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The Wisconsin H-Alpha Mapper (WHAM) Northern Sky Survey is revealing that many intermediate-velocity (|v_LSR| <= 100 km/s) neutral clouds and complexes have an associated ionized component. We present the first map of the H-Alpha emission…

天体物理学 · 物理学 2009-11-06 L. M. Haffner , R. J. Reynolds , S. L. Tufte

We present a joint analysis of the overlapping BLAST 250, 350, 500um, and LABOCA 870um observations (from the LESS survey) of the ECDF-S. Out to z~3, the BLAST filters sample near the peak wavelength of far-infrared (FIR) emission from…

Near the 10 solar radius perihelion of Parker Solar Probe encounter 24, a confined region containing an enhanced plasma density (25,000 per cubic centimeter) and broadband electrostatic waves was encountered. The solar wind velocity (200…

空间物理 · 物理学 2026-02-24 Forrest Mozer , Oleksiy Agapitov , Kyungeun Choi , Andrii Voshchepynets

We present observations of persistent oscillations of some bright features in the upper-chromosphere/transition-region above sunspots taken by IRIS SJ 1400 {\AA} and upward propagating quasi-periodic disturbances along coronal loops rooted…

太阳与恒星天体物理 · 物理学 2018-03-21 Zhenyong Hou , Zhenghua Huang , Lidong Xia , Bo Li , Hui Fu

Moving structures have been detected in coronal bright points and in a solar flare in active regions, which were bi-directional, symmetrical, simultaneous, and quasi-periodic (Ning & Guo 2014; Ning 2016; Li et al. 2016a). They could be…

太阳与恒星天体物理 · 物理学 2022-06-01 Dong Li

We investigate expected sub-mm emission and dust properties of the Lyman Break Galaxies (LBGs) in the Hubble Deep Field (HDF). The SCUBA Deep Survey (Hughes et al., 1998) provides an upper limit of the 850 micron flux densities of the LBGs.…

天体物理学 · 物理学 2009-10-31 Masami Ouchi , Toru Yamada , Hideaki Kawai , Kouji Ohta

We study point-like explosive events (EE), characterized by emission in the far wings of spectral lines, in a quiet region near the South Pole, using Interface Region Imaging Spectrograph (IRIS) spectra at two slit positions, slit-jaw (SJ)…

太阳与恒星天体物理 · 物理学 2023-02-08 C. E. Alissandrakis , J. -C. Vial

We search for persistent and quasi-periodic release events of streamer blobs during 2007 with the Large Angle Spectrometric Coronagraph on the \textit{Solar and Heliospheric Observatory} and assess the velocity of the slow solar wind along…

太阳与恒星天体物理 · 物理学 2015-05-13 H. Q. Song , Y. Chen , K. Liu , S. W. Feng , L. D. Xia

Above-threshold light emission from plasmonic tunnel junctions, when emitted photons have energies significantly higher than the energy scale of the incident electrons, has attracted much recent interest in nano-optics, while the underlying…

介观与纳米尺度物理 · 物理学 2020-12-08 Longji Cui , Yunxuan Zhu , Mahdiyeh Abbasi , Arash Ahmadivand , Burak Gerislioglu , Peter Nordlander , Douglas Natelson

Recent work has revealed that the light curves of hydrogen-poor (Type I) superluminous supernovae (SLSNe), thought to be powered by magnetar central engines, do not always follow the smooth decline predicted by a simple magnetar spin-down…

高能天体物理现象 · 物理学 2022-07-14 Griffin Hosseinzadeh , Edo Berger , Brian D. Metzger , Sebastian Gomez , Matt Nicholl , Peter Blanchard

Delta ($\delta$) sunspots sometimes host fast photospheric flows along the central magnetic polarity inversion line (PIL). Here we study the strong Doppler shift signature in the central penumbral light bridge of solar active region NOAA…

太阳与恒星天体物理 · 物理学 2023-07-20 Jiayi Liu , Xudong Sun , Peter W. Schuck , Sarah A. Jaeggli , Brian T. Welsch , Carlos Quintero Noda

Three-dimensional magnetic reconnection is a fundamental plasma process crucial for heating the solar corona and generating the solar wind, but resolving and characterizing it on the Sun remains challenging. Using high-quality data from the…

Active regions are the most prominent manifestations of solar magnetic fields; their generation and dissipation are fundamental problems in solar physics. Light bridges are commonly present during sunspot decay, but a comprehensive picture…

We report observations of bright dots (BDs) in a sunspot penumbra using High Resolution Coronal Imager (Hi-C) data in 193 \AA\ and examine their sizes, lifetimes, speeds, and intensities. The sizes of the BDs are on the order of 1\arcsec\…

太阳与恒星天体物理 · 物理学 2016-05-25 Shane E. Alpert , Sanjiv K. Tiwari , Ronald L. Moore , Amy R. Winebarger , Sabrina L. Savage

We analyse the early-time optical light curves (LCs) of 20 Type Ib/c supernovae (SNe Ib/c) from the Sloan Digital Sky Survey (SDSS) SN survey II, aiming to study their properties as well as to derive their progenitor parameters.…

高能天体物理现象 · 物理学 2015-01-28 F. Taddia , J. Sollerman , G. Leloudas , M. D. Stritzinger , S. Valenti , L. Galbany , R. Kessler , D. P. Schneider , J. C. Wheeler

Penumbral microjets are short-lived, fine-structured and bright jets that are generally observed in chromospheric imaging of the penumbra of sunspots. Here we investigate their potential transition region signature, by combining…

太阳与恒星天体物理 · 物理学 2015-10-08 Gregal J. M. Vissers , Luc H. M. Rouppe van der Voort , Mats Carlsson

We study the kinematic properties of the ambient ionized ISM and ionized gas outflows in a large and representative sample of local luminous and ultraluminous infrared galaxies (U/LIRGs) (58 systems, 75 galaxies), on the basis of integral…

星系天体物理 · 物理学 2014-09-05 Santiago Arribas , Luis Colina , Enrica Bellocchi , Roberto Maiolino , Montserrat Villar-Martin

We present results from the investigation of 5-min umbral oscillations in a single-polarity sunspot of active region NOAA 12132. The spectra of TiO, H$\alpha$, and 304 \AA{} are used for corresponding atmospheric heights from the…

太阳与恒星天体物理 · 物理学 2018-01-10 T. G. Priya , Wenda Cao , Jiangtao Su , Jie Chen , Xinjie Mao , Yuanyong Deng , Robert Erdélyi

We report on spectro-imaging observations of the Herbig-Haro 2 outflow with the ISOCAM camera onboard the Infrared Space Observatory (ISO). The [Ne II}] 12.81 microns and [Ne III]15.55 microns lines are detected only towards the jet working…

天体物理学 · 物理学 2009-11-07 B. Lefloch , J. Cernicharo , S. Cabrit , A. Noriega-Crespo , A. Moro-Martin , D. Cesarsky

Fast Radio Bursts are millisecond bursts of radio radiation at frequencies of about 1 GHz, recently discovered in pulsar surveys. They have not yet been definitively identified with any other astronomical object or phenomenon. The bursts…

高能天体物理现象 · 物理学 2016-05-10 J. I. Katz