Results 61 to 70 of about 202 (183)
H i Clouds in LITTLE THINGS Dwarf Irregular Galaxies [PDF]
The Astronomical Journal, 2019 Abstract We identify 814 discrete H i clouds in 40 dwarf irregular galaxies from the LITTLE THINGS survey using an automated cloud-finding algorithm. The cloud masses range from ∼103 to 107 M ⊙, have a surface density averaged over all of the clouds of ∼9.65 M ⊙ pc−2, and constitute 2%
Deidre A. Hunter +2 more
openaire +2 more sources
Mass‐Loss, Composition and Observational Signatures of Stellar Winds From X‐Ray Bursts
Astronomische Nachrichten, Volume 346, Issue 1, January 2025.ABSTRACT X‐Ray bursts (XRBs) are powerful thermonuclear events on the surface of accreting neutron stars (NSs), which can synthesize intermediate‐mass elements. Although the high surface gravity prevents an explosive ejection, a small fraction of the envelope may be ejected by radiation‐driven winds.
Yago Herrera +4 more
wiley +1 more source
Holmberg IX: A Unique, Infant but Inactive Galaxy as Revealed via a Multiwavelength Approach
The Astrophysical Journal LettersIn this Letter, we report a novel discovery of unique characteristics for the tidal dwarf galaxy (candidate) Holmberg IX via a multiwavelength investigation.
Ye-Wei Mao +4 more
doaj +1 more source
Stellar Abundances in Dwarf Irregular Galaxies
, 2003 Dwarf irregular galaxies appear to have undergone very slow chemical evolution since they have low nebular abundances, but have had ongoing star formation over the past 15 Gyr. They are too distant for red giant abundance analyses to examine the details of their chemical evolution, however the isolated, bright blue supergiants do allow us to determine ...
Venn, K.A. +3 more
openaire +3 more sources
Commodity risk assessment of Betula pendula and Betula pubescens plants from the UK
EFSA Journal, Volume 22, Issue 11, November 2024.Abstract The European Commission requested the EFSA Panel on Plant Health to prepare and deliver risk assessments for commodities listed in Commission Implementing Regulation (EU) 2018/2019 as ‘High risk plants, plant products and other objects’. This Scientific Opinion covers plant health risks posed by plants of Betula pendula and B.
EFSA Panel on Plant Health (PLH) +32 more
wiley +1 more source
A Luminous X-Ray Active Galactic Nucleus in the Dwarf–Dwarf Galaxy Merger RGG 66
The Astrophysical JournalWe present the discovery of a luminous X-ray active galactic nucleus (AGN) in the dwarf galaxy merger RGG 66. The black hole is predicted to have a mass of M _BH ∼ 10 ^5.4 M _⊙ and to be radiating close to its Eddington limit ( L _bol / L _Edd ∼ 0.75 ...
Seth J. Kimbrell, Amy E. Reines
doaj +1 more source
The Astrophysical JournalWe present an imaging survey of the Spitzer I star-forming region in NGC 6822 conducted with the NIRCam and MIRI instruments on board JWST. Located at a distance of 490 kpc, NGC 6822 is the nearest non-interacting low-metallicity (∼0.2 Z _⊙ ) dwarf ...
Laura Lenkić +10 more
doaj +1 more source
Kinematics of the Ionized Gas in Dwarf Irregular Galaxies [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractSome preliminary results focused on the kinematics and dynamics of the ionized gas in the Local Group dwarf irregular galaxy IC10 are presented.
Margarita Valdez-Gutiérrez +1 more
openaire +1 more source
The Karl G. Jansky Very Large Array Local Group L-Band Survey (LGLBS)
The Astrophysical Journal Supplement SeriesWe present the Local Group L -Band Survey, a Karl G. Jansky Very Large Array (VLA) survey producing the highest-quality 21 cm and 1–2 GHz radio continuum images to date, for the six VLA-accessible, star-forming, Local Group galaxies. Leveraging the VLA’s
Eric W. Koch +47 more
doaj +1 more source
The Astrophysical Journal, 2023 We conducted an optical monitoring survey of the Sagittarius dwarf irregular galaxy (SagDIG) during the period of 2016 June–2017 October, using the 2.5 m Isaac Newton Telescopeat La Palama.
Tahere Parto +9 more
doaj +1 more source