Detecting Feedback Vertex Sets of Size k in O ⋆ (2.7 k ) Time [PDF]
ACM Transactions on Algorithms, 2022 In the Feedback Vertex Set (FVS) problem, one is given an undirected graph G and an integer k , and one needs to determine whether there exists a set of k vertices that intersects all cycles of G (a so-called feedback vertex set).
Jason Li, Jesper Nederlof
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CONSTRAINTS ON HYPERLUMINOUS QSO LIFETIMES VIA FLUORESCENT Lyα EMITTERS AT Z ≃ 2.7 [PDF]
The Astrophysical Journal, 2013 We present observations of a population of Lya emitters (LAEs) exhibiting fluorescent emission via the reprocessing of ionizing radiation from nearby hyperluminous QSOs. These LAEs are part of a survey at redshifts 2.5 < z < 2.9 combining narrow-band photometric selection and spectroscopic follow-up to characterize the emission mechanisms ...
Ryan F. Trainor, Charles C. Steidel
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Discovery of a Large ∼200 kpc Gaseous Nebula atz≈ 2.7 with theSpitzer Space Telescope [PDF]
The Astrophysical Journal, 2005 We report the discovery of a very large, spatially extended Ly alpha -emitting nebula at z=2.656 associated with a luminous mid-infrared source. The bright mid-infrared source (F(24um)=0.86 mJy) was first detected in observations made using the Spitzer Space Telescope.
Arjun Dey +13 more
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A New Einstein Cross: A Highly Magnified, Intrinsically Faint Lyα Emitter at z = 2.7 [PDF]
The Astrophysical Journal, 2006 We report the discovery of a new Einstein cross at redshift z_S = 2.701 based on Lyman-alpha emission in a cruciform configuration around an SDSS luminous red galaxy (z_L = 0.331). The system was targeted as a possible lens based on an anomalous emission line in the SDSS spectrum. Imaging and spectroscopy from the W. M.
A. Bolton +5 more
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OGLE-2018-BLG-0799Lb: a q ∼ 2.7 × 10−3 planet with Spitzer parallax [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We report the discovery and analysis of a planet in the microlensing event OGLE-2018-BLG-0799. The planetary signal was observed by several ground-based telescopes, and the planet-host mass ratio is q = (2.65 ± 0.16) × 10−3. The ground-based observations yield a constraint on the angular Einstein radius θE, and the microlensing ...
Weicheng Zang +75 more
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PINPOINTING THE MOLECULAR GAS WITHIN AN Lyα BLOB ATz∼ 2.7 [PDF]
The Astrophysical Journal, 2014 12 pages, 9 figures, accepted for publication in ...
Yujin Yang +7 more
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THE HALO MASSES AND GALAXY ENVIRONMENTS OF HYPERLUMINOUS QSOs ATz≃ 2.7 IN THE KECK BARYONIC STRUCTURE SURVEY [PDF]
The Astrophysical Journal, 2012 15 pages, 6 figures.
Ryan F. Trainor, Charles C. Steidel
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The Overdense Environment of a Large Lyα Nebula at z ≈ 2.7 [PDF]
The Astrophysical Journal, 2008 Accepted for publication in ApJL; 8 pages, 4 figures, emulateapj ...
Moire K. M. Prescott +3 more
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Less and more IGM-transmitted galaxies from z ∼ 2.7 to z ∼ 6 from VANDELS and VUDS [PDF]
Astronomy & Astrophysics, 2021 Aims. Our aim is to analyze the variance of the intergalactic medium (IGM) transmission by studying this parameter in the rest-frame UV spectra of a large sample of high-redshift galaxies. Methods. We made use of the VIMOS Ultra Deep Survey and the VANDELS public survey to gain insight into the far UV spectrum of 2.7 < z < 6 galaxies.
R. Thomas +24 more
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THE END OF HELIUM REIONIZATION AT z ≃ 2.7 INFERRED FROM COSMIC VARIANCE IN HST /COS He II Lyα ABSORPTION SPECTRA [PDF]
The Astrophysical Journal, 2011 We report on the detection of strongly varying intergalactic HeII absorption in HST/COS spectra of two z~3 quasars. From our homogeneous analysis of the HeII absorption in these and three archival sightlines, we find a marked increase in the mean HeII effective optical depth from tau~1 at z~2.3 to tau>5 at z~3.2, but with a large scatter of 2< ...
G. Worseck +8 more
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