Optimization of the Observing Cadence for the Rubin Observatory Legacy Survey of Space and Time: A Pioneering Process of Community-focused Experimental Design

Bianco, Federica; Ivezić, Željko; Jones, R. Lynne; Graham, M. L.; Marshall, Phil; Saha, Abhijit; Strauss, Michael A.; Yoachim, Peter; Ribeiro, T.; Anguita, T.; Bauer, F. E.; Bellm, Eric C.; Blum, Robert; Brandt, W. N.; Brough, Sarah; Catelan, M.; Clarkson, William I.; Connolly, Andrew J.; Gawiser, Eric; Gizis, John E.; Hložek, Renée; Kaviraj, Sugata; Liu, Charles; Lochner, Michelle; Mahabal, A.; Mandelbaum, Rachel; McGehee, P.; Neilsen, Eric H.; Olsen, Knut; Peiris, Hiranya V.; Rhodes, Jason; Richards, Gordon T.; Ridgway, Stephen T.; Schwamb, Megan E.; Scolnic, Dan; Shemmer, Ohad; Slater, Colin T.; Slosar, Anže; Smartt, S. J.; Strader, Jay; Street, R. A.; Trilling, David E.; Verma, Aprajita; Vivas, A. K.; Willman, Beth

doi:10.3847/1538-4365/ac3e72

Cited by 61 publications

(62 citation statements)

References 19 publications

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“…Interstellar films with w ≫ w c (Bialy & Loeb 2018), would enter the solar system and could be identified by the upcoming Legacy Survey of Space and Time (LSST) on the Vera C. Rubin Observatory (Bianco et al 2022), as they would reflect sunlight during their passage close to Earth, similarly to the first reported interstellar object 1I/2017 U1/'Oumuamua (Meech et al 2017).…”

Section: Discussionmentioning

confidence: 99%

Galactic Kites

Loeb¹

2022

Preprint

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I show that interstellar films of material thinner than a micron, drift away from the Galactic plane as a result of stellar radiation pressure. Such films, whether produced naturally by dust coagulation in proto-planetary disks or artificially by technological civilizations, would accumulate over the age of the Milky-Way and hover above the Galactic disk at a scale-height set gravitationally by the dark matter halo. Limits on scattered starlight imply that this population carries a fraction below 2 × 10 −3 of the interstellar medium mass.

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Section: Discussionmentioning

confidence: 99%

Galactic Kites

Loeb¹

2022

Preprint

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“…This ensures that the object is within the nominal field of view of the LSST, as the Wide-Fast-Deep is likely to extend to +12°decl. for most right ascensions, according to Figure 1 of Bianco et al (2022). 3.…”

Section: The Population Detectable With the Lsstmentioning

confidence: 99%

“…While the LSST's observational strategy is complex, with the Northern Ecliptic Spur extending to +30°decl. only for some right ascensions (Bianco et al 2022), the Wide-Fast-Deep, which includes all right ascensions, is likely to extend its upper delineation boundary to +12°in most regions. Thus, we adopt +12°as the LSST's nominal field of view.…”

Section: The Population Detectable With the Lsstmentioning

confidence: 99%

The Population of Interstellar Objects Detectable with the LSST and Accessible for In Situ Rendezvous with Various Mission Designs

Hoover¹,

Seligman²,

Payne³

2022

Planet. Sci. J.

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The recently discovered population of interstellar objects presents us with the opportunity to characterize material from extrasolar planetary and stellar systems up close. The forthcoming Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will provide an unprecedented increase in sensitivity to these objects compared to the capabilities of currently operational observational facilities. We generate a synthetic population of ‘Oumuamua-like objects drawn from their galactic kinematics and identify the distribution of impact parameters, eccentricities, hyperbolic velocities, and sky locations of objects detectable with the LSST, assuming no cometary activity. This population is characterized by a clustering of trajectories in the direction of the solar apex and antiapex, centered at orbital inclinations of ∼90°. We identify the ecliptic or solar apex as the optimal sky location to search for future interstellar objects as a function of survey limiting magnitude. Moreover, we identify the trajectories of detectable objects that will be reachable for in situ rendezvous with a dedicated mission with the capabilities of the forthcoming Comet Interceptor or proposed Bridge concept. By scaling our fractional population statistics with the inferred spatial number density, we estimate that the LSST will detect of order ∼15 interstellar objects over the course of its ∼10 yr observational campaign. Furthermore, we find that there should be ∼1–3 and ∼0.0007–0.001 reachable targets for missions with propulsion capabilities comparable to Bridge and Comet Interceptor, respectively. These numbers are lower limits and will be readily updateable when the number density and size–frequency distribution of interstellar objects are better constrained.

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“…There is hope for improved discovery of long-period, lowmass-transfer cataclysmic variables. The all-sky soft X-ray survey of eROSITA should allow better identification of nonmagnetic systems compared to existing X-ray surveys (Schwope 2012; for initial results on individual sources see Zaznobin et al 2022;Schwope et al 2022bSchwope et al , 2022a, and the long time baselines of deep photometric surveys such as ZTF and the Rubin Observatory (Bianco et al 2022) will give increasing sensitivity to cataclysmic variables with rare dwarf nova outbursts.…”

Section: Context and Implicationsmentioning

confidence: 99%

1RXH J082623.6–505741: A New Long-period Cataclysmic Variable with an Evolved Donor and a Low Mass-transfer Rate

Sokolovsky

Strader

Swihart

et al. 2022

ApJ

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We report the discovery of 1RXH J082623.6−505741, a 10.4 hr orbital period compact binary. Modeling extensive optical photometry and spectroscopy reveals a ∼0.4 M ⊙ K-type secondary transferring mass through a low-state accretion disk to a nonmagnetic ∼0.8 M ⊙ white dwarf. The secondary is overluminous for its mass and dominates the optical spectra at all epochs and must be evolved to fill its Roche Lobe at this orbital period. The X-ray luminosity L X ∼ 1–2 × 1032 erg s−1 derived from both new XMM-Newton and archival observations, although high compared to most CVs, still only requires a modest accretion rate onto the white dwarf of M ̇ ∼ 3 × 10−11 to 3 × 10−10 M ⊙ yr−1, lower than expected for a cataclysmic variable with an evolved secondary. No dwarf nova outbursts have yet been observed from the system, consistent with the low derived mass-transfer rate. Several other cataclysmic variables with similar orbital periods also show unexpectedly low mass-transfer rates, even though selection effects disfavor the discovery of binaries with these properties. This suggests the abundance and evolutionary state of long-period, low mass-transfer rate cataclysmic variables are worthy of additional attention.

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Optimization of the Observing Cadence for the Rubin Observatory Legacy Survey of Space and Time: A Pioneering Process of Community-focused Experimental Design

Cited by 61 publications

References 19 publications

Galactic Kites

Galactic Kites

The Population of Interstellar Objects Detectable with the LSST and Accessible for In Situ Rendezvous with Various Mission Designs

1RXH J082623.6–505741: A New Long-period Cataclysmic Variable with an Evolved Donor and a Low Mass-transfer Rate

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