SPECKLE INTERFEROMETRY AT THE BLANCO AND SOAR TELESCOPES IN 2008 AND 2009

By A. Tokovinin, B. Mason, W. Hartkopf. 2009

342 citations recorded by the source corpus.

The results of speckle interferometric measurements of binary and multiple stars conducted in 2008 and 2009 at the Blanco and SOAR 4 m telescopes in Chile are presented. A total of 1898 measurements of 1189 resolved pairs or sub-systems and 394 observations of 285 un-resolved targets are listed. We resolved for the first time 48 new pairs, 21 of which are new sub-systems in close visual multiple stars. Typical internal measurement precision is 0.3 mas in both coordinates, typical companion detection capability is Δm ∼ 4.2 at 0.″15 separation. These data were obtained with a new electron-multiplication CCD camera; data processing is described in detail, including estimation of magnitude difference, observational errors, detection limits, and analysis of artifacts. We comment on some newly discovered pairs and objects of special interest.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/ddb523c1f956a4c8d2da8f593deda4e2ead239df

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In Astronomy and Astrophysics

1. A. Tokovinin
2. B. Mason
3. W. Hartkopf
4. Rolf Chini
5. K. Fuhrmann
6. A. Mann
7. D. Gies
8. T. T. ten Brummelaar

In Atomic and Molecular Physics, and Optics

1. B. Mason
2. A. Tokovinin
3. W. Hartkopf
4. D. Gies
5. A. Mann
6. S. Ridgway
7. H. Zinnecker
8. K. Kratter

In Instrumentation

1. A. Tokovinin
2. A. Mann
3. B. Mason
4. W. Hartkopf
5. K. Fuhrmann
6. Rolf Chini
7. L. Kaderhandt
8. Zu-Cheng Chen

Citations in the corpus

• Speckle Interferometry at SOAR in 2016 and 2017 (2014, background): “We thank the operators of SOAR D. Maturana (he passed away in 2017), P. Ugarte, S. Pizarro, J. Espinoza, C. Corco, R. Hernandez for efficient support of our program, R. Cantarutti for adapting the HRCam software to the new detector, and N. Law for offering us his iXon-888 camera.”
• Massive pulsating stars observed by BRITE-Constellation - I. The triple system β Centauri (Agena) (2016, background): “New observations made by means of speckle interferometry (Tokovinin et al. 2010, 2014, 2015; Hartkopf et al. 2012) indicate much smaller and rapidly decreasing separation between the components (Fig.”
• THE GALACTIC O-STAR SPECTROSCOPIC SURVEY (GOSSS). II. BRIGHT SOUTHERN STARS (2013, background): “Tokovinin et al. (2010) spatially resolved this system into three tight components with speckle interferometry although Mason et al. (2009) and Aldoretta et al. (in preparation) only see two of them, separated by 63 mas and with a ∆m of 0.6 magnitudes.”
• FROM BINARIES TO MULTIPLES. I. DATA ON F AND G DWARFS WITHIN 67 pc OF THE SUN (2014, neutral): “…2.2 4.0 4.3 Perryman & ESA (1997) WDS all 550 0.15 1.0 10.0 30.0 2.5 5.0 8.0 9.4 5 + 3 log10 ρ ′′ Speckle 604 540 0.03 0.15 1.00 1.50 0.50 4.33 5.63 5.63 Tokovinin et al. (2010a) AO 122 2200 0.09 1.00 2.00 5.00 1.00 6.32 8.60 9.90 Metchev & Hillenbrand (2009) AO 107 2272 0.054 0.15 0.90 9.00 0.0…”
• SOAR TESS Survey. I. Sculpting of TESS Planetary Systems by Stellar Companions (2019, methodology): “This has been verified by injecting simulated binary companions into the real ACFs (see, e.g., Figure 9 in Tokovinin et al. 2010).”
• Multiplicity among Solar-type Stars (2017, background): “12 The Astrophysical Journal, 836:139 (23pp), 2017 February 10 Fuhrmann et al. interferometry by Tokovinin et al. (2010) at epoch 2008.7696 provides Δmy=3.17mag and ρ=0 29 for HR 8061AB.”
• A CHARA ARRAY SURVEY OF CIRCUMSTELLAR DISKS AROUND NEARBY Be-TYPE STARS (2013, methodology): “We assumed that the current separation corresponds to the angular semimajor axis, and we estimated the orbital period by assigning masses assuming main sequence stars, the temperature from Frémat et al. (2005), and the measured △V = 2.7 mag (Tokovinin et al. 2010).”
• SPECKLE INTERFEROMETRY AT SOAR IN 2010 AND 2011: MEASURES, ORBITS, AND RECTILINEAR FITS (2012, methodology): “Speckle interferometry runs at the Blanco and SOAR telescopes in 2008–2009 (Tokovinin et al. 2010c, hereafter TMH10) produced a rich harvest of data (1898 measurements of 1189 pairs) and discoveries (48 newly resolved pairs).”
• SOUTHERN MASSIVE STARS AT HIGH ANGULAR RESOLUTION: OBSERVATIONAL CAMPAIGN AND COMPANION DETECTION (2014, methodology): “◦3, ΔH = 3.40 ± 0.22, and ΔKs = 2.70 ± 0.12 is in agreement with the findings of Tokovinin et al. (2010).”