A. Weiß, C. Henkel, D. Downes, Fabian Walter,
... the 1.2mm continuum emission from H1413+117 (Cloverleaf quasar, z=2.5) using the IRAM interferometer. Together ... lower fine structure line (Barvainis etal. 1997), the Cloverleaf quasar is now only the second extragalactic system, besides ...
Tópico(s): Stellar, planetary, and galactic studies
2003 - EDP Sciences | Astronomy and Astrophysics
R. Kayser, Jean Surdej, J. J. Condon, K. I. Kellermann, P. Magain, M. Rémy, A. Smette,
... New Observations and Gravitational Lens Models of the Cloverleaf Quasar H1413+117 Kayser, R. ; Surdej, J. ; Condon, J. ... New optical and radio observations of the quadruple quasar H1413 + 117, the Cloverleaf, carried out with the 1.54 m Danish ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
1990 - IOP Publishing | The Astrophysical Journal
C. Henkel, D. Downes, A. Weiß, Dominik A. Riechers, Fabian Walter,
... 0.3 Jy km s -1 toward the Cloverleaf quasar at z = 2.5 . This is the first ... and may be even more severe in the Cloverleaf because of its young age (2.5 Gyr). A potential conflict with optical data, indicating high abundances also for secondary nuclei in quasars of high redshift, may be settled if the bulk of the CO emission is originating sufficiently far from the active galactic nucleus of the Cloverleaf.
Tópico(s): Astrophysical Phenomena and Observations
2010 - EDP Sciences | Astronomy and Astrophysics
Dominik A. Riechers, Fabian Walter, Christopher L. Carilli, P. Cox, A. Weiß, F. Bertoldi, K. M. Menten,
... of HCO+(J = 4 → 3) emission in the Cloverleaf Quasar at z = 2.56, using the IRAM Plateau ... concentrated. In contrast to the z = 3.91 quasar APM 08279+5255, the dense gas excitation in the Cloverleaf is consistent with being purely collisional, rather than ...
Tópico(s): Astrophysical Phenomena and Observations
2010 - IOP Publishing | The Astrophysical Journal
Raquel Rodriguez Monje, T. G. Phillips, R. Peng, D. C. Lis, D. A. Neufeld, M. Emprechtinger,
... phase along the line of sight to the Cloverleaf quasar. This observation corroborates the prediction that HF should ...
Tópico(s): Stellar, planetary, and galactic studies
2011 - IOP Publishing | The Astrophysical Journal Letters
Bade Uzgil, C. M. Bradford, S. Hailey-Dunsheath, Philip R. Maloney, James E. Aguirre,
... 35 μ m in the z = 2.56 Cloverleaf quasar, and combine them with published data in an ...
Tópico(s): Stellar, planetary, and galactic studies
2016 - IOP Publishing | The Astrophysical Journal
C. M. Bradford, James E. Aguirre, R. Aikin, J. J. Bock, L. Earle, J. Glenn, Hanae Inami, Philip R. Maloney, Hideo Matsuhara, B. J. Naylor, H. T. Nguyen, J. Žmuidzinas,
... 1 mm spectrum toward the z=2.56 Cloverleaf Quasar, obtained with Z-Spec, a 1-mm grating ...
Tópico(s): Astrophysics and Star Formation Studies
2009 - IOP Publishing | The Astrophysical Journal
Dominik A. Riechers, Fabian Walter, P. Cox, Christopher L. Carilli, A. Weiß, F. Bertoldi, R. Neri,
... of CN(N = 3 → 2) emission toward the Cloverleaf quasar (z = 2.56) based on observations with the ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2007 - IOP Publishing | The Astrophysical Journal
R. H. Østensen, M. Rémy, P. O. Lindblad, S. Refsdal, R. Stabell, Jean Surdej, P. D. Barthel, P.-I. Emanuelsen, L. Festin, E. Gosset, O. Hainaut, Pasi Hakala, M. Hjelm, J. Hjorth, Damien Hutsemékers, M. Jablonski, A. A. Kaas, H. Kristen, S. Larsson, Pierre Magain, B. Pettersson, Anna Pospieszalska-Surdej, A. Smette, J. Teuber, B. Thomsen, E. van Drom,
The Cloverleaf quasar, H1413+117, has been photometrically monitored at ESO (La Silla, Chile) and with the NOT (La Palma, ...
Tópico(s): Adaptive optics and wavefront sensing
1997 - EDP Sciences | Astronomy and Astrophysics Supplement Series
Min S. Yun, N. Z. Scoville, John Joseph M. Carrasco, R. D. Blandford,
... 7-6) observations of the z = 2.56 Cloverleaf quasar (H1413+117) and spatially resolved images. By modeling ...
Tópico(s): Astrophysics and Star Formation Studies
1997 - IOP Publishing | The Astrophysical Journal
Richard Barvainis, Robert Antonucci, Todd Hurt, Paul H. Coleman, H. P. Reuter,
... have constructed broadband spectral energy distributions for the Cloverleaf quasar (z = 2.56) and the luminous infrared galaxy ...
Tópico(s): Astronomy and Astrophysical Research
1995 - IOP Publishing | The Astrophysical Journal
Lei Zhang, Zhi-Yu Zhang, J. W. Nightingale, Ze-Cheng Zou, Xiaoyue Cao, Chao‐Wei Tsai, C. Yang, Yong Shi, Junzhi Wang, Dandan Xu, Lingrui Lin, Jing Zhou, Ran Li,
... Myr. This could indicate a feedback switching of Cloverleaf quasar from the jet mode to the quasar mode.
Tópico(s): Radio Astronomy Observations and Technology
2023 - Oxford University Press | Monthly Notices of the Royal Astronomical Society
Richard Barvainis, Philip R. Maloney, Robert Antonucci, D. Alloin,
... millimeter-wavelength emission lines are reported for the Cloverleaf (H1413+117), a gravitationally lensed quasar at redshift 2.56. High signal-to-noise ...
Tópico(s): Astrophysical Phenomena and Observations
1997 - IOP Publishing | The Astrophysical Journal
... ultraluminous infrared galaxies. We therefore suggest that the Cloverleaf contains both an extended rotating molecular starburst disk and a central quasar.
Tópico(s): Stellar, planetary, and galactic studies
2003 - IOP Publishing | The Astrophysical Journal
A. Weiß, D. Downes, C. Henkel, Fabian Walter,
... FSC 10214 (), SMM J14011+0252 () and H1413+117 (Cloverleaf quasar, ). SMM J14011+0252 is the first high–redshift, non–AGN source in which C I has been detected. The C I line from FSC 10214 is almost an order of magnitude weaker than previously claimed, while our detection in the Cloverleaf is in good agreement with earlier observations. The ...
Tópico(s): Gamma-ray bursts and supernovae
2004 - EDP Sciences | Astronomy and Astrophysics
Richard Barvainis, D. Alloin, S. Guilloteau, Robert Antonucci,
... than, that of IRAS F10214+4724 and the Cloverleaf quasar (H1413+117), both of which are at similar ...
Tópico(s): Astrophysics and Star Formation Studies
1998 - IOP Publishing | The Astrophysical Journal
Taku Nakajima, Kimihiko Kimura, Atsushi Nishimura, Hiroyuki Iwashita, Chieko Miyazawa, Takeshi Sakai, Daisuke Iono, Kotaro Kohno, Ryohei Kawabe, Nario Kuno, Hideo Ogawa, Shin’ichiro Asayama, T. Tamura, Takashi Noguchi,
... 12CO (J = 3–2) emission line toward a cloverleaf quasar at z = 2.56, which validates the performance ...
Tópico(s): Astrophysics and Cosmic Phenomena
2013 - Institute of Physics | Publications of the Astronomical Society of the Pacific
G. Chartas, Michael Eracleous, Xinyu Dai, Eric Agol, S. C. Gallagher,
We present results from Chandra and XMM-Newton observations of the low-ionization broad absorption line (LoBAL) quasar H 1413+117. Our spatial and spectral analysis of a recent deep Chandra observation confirms a microlensing event in a previous Chandra observation performed about 5 years earlier. We present constraints on the structure of the accretion flow in H 1413+117 based on the time-scale of this microlensing event. Our analysis of the combined spectrum of all the images indicates the presence ...
Tópico(s): Astrophysics and Cosmic Phenomena
2007 - IOP Publishing | The Astrophysical Journal
Dominik A. Riechers, Fabian Walter, Christopher L. Carilli, A. Weiß, F. Bertoldi, K. M. Menten, K. K. Knudsen, P. Cox,
... detection of HCO+(1-0) emission towards the Cloverleaf quasar (z=2.56) through observations with the Very ...
Tópico(s): Stellar, planetary, and galactic studies
2006 - IOP Publishing | The Astrophysical Journal
G. Chartas, Michael Eracleous, Eric Agol, S. C. Gallagher,
We present new results uncovered by a re-analysis of a Chandra observation of the gravitationally lensed, low-ionization broad absorption line (LoBAL) quasar H 1413+117. Previous analyses of the same Chandra observation led to the detection of a strong, redshifted Fe Kalpha line from the combined spectrum of all images. We show that the redshifted Fe Kalpha line is only significant in the brighter image A. The X-ray flux fraction of image A is larger by a factor of 1.55 +/- 0.17 than the optical R-band ...
Tópico(s): Adaptive optics and wavefront sensing
2004 - IOP Publishing | The Astrophysical Journal
P. M. Solomon, Paul A. Vanden Bout, C. L. Carilli, M. Guélin,
... observations of HCN emission from the infrared-luminous 'Cloverleaf' quasar (at a redshift zeta = 2.5579). The HCN ...
Tópico(s): Astrophysical Phenomena and Observations
2003 - Nature Portfolio | Nature
Masato Tsuboi, Atsushi Miyazaki, Satoshi Imaizumi, Naomasa Nakai,
... 1-0) line emission toward the gravitational lensed “Cloverleaf„ quasar, H1413+117, at z – 2.56 using the ...
Tópico(s): Astrophysical Phenomena and Observations
1999 - Oxford University Press | Publications of the Astronomical Society of Japan
G. L. Granato, L. Danese, A. Franceschini,
... flow, and the optically selected broad absorption line "Cloverleaf" quasar, are all fitted by the same solution for ...
Tópico(s): Astronomy and Astrophysical Research
1996 - IOP Publishing | The Astrophysical Journal
David J. Wilner, Jun‐Hui Zhao, Paul T. P. Ho,
... lines toward H1413+117, the z = 2.56 "cloverleaf" quasar, obtained simultaneously with the BIMA. These observations, with ...
Tópico(s): Astrophysical Phenomena and Observations
1995 - IOP Publishing | The Astrophysical Journal
Richard Barvainis, L. J. Tacconi, Robert Antonucci, D. Alloin, Paul H. Coleman,
Tópico(s): Astronomy and Astrophysical Research
1994 - Nature Portfolio | Nature
Tópico(s): Astrophysics and Star Formation Studies
1996 - Springer Nature (Netherlands) | Astrophysics and space science library
Dominique Sluse, Damien Hutsemékers, T. Anguita, L. Braibant, Pierre Riaud,
Testing the standard Shakura-Sunyaev model of accretion is a challenging task because the central region of quasars where accretion takes place is unresolved with telescopes. The analysis of microlensing in gravitationally lensed quasars is one of the few techniques that can test this model, yielding to the measurement of the size and of temperature profile of the accretion disc. We present spectroscopic observations of the gravitationally lensed broad absorption line quasar H1413+117, which reveal ...
Tópico(s): Astrophysics and Star Formation Studies
2015 - EDP Sciences | Astronomy and Astrophysics
M. Guélin, C. Krämer, C. Yang, B. Tercero, J. Cernicharo,
... mm/sub-mm spectral line survey of the Cloverleaf Quasar (z=2.6), the archetype of gravitationally lensed quasars. We identify 14 molecular species, including rare isotopologues of CO and ...
Tópico(s): Galaxies: Formation, Evolution, Phenomena
2022 - EDP Sciences | EPJ Web of Conferences
Hannah Stacey, Fabrizio Arrigoni Battaia,
... deep observations of CO (3–2) from the Cloverleaf lensed quasar-starburst at z = 2.56. We discover a ... molecular gas in the spectral line of the Cloverleaf that may be an outflow induced by stellar or quasar feedback. All of these features may be ubiquitous ...
Tópico(s): Gamma-ray bursts and supernovae
2022 - Oxford University Press | Monthly Notices of the Royal Astronomical Society Letters
G. Chartas, Michael Eracleous, Xinyu Dai, Eric Agol, S. C. Gallagher,
Abstract Our spatial and spectral analysis of a recent deep Chandra observation of H1413+117 confirms a microlensing event in a previous Chandra observation of this object performed about 5 years earlier. We present constraints on the structure of H1413+117 based on the time‐scale of this microlensing event. The analysis of the combined spectrum of the images indicates the presence of two emission line peaks at rest‐frame energies of 5.35 keV and 6.32 keV and detected at the ≳97% and ≳99% confidence ...
Tópico(s): Astrophysics and Star Formation Studies
2006 - Wiley | Astronomische Nachrichten