolism, Sodium analysis, Sodium metabolism, Urea blood, Diet Therapy, Eggs, Kidney Failure, Chronic therapy, Nitrogen analysis, Nitrogen blood, Nitrogen metabolism
Published
1969
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9. Influence of temperature and humidity on microbial, enzymatic, and physical changes of stored, pickling cucumbers.

Author

Etchells JL, Bell TA, Costilow RN, Hood CE, and Anderson TE

Subjects
Bacteria isolation & purification, Cellulase metabolism, Cellulose, Fungi isolation & purification, Glycoside Hydrolases metabolism, Pectins, Time Factors, Food Microbiology, Food-Processing Industry, Humidity, Temperature, Vegetables analysis
Abstract

Pickling cucumbers stored at five temperatures and four relative humidities were examined for growth of eight microbial groups, the activities of two enzyme systems (pectinolytic and cellulolytic), and weight loss. Twenty-four storage tests for 6 days each were conducted during the 2-year study. In general, microbial populations of the eight groups increased rapidly at the higher temperature (>21 C) and humidity (>70%) treatments. Moisture loss of the cucumbers was rapid with combinations of high temperatures and low humidities. The results suggest that the best environmental conditions for storage or transport of cucumbers would be a combination of low temperature (10 C) with high relative humidity (about 95%). These conditions minimized undesirable microbial, enzymatic, and physical changes of stored, pickling cucumbers.

Published
1973
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