English
Related papers

Related papers: Epsilon Aurigae: An improved spectroscopic orbital…

200 papers

V454 Aur is an eclipsing binary system containing two solar-type stars on an orbit of relatively long period (P = 27.02 d) and large eccentricity (e = 0.381). Eclipses were detected using data from the Hipparcos satellite, and a…

Solar and Stellar Astrophysics · Physics 2024-05-13 John Southworth

The eclipsing polar CSS081231 turned bright (V_max ~ 14.5) in late 2008 and was subsequently observed intensively with small and medium-sized telescopes. A homogeneous analysis of this comprehensive dataset comprising 109 eclipse epochs is…

Solar and Stellar Astrophysics · Physics 2015-06-23 A. D. Schwope , F. Mackebrandt , B. D. Thinius , C. Littlefield , P. Garnavich , A. Oksanen , T. Granzer

Investigating long series of spectral and photometric observations, we found that the orbital elements of epsilon Aur are subject to much larger uncertainties than usually believed. The H alpha emission is found to move basically with the F…

Solar and Stellar Astrophysics · Physics 2013-03-27 P. Harmanec , H. Božić , D. Korčáková , L. Kotková , P. Škoda , M. Šlechta , M. Švanda , V. Votruba , M. Wolf , P. Zasche , A. Henden , J. Ribeiro

AR Aur is a detached eclipsing binary containing two late-B stars which are chemically peculiar, on a circular orbit of period 4.135 d. The primary is a HgMn star which shows temporal changes in its chemical abundances and spectral line…

Solar and Stellar Astrophysics · Physics 2025-07-30 John Southworth

We report 11 yr of spectroscopic monitoring of the M-type asymptotic giant branch star eta Gem, a semiregular variable and a known spectroscopic binary with a period of 8.2 yr. We combine our radial velocities with others from the…

Solar and Stellar Astrophysics · Physics 2022-08-31 Guillermo Torres , Kristy Sakano

In this Letter, the radial velocity variability of the chemically peculiar star Epsilon Ursae Majoris ($\epsilon$ UMa) from the sharp cores of the hydrogen lines is investigated. This study is based on the ELODIE archival data obtained at…

Solar and Stellar Astrophysics · Physics 2011-02-11 N. A. Sokolov

We present new multiband CCD photometry for AA UMa made on 8 nights between January and March 2009; the $R$ light curves are the first ever compiled. Historical light curves, as well as ours, display partial eclipses and inverse O'Connell…

Solar and Stellar Astrophysics · Physics 2015-05-20 Jae Woo Lee , Chung-Uk Lee , Seung-Lee Kim , Ho-Il Kim , Jang-Ho Park

XTE J1710-281 is a transient eclipsing binary system with a period close to 3.28 hours, hosting a neutron star. The average eclipse duration is 420 seconds, and eclipse arrival times reported in the literature span from 1999 to 2017. A…

High Energy Astrophysical Phenomena · Physics 2024-06-19 R. Iaria , T. Di Salvo , A. Anitra , C. Miceli , W. Leone , C. Maraventano , F. Barra , A. Riggio , A. Sanna , A. Manca , L. Burderi

Variations in the equivalent width of the neutral potassium line at 7699A are reported, during ingress and into totality of the current eclipse of the enigmatic eclipsing binary epsilon Aurigae. The increase and plateaus of line strength…

Solar and Stellar Astrophysics · Physics 2010-03-22 Robin Leadbeater , Robert Stencel

We report high-resolution (R = 30\ 000, 45\ 000 and 75\ 000) echelle and medium-resolution (R = 22\ 000 and 10\ 000) spectroscopic observations of the long-period, eclipsing binary $\epsilon$ Aurigae during the 2009 - 2011 eclipse.…

Solar and Stellar Astrophysics · Physics 2015-06-22 C. Muthumariappan , M. Parthasarathy , R. Leadbeater , I. S. Potravnov , M. Appakutty , K. Jayakumar

HS0907+1902 was recently discovered to be one of a handful of deeply eclipsing dwarf novae with periods longward of the 2 -- 3 hr `gap'. This paper presents orbit-resolved spectra and time series photometry of an eclipse. The apparent…

Astrophysics · Physics 2009-10-31 John R. Thorstensen

New photometric, spectroscopic, and eclipse timing observations of the eclipsing binary star HP Aur allow for very accurate orbital determinations, even in the presence of a third body and transient starspot activity. The eclipsing binary…

Solar and Stellar Astrophysics · Physics 2015-06-17 Claud H. Sandberg Lacy , Guillermo Torres , Marek Wolf , Charles L. Burks

For the ordinary classical nova QZ Aurigae (which erupted in 1964), we report 1317 magnitudes from 1912--2016, including four eclipses detected on archival photographic plates from long before the eruption. We have accurate and robust…

We have assembled new Spitzer Space Telescope Infrared Array Camera observations of the mysterious binary star Epsilon Aurigae, along with archival far-ultraviolet to mid-infrared data, to form an unprecedented spectral energy distribution…

Solar and Stellar Astrophysics · Physics 2015-05-18 D. W. Hoard , S. B. Howell , R. E. Stencel

We report extensive radial-velocity measurements of the two giant components of the detached, 104-day period binary system of Capella. Our highly accurate three-dimensional orbital solution based on all existing spectroscopic and…

Solar and Stellar Astrophysics · Physics 2009-07-22 Guillermo Torres , Antonio Claret , Patrick A. Young

We report the discovery of a deep, singular eclipse of the bona fide brown dwarf Roque 12, a substellar member of the Pleiades. The eclipse was 0.65mag deep, lasted 1.3h, and was observed with two telescopes simultaneously in October 2002.…

Solar and Stellar Astrophysics · Physics 2020-07-30 Aleks Scholz , Dirk Froebrich , Koraljka Muzic , Jochen Eislöffel

We report the discovery of eclipses by circumstellar disc material associated with the young star PDS 110 in the Ori OB1a association using the SuperWASP and KELT surveys. PDS 110 (HD 290380, IRAS 05209-0107) is a rare Fe/Ge-type star, a…

We present the first extensive photometric results of CL Aur from our BVRI CCD photometry made on 22 nights from 2003 November through 2005 February. Fifteen new timings of minimum light were obtained. During the past 104 years, the orbital…

Solar and Stellar Astrophysics · Physics 2015-05-18 Jae Woo Lee , Chun-Hwey Kim , Duck Hyun Kim , Seung-Lee Kim , Chung-Uk Lee , Robert H. Koch

Context: Worldwide interest in the recent eclipse of epsilon Aurigae resulted in the generation of several extensive data sets, including those related to high resolution spectroscopic monitoring. This lead to the discovery, among other…