Results 71 to 80 of about 10,527 (159)

The photometric properties of a vast stellar substructure in the outskirts of M33

, 2010
We have surveyed $\sim40$sq.degrees surrounding M33 with CFHT MegaCam in the g and i filters, as part of the Pan-Andromeda Archaeological Survey. Our observations are deep enough to resolve the top 4mags of the red giant branch population in this galaxy.
Aaron Dotter, Alan W. McConnachie, Annette M. N. Ferguson, Barker, Bohlin, Bonanos, Chandar, Ciardullo, Clem, Corbelli, Da Costa, Dotter, Dotter, Ferguson, Ferguson, Geraint F. Lewis, Huxor, Ibata, Irwin, Irwin, John Dubinski, Lawrence M. Widrow, Magrini, Martin, Martin, McConnachie, McConnachie, Michael J. Irwin, Purcell, Putman, Rocha-Pinto, Rodrigo Ibata, Sarajedini, Schlegel, Stonkutė, Tiede, U, Zucker, Zucker   +38 more
core   +1 more source

New luminous blue variables in the Andromeda galaxy [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We performed spectroscopy of five Luminous Blue Variable (LBV) candidates and two known LBV stars (AE And and Var A-1) in M31. We obtained the same-epoch near-infrared (NIR) and optical spectra of these stars. The NIR spectra were taken with Triplespec spectrograph at the 3.5-m telescope at Apache Point Observatory, and the optical spectroscopy was ...
Sholukhova O., Bizyaev D., Fabrika S., Sarkisyan A., Malanushenko V., Valeev A.   +5 more
openaire   +4 more sources

Reflecting on Our Present Self‐Awareness of Not Having Found Any Life Beyond Earth

Earth and Space Science, Volume 11, Issue 1, January 2024.
Abstract Ever gazed at the stars and wondered if we’re alone? Scientists have been on a quest to find life beyond Earth, but no aliens yet. It’s tough because space is huge, and potential life is incredibly far away, making it difficult to detect their signals. Despite this, our ability to search is improving.
Stuart F. Taylor, Jonathan H. Jiang, Nick Searra, Philip E. Rosen   +3 more
wiley   +1 more source

The distance to the Andromeda galaxy from eclipsing binaries [PDF]

Astronomy and Astrophysics, 2010
7 pages, 3 figures, accepted for publication in A&A (Nov 6, 2009)
Vilardell, Francesc, Ribas, Ignasi, Jordi, Carme, Fitzpatrick, Edward L., Guinan, Edward F.   +4 more
openaire   +3 more sources

On the Blueshift of the Andromeda Galaxy

Communications of the Byurakan Astrophysical Observatory
The observed spectral shift of galaxies is usually interpreted using the Doppler effect. However, attention should be paid to other possible mechanisms of spectral shift. For example, suppose baryon matter evolves due to interaction with the carrier of dark energy.
H. A. Harutyunian, A. A. Torosyan
openaire   +1 more source

VERITAS Observations of M31 (the Andromeda Galaxy) [PDF]

Proceedings of The 34th International Cosmic Ray Conference — PoS(ICRC2015), 2016
Diffuse gamma rays are tracers of cosmic rays, providing information on their origin, interaction and diffusion through a galaxy. M 31 (the Andromeda Galaxy) is the closest spiral galaxy to the Milky Way (d = 780 kpc) and is very well studied at all wavelengths. Thus it is a prime target for the study of diffuse gamma-ray emission. The very-high-energy
openaire   +2 more sources

THE LUMINOSITY PROFILE AND STRUCTURAL PARAMETERS OF THE ANDROMEDA GALAXY [PDF]

The Astrophysical Journal, 2011
We have constructed an extended composite luminosity profile for the Andromeda galaxy, M31, and have decomposed it into three basic luminous structural components: a bulge, a disk and a halo. The dust-free Spitzer/IRAC imaging and extended spatial coverage of ground-based optical imaging and deep star counts allow us to map M31's structure from its ...
Courteau, Stephane, Widrow, Lawrence M., McDonald, Michael A., Guhathakurta, Puragra, Gilbert, Karoline M., Zhu, Yucong, Beaton, Rachael Lynn, Majewski, Steven R.   +7 more
openaire   +3 more sources

A trio of new Local Group galaxies with extreme properties

, 2008
We report on the discovery of three new dwarf galaxies in the Local Group. These galaxies are found in new CFHT/MegaPrime g,i imaging of the south-western quadrant of M31, extending our extant survey area to include the majority of the southern ...
Alan W. McConnachie, Annette M. N. Ferguson, Avon Huxor, Geraint F. Lewis, Gregory Fahlman, Harvey Richer, Irwin M., Karachentsev I. D., Lynden-Bell D., Lynden-Bell D., Mike J. Irwin, Nial R. Tanvir, Nicolas F. Martin, Rodrigo A. Ibata, Salaris M., Scott C. Chapman, Sharina M. E.   +16 more
core   +1 more source

Disk‐Bulge‐Halo Models for the Andromeda Galaxy [PDF]

The Astrophysical Journal, 2003
We present a suite of semi-analytic disk-bulge-halo models for the Andromeda galaxy (M31) which satisfy three fundamental conditions: (1) internal self-consistency; (2) consistency with observational data; and (3) stability of the disk against the formation of a central bar. The models are chosen from a set first constructed by Kuijken and Dubinski. We
Widrow, Lawrence M., Perrett, Kathryn M., Suyu, Sherry H.   +2 more
openaire   +2 more sources

Catching the Wave: Detecting Strain-Specific SARS-CoV-2 Peptides in Clinical Samples Collected during Infection Waves from Diverse Geographical Locations. [PDF]

Viruses, 2022
Mehta S, Carvalho VM, Rajczewski AT, Pible O, Grüning BA, Johnson JE, Wagner R, Armengaud J, Griffin TJ, Jagtap PD.   +9 more
europepmc   +1 more source