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We present a study of the properties of the star-cluster systems around pseudo-bulges of late-type spiral galaxies using a sample of 11 galaxies with distances from 17 to 37 Mpc. Star clusters are identified from multiband HST ACS and WFPC2…

宇宙学与河外天体物理 · 物理学 2015-05-14 Daiana Di Nino , Michele Trenti , Massimo Stiavelli , C. Marcella Carollo , Claudia Scarlata , Rosemary F. G. Wyse

While existing detectors would see a burst of many neutrinos from a Milky Way supernova, the supernova rate is only a few per century. As an alternative, we propose the detection of ~ 1 neutrino per supernova from galaxies within 10 Mpc, in…

天体物理学 · 物理学 2009-11-10 Shin'ichiro Ando , John F. Beacom , Hasan Yuksel

Large-scale astrophysics datasets present an opportunity for new machine learning techniques to identify regions of interest that might otherwise be overlooked by traditional searches. To this end, we use Classification Without Labels…

星系天体物理 · 物理学 2024-12-11 Mariel Pettee , Sowmya Thanvantri , Benjamin Nachman , David Shih , Matthew R. Buckley , Jack H. Collins

We present a study of the impact of different model groups in the detection of circumstellar debris disks. Almost all previous studies in this field have used Kurucz model spectra to predict the stellar contribution to the flux at the…

太阳与恒星天体物理 · 物理学 2014-10-23 J. A. Sinclair , Ch. Helling , J. S. Greaves

High-mass X-ray binaries are fundamental in the study of stellar evolution, nucleosynthesis, structure and evolution of galaxies and accretion processes. Hard X-rays observations by INTEGRAL and Swift have broad- ened significantly our…

高能天体物理现象 · 物理学 2015-09-02 Roland Walter , Alexander A. Lutovinov , Enrico Bozzo , Sergey S. Tsygankov

Observations at 70 microns with the Spitzer Space Telescope have detected several stellar systems within 65 pc of the Sun. Of 18 presumably young systems detected in this study, as many as 15 have 70-micron emission in excess of that…

We investigated the physical properties of molecular clouds and star formation processes around infrared bubbles which are essentially expanding HII regions. We performed observations of 13 galactic infrared bubble fields containing 18…

星系天体物理 · 物理学 2016-10-26 Qing-zeng Yan , Ye Xu , Bo Zhang , Deng-rong Lu , Xi Chen , Zheng-hong Tang

We measure the 4.5 $\mu$m thermal emission of five transiting hot Jupiters, WASP-13b, WASP-15b, WASP-16b, WASP-62b and HAT-P-22b using channel 2 of the Infrared Array Camera (IRAC) on the {\sl Spitzer Space Telescope}. Significant…

The Spitzer Space Telescope has advanced debris disk science tremendously with a wealth of information on debris disks around nearby A, F, G, K and M stars at 24 and 70 microns with the MIPS photometer and at 8-34 microns with IRS. Here we…

太阳与恒星天体物理 · 物理学 2015-05-13 Angelle Tanner , Charles Beichman , Geoff Bryden , Carey Lisse , Samantha Lawler

The current supernova detection technique used in IceCube relies on the sudden deviation of the summed photomultiplier noise rate from its nominal value during the neutrino burst, making IceCube a $\approx 3$ Megaton effective detection…

天体物理仪器与方法 · 物理学 2015-05-28 L. Demiroers , M. Ribordy , M. Salathe

We present a novel approach for classifying stars as binary or exoplanet using deep learning techniques. Our method utilizes feature extraction, wavelet transformation, and a neural network on the light curves of stars to achieve…

天体物理仪器与方法 · 物理学 2023-05-22 Aman Kumar , Sarvesh Gharat

We have identified four circumstellar disks with a deficit of dust emission from their inner 15-50 AU. All four stars have F-G spectral type, and were uncovered as part of the Spitzer Space Telescope ``Cores to Disks'' Legacy Program…

The mid-infrared emission from 18 nearby galaxies imaged with the IRAC instrument on Spitzer Space Telescope samples the spatial distributions of the reddening-free stellar photospheric emission and the warm dust in the ISM. These two…

天体物理学 · 物理学 2009-11-10 M. A. Pahre , M. L. N. Ashby , G. G. Fazio , S. P. Willner

We present our photometric method, which combines Subaru/HSC $NB515$, g, and i band filters to distinguish giant stars in Local Group galaxies from Milky Way dwarf contamination. The $NB515$ filter is a narrow-band filter that covers the…

This paper describes new deep 3.6 and 4.5 micron imaging of three UltraVISTA near-infrared survey stripes within the COSMOS field. The observations were carried out with Spitzer's Infrared Array Camera (IRAC) for the Spitzer Matching Survey…

The Coherent WaveBurst (cWB) search algorithm identifies generic gravitational wave (GW) signals in the LIGO-Virgo strain data. We propose a machine learning (ML) method to optimize the pipeline sensitivity to the special class of GW…

广义相对论与量子宇宙学 · 物理学 2021-07-21 Tanmaya Mishra , Brendan O'Brien , V. Gayathri , Marek Szczepanczyk , Shubhagata Bhaumik , Imre Bartos , Sergey Klimenko

The primary aim of this research is to evaluate several convolutional neural network-based object detection algorithms for identifying oscillation-like patterns in light curves of eclipsing binaries. This involves creating a robust…

太阳与恒星天体物理 · 物理学 2025-01-30 Burak Ulaş , Tamás Szklenár , Róbert Szabó

Distinguishing active galaxies from star-forming galaxies is essential for understanding galaxy evolution. Diagnostic methods like the BPT (Baldwin, Phillips, and Terlevich) diagram use optical emission-line ratios to separate galaxies.…

With the MIPS camera on Spitzer, we have searched for far-infrared emission from dust in the planetary system orbiting pulsar PSR 1257+12. With accuracies of 0.05 mJy at 24 um and 1.5 mJy at 70 um, photometric measurements find no evidence…

A number of well-motivated extensions of the LCDM concordance cosmological model postulate the existence of a population of sources embedded in the cosmic microwave background (CMB). One such example is the signature of cosmic bubble…

宇宙学与河外天体物理 · 物理学 2012-05-29 J. D. McEwen , S. M. Feeney , M. C. Johnson , H. V. Peiris