M. Dumke, M. Krause, R. Wielebinski,
... observed the continuum emission of the interacting galaxy NGC 4631 at 870 μm and 1.23 mm using the Heinrich- ...
Tópico(s): Stellar, planetary, and galactic studies
2004 - EDP Sciences | Astronomy and Astrophysics
A. Weiß, A. Kovács, R. Güsten, K. M. Menten, F. Schüller, G. Siringo, E. Kreysa,
We present large scale 870 μm maps of the nearby starburst galaxies NGC 253 and NGC 4945 as well as the nearest giant elliptical radio galaxy Centaurus A (NGC 5128) obtained with the ... a radial distance of (7.5 kpc). In NGC 5128 our LABOCA image also shows, for the first time at submillimeter wavelengths, the synchrotron emission associated with the radio jet and the inner radio lobes. From an analysis of the 870 μm emission in conjunction with ISO-LWS, IRAS ...
Tópico(s): Astrophysical Phenomena and Observations
2008 - EDP Sciences | Astronomy and Astrophysics
Kazuyuki Muraoka, Kazuo Sorai, Nario Kuno, Naomasa Nakai, Hiroyuki Nakanishi, Miho Takeda, Kazuki Yanagitani, Hiroyuki Kaneko, Yusuke Miyamoto, Nozomi Kishida, Takuya Hatakeyama, Michiko Umei, Takahiro Tanaka, Yuto Tomiyasu, Chey Saita, Saeko Ueno, Naoko Matsumoto, Dragan Salak, Kana Morokuma-Matsui,
... 0 kpc) of the nearby barred spiral galaxy NGC 2903 with the Nobeyama Radio Observatory 45-m telescope at an effective angular resolution of 20" (or 870 pc). We detected 12CO(J=1-0) emission over the disk of NGC 2903. In addition, significant 13CO(J=1-0) ...
Tópico(s): Astrophysical Phenomena and Observations
2016 - Oxford University Press | Publications of the Astronomical Society of Japan
M. Galametz, S. C. Madden, F. Galliano, S. Hony, F. Schüller, A. Beelen, G. J. Bendo, M. Sauvage, A. Lundgren, N. Billot,
... ISM properties in dwarf galaxies. Methods. We present 870 μm images of four low metallicity galaxies (NGC 1705, Haro 11, Mrk 1089 and UM311) observed ... IR observations extending only to 160 μm. For NGC 1705 and Haro 11, an excess in submillimeter wavelengths was detected when we used our standard dust SED model. We rerun our SED procedure adding a cold dust component (10 K) to better describe the high 870 μm flux derived from LABOCA observations, which significantly ...
Tópico(s): Stellar, planetary, and galactic studies
2009 - EDP Sciences | Astronomy and Astrophysics
M. Galametz, S. C. Madden, F. Galliano, S. Hony, F. Schüller, A. Beelen, G. J. Bendo, M. Sauvage, A. Lundgren, N. Billot,
... ISM properties in dwarf galaxies. Methods. We present 870 μ m images of four low metallicity galaxies (NGC 1705, Haro 11, Mrk 1089 and UM 311) ... observations extending only to 160 μ m. For NGC 1705 and Haro 11, an excess in submillimeter wavelengths was detected when we used our standard dust SED model. We rerun our SED procedure adding a cold dust component (10 K) to better describe the high 870 μ m flux derived from LABOCA observations, which ...
Tópico(s): Astrophysical Phenomena and Observations
2009 - EDP Sciences | Astronomy and Astrophysics
C. Vlahakis, M. Baes, G. J. Bendo, A. Lundgren,
The Sombrero galaxy (NGC 4594) is an Sa galaxy with a symmetric dust ring. We have used the Large APEX BOlometer CAmera (LABOCA) at 870 μm and the MAx-Planck Millimeter BOlometer (MAMBO-2) at 1.2 mm to detect the dust ring for ...
Tópico(s): Spectroscopy and Laser Applications
2008 - EDP Sciences | Astronomy and Astrophysics
Joshua Pepper, Christopher J. Burke,
... analyze the STEPSS observations of the open cluster NGC 1245 to determine the variable star content of the cluster. Out of 6787 stars observed with V < 22, of which ~870 are cluster members, we find 14 stars with ...
Tópico(s): Astrophysics and Star Formation Studies
2006 - Institute of Physics | The Astronomical Journal
Andreas Schulz, C. Henkel, D. Muders, R. Q. Mao, M. Röllig, R. Mauersberger,
... system of the Antennae galaxies (NGC 4038 and NGC 4039), we have obtained 12CO (1–0), (2–1) and (3–2) line maps, as well as a map of the 870 μm continuum emission. Our results are analysed in ...
Tópico(s): Astrophysical Phenomena and Observations
2007 - EDP Sciences | Astronomy and Astrophysics
A. H. C. Thean, C. G. Mundell, A. Pedlar, R. A. Nicholson,
... are presented for the Seyfert type 1 galaxy NGC 5033. Our measurements show that the total H i mass of the galaxy is 7.0 × 109 M⊙ and that it is receding at 870 km s−1. The column density map features ...
Tópico(s): Astrophysics and Star Formation Studies
1997 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Eric Keto, G. Jernigan, J. F. Arens, M. Meixner, Roger Ball,
... mid-IR image of the IR-bright galaxy NGC 34. The observation shows the mid-IR emission to be very compact <=2.3"x 1.7" (<= 870 x 640 pc, D = 78 Mpc, H_0_= ...
Tópico(s): Astronomy and Astrophysical Research
1991 - IOP Publishing | The Astrophysical Journal
Abstract We explore the gas morphology and excitation mechanisms of the ionization cones of the type II Seyfert galaxy NGC 5728. Kinematics derived from near-infrared and optical data from the SINFONI and MUSE Integral Field Units on the VLT reveal active galactic nucleus (AGN)-driven outflows powered by a supermassive black hole (SMBH) of mass 3.4 × 10 7 M ⊙ , bolometric luminosity of 1.46 × 10 44 erg s −1 , Eddington ratio of 3.3 × 10 −2 , and an accretion rate of 2.7 × 10 −2 M ⊙ yr −1 . The symmetric bicone outflows show ...
Tópico(s): Astrophysics and Star Formation Studies
2019 - IOP Publishing | The Astrophysical Journal
X. Zhao, Stefano Marchesi, M. Ajello, L. Marcotulli, G. Cusumano, V. La Parola, C. Vignali,
Abstract We present the combined NuSTAR and XMM - Newton 0.6–79 keV spectral analysis of a Seyfert 2 galaxy, NGC 1358, which we selected as a candidate Compton-thick (CT) active galactic nucleus (AGN) on the basis of previous Swift /BAT and Chandra studies. According to our analysis, NGC 1358 is confirmed to be a CT-AGN using physically motivated models, at >3 σ confidence level. Our best fit shows that the column density along the line of sight of the obscuring material surrounding the accreting supermassive ...
Tópico(s): Gamma-ray bursts and supernovae
2019 - IOP Publishing | The Astrophysical Journal
Christopher J. Burke, B. Scott Gaudi, D. L. DePoy, Richard W. Pogge,
... for transiting extrasolar planets in the open cluster NGC 1245. An automated transit search algorithm with quantitative selection criteria finds six transit candidates; none are bona fide planetary transits. We characterize the survey detection probability via Monte Carlo injection and recovery of realistic limb-darkened transits. We use this to derive upper limits on the fraction of cluster members with close-in Jupiter radii, RJ, companions. The survey sample contains ∼870 cluster members, and we calculate 95% confidence upper ...
Tópico(s): Astrophysics and Star Formation Studies
2006 - Institute of Physics | The Astronomical Journal
Baltasar Vila-Vilaró, D. Espada, Paulo C. Cortés, Stéphane Leon, E. Pompei, J. Cepa,
We present the results of CO interferometric observations of the southern elliptical galaxy NGC3557 with ALMA. We have detected both the CO(1-0) emission line and a relatively strong continuum at 3mm. The continuum shows a flat-spectrum central unresolved source (at our angular resolution of 0.7arcsec) and two jets, associated with the larger scale emission observed at lower frequencies. The molecular gas in NGC3557 appears to be concentrated within 250 pc of the center, and shows evidence of organized ...
Tópico(s): Astrophysical Phenomena and Observations
2019 - IOP Publishing | The Astrophysical Journal
M. G. Richer, J. Guillén, A. Arrieta, S. Torres‐Peimbert,
We present spatial- and velocity-resolved spectroscopy of NGC 7009 acquired with the UVES spectrograph at the VLT UT2/Kueyen. We use these data to determine the structure of the electron temperature and electron density based upon O ii permitted (recombination) lines. We find a strong gradient in the O ii-based electron temperature. It agrees with the electron temperature determined by forbidden (collisionally excited) lines in part of the nebular volume, but also differs by more than 6000 K in other ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2019 - IOP Publishing | The Astrophysical Journal
Nazzeha A. Daod, Mohammed K. Zeki,
Abstract The density and mass of the spiral galaxy NGC 3198 have been studied as functions of the distance from the center of galaxy depending on its observed rotation curve. Calculation of density and mass at different radii of the galaxy NGC 3198 show that the central inner density ρ 1(r) at r < r t ( r t is the turn-off radius) is found to be constant ρ 1 = 0.387 M o pc −3 , while the density ρ 2(r) of the outer region r > r t is much less than the inner region, which varies from 0.0187 M o pc −3 at r = 4 ...
Tópico(s): Stellar, planetary, and galactic studies
2019 - IOP Publishing | The Astrophysical Journal
Yu Wang, Fuyao Lui, Zhi-Qiang Shen, Jingying Wang, Dan Hu, Haiguang Xu,
By analyzing the Chandra archival data of the nearby NGC 6338 galaxy group, we identify two X-ray bright clumps (N-clump and S-clump) within the central 100 kpc, and detect an arc-like X-ray brightness discontinuity at the south boundary of the N-clump, which is defined as a cold front with a gas flow Mach number of M<0.8. Furthermore, at the north-east boundary of the S-clump (dominated by galaxy NGC 6338) another X-ray edge is detected that corresponds to a weaker cold front. Therefore, the two ...
Tópico(s): Gamma-ray bursts and supernovae
2019 - IOP Publishing | The Astrophysical Journal
A. Mucciarelli, E. Lapenna, C. Lardo, P. Bonifacio, F. R. Ferraro, B. Lanzoni,
Asymptotic giant branch (AGB) stars in the globular cluster NGC6752 have been found to exhibit some chemical peculiarities with respect to the red giant branch (RGB) stars. A discrepancy between [FeI/H] and [FeII/H] (not observed in RGB stars) has been detected adopting spectroscopic temperatures. Moreover, a possible lack of second-population stars along the AGB was claimed. The use of photometric temperatures based on (V-K) colors was proposed to erase this iron discrepancy. Also, ad hoc scenarios have ...
Tópico(s): Astronomy and Astrophysical Research
2019 - IOP Publishing | The Astrophysical Journal
G. J. White, J. P. Phillips, G. D. Watt,
... rightarrow2$| transition of carbon monoxide at 345 GHz (870 µm) have been obtained using an indium antimonide heterodyne spectral-line receiver with the United Kingdom 3.8-m Infrared Telescope (UKIRT) at Mauna Kea. Mapping observations of up to ½ deg2 areas are reported towards the sources NGC 1333, 2023, 2024 and 2068. These maps, obtained ...
Tópico(s): Atmospheric Ozone and Climate
1981 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
S. B. Anderson, A. Wolszczan, S. R. Kulkarni, Thomas A. Prince,
We report on 5 yr of pulsar observations of the globular cluster NGC 5904 (M5). A timing model has been obtained for the two known pulsars, and a deep search for additional faint isolated pulsars has lowered the detection flux limit to 40 μJy without further detection. We discuss the details and implications of the phase coherent timing models for PSR B1516+02A and PSR B1516+02B. Of particular interest for the binary PSR B1516+02B are the observed negative period derivative due to acceleration in ...
Tópico(s): Advanced Frequency and Time Standards
1997 - IOP Publishing | The Astrophysical Journal
George Younes, A. Ptak, Luis C. Ho, Fu‐Guo Xie, Yuichi Terasima, Feng Yuan, Daniela Huppenkothen, Mihoko Yukita,
... of two low-luminosity Active Galactic Nuclei (LLAGN), NGC 3998 and NGC 4579. We do not detect any significant variability ... broad-band 0.5-60 keV spectrum of NGC 3998 is best fit with a cutoff power-law, while the one for NGC 4579 is best fit with a combination of ... R<0.3$ and $R<0.18$ for NGC 3998 and NGC 4579, respectively; (2) the 6-7 keV line complex in NGC 4579 could either be fit with a narrow ... lines, which includes contribution from Fe XXVI; (3) NGC 4579 flux is 60% brighter than previously detected ...
Tópico(s): Astrophysics and Cosmic Phenomena
2019 - IOP Publishing | The Astrophysical Journal
Daniel A. Dale, G. J. Bendo, C. W. Engelbracht, Karl D. Gordon, Michael W. Regan, L. Armus, John M. Cannon, Daniela Calzetti, B. T. Draine, G. Hélou, R. D. Joseph, Robert C. Kennicutt, Aigen Li, E. J. Murphy, H. Roussel, Fabian Walter, Heather Hanson, D. J. Hollenbach, T. H. Jarrett, Lisa J. Kewley, Christine Lamanna, Claus Leitherer, M. Meyer, G. H. Rieke, Marcia Rieke, Kartik Sheth, J. D. Smith, M. D. Thornley,
... various locations within the three large, nearby galaxies NGC 3031 (M81), NGC 5194 (M51), and NGC 7331. A wide variety of spectral shapes is found within each galaxy, especially for NGC 3031, the closest of the three targets and ... 8.0 μm)/fν(24 μm) colors within NGC 3031, NGC 5194, and NGC 7331. If the galaxy-to-galaxy variations in ...
Tópico(s): Stellar, planetary, and galactic studies
2005 - IOP Publishing | The Astrophysical Journal
Chengwei Zhang, Yao Wang, Feipeng Wang, Si Zhao, Jinling Song, Feng Feng, Jiuran Zhao, Jinxiao Yang,
... CBE. As SpCas9-NG possessed lower activity on NGC PAM sites in human cells and rice (Nishimasu ... Supplemental Figure 3) and compared its activity on NGC sites with that of SpRYn-CBE. Both NGC-C1 and NGC-C2, which could be mutated by SpRYn-CBE, ... SpCas9n-NG-CBE (Supplemental Table 2). Another three NGC sites (NGC-C3 to NGC-C5) were then selected for further comparison (Supplemental ... did not induce base conversion except at the NGC-C5 site (Supplemental Table 2). These results suggest that for NGC PAM sites, SpRYn-CBE outperforms SpCas9n-NG-CBE ...
Tópico(s): Mosquito-borne diseases and control
2020 - Elsevier BV | Molecular Plant
T. J. Jones, C. D. Dowell, Enrique López-Rodríguez, Ellen G. Zweibel, Marc Berthoud, David T. Chuss, P. F. Goldsmith, Ryan T. Hamilton, Shaul Hanany, D. A. Harper, A. Lazarian, Leslie W. Looney, Joseph M. Michail, M. Morris, Giles Novak, Fábio P. Santos, Kartik Sheth, G. J. Stacey, Johannes Staguhn, Ian Stephens, Konstantinos Tassis, Christopher Q. Trinh, Carolyn G. Volpert, M. W. Werner, Edward J. Wollack,
... M82 at 53 and 154 μ m and NGC 253 at 89 μ m, which were taken ... the cooler (154 μ m) dust emission. For NGC 253, the polarization at 89 μ m is ... plane from the nucleus. The polarization observations of NGC 253 at 53 μ m were of a ...
Tópico(s): Astrophysics and Star Formation Studies
2019 - IOP Publishing | The Astrophysical Journal Letters
Hans H. Schild, P. A. Crowther, Jay B. Abbott, W. Schmütz,
... the central region of the nearby spiral galaxy NGC 300, based on deep VLT-FORS2 narrow-band ... low resolution FORS2 datasets. The WR population of NGC 300 now totals 60, a threefold increase over ... WR surface density in the central region of NGC 300. Finally, analyses are presented for two apparently ...
Tópico(s): Adaptive optics and wavefront sensing
2003 - EDP Sciences | Astronomy and Astrophysics
Francesco Paresce, Guido De Marchi,
... down to close to the hydrogen-burning limit (NGC 6341, NGC 6397, NGC 6752, and NGC 6809) can only be reproduced by such distributions ...
Tópico(s): Atmospheric Ozone and Climate
2000 - IOP Publishing | The Astrophysical Journal
A. S. Wilson, Yujin Yang, Gerald Cecil,
... high-resolution X-ray observations with Chandra of NGC 4258 and infers the nature of the so- ... down the galaxy disk rotation axis. However, because NGC 4258 is highly inclined (i = 64°), the line ...
Tópico(s): Astrophysical Phenomena and Observations
2001 - IOP Publishing | The Astrophysical Journal
We present emission-line fluxes for NGC 2452, NGC 7026, M3-30, and Lo 4 from IUE low-dispersion spectra that have been processed by the New Spectral Image Processing System (NEWSIPS). For NGC 2452, a terminal wind velocity of -4200 ± 300 km s-1 was determined from the C IV λ1549 P Cygni profile, while that of NGC 7026 is -4600 ± 300 km s-1, and -4800 ± 400 km s-1 for M3-30. The spectrum of Lo 4 is a stellar continuum with some absorptions and a questionable C IV λ1549 feature.
Tópico(s): Adaptive optics and wavefront sensing
1999 - IOP Publishing | The Astrophysical Journal
... ionization cones of the Type II Seyfert galaxy NGC 5728. Near-IR and optical data from the ... the dust temperature at the nuclear position is ~870 K. An X-ray jet is aligned with ...
Tópico(s): Astrophysical Phenomena and Observations
2018 - IOP Publishing | The Astrophysical Journal
M. Macháček, Ralph Kraft, C. Jones, W. Forman, M. J. Hardcastle,
... NGC4783 is moving east with a total velocity ~870+270-400 km/s (Mach ~1.4+0. ...
Tópico(s): Astrophysics and Cosmic Phenomena
2007 - IOP Publishing | The Astrophysical Journal