The Weakening Outburst of the Young Eruptive Star V582 Aur

Zsidi, Gabriella; Ábrahám, P.; Acosta–Pulido, J. A.; Kóspál, Á.; Kun, M.; Szabó, Zs. M.; Bódi, Attila; Cseh, B.; Segura, N. Castro; Hanyecz, O.; Ignácz, Bernadett; Kalup, Cs.; Kriskovics, L.; Mészáros, Lukács; Ordasi, A.; Pál, András; Sárneczky, K.; Seli, Bálint; Sódor, Á.; Szakáts, R.

doi:10.3847/1538-4357/ab05c9

Cited by 9 publications

(5 citation statements)

References 19 publications

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“…h May be 1050 L e , depending on the association, whether V582 Aur belongs to Auriga OB1 or Auriga OB2 (Zsidi et al 2019) . i Work by Kuhn & Hillenbrand (2019) using Gaia DR2 parallaxes places V733 Cep at 825 pc, so the updated luminosity is 40L e .…”

Section: Correcting For Stellar Line Contaminationmentioning

confidence: 99%

Measuring Optical Extinction toward Young Stellar Objects Using Diffuse Interstellar Bands

Carvalho

Hillenbrand

2022

ApJ

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Line-of-sight extinction estimates of well-studied young T Tauri and Herbig Ae/Be stars are based on many different measurements and analysis methods. This has resulted in wide scatter among the published A V values for the same star. In this work, we discuss the challenges in measuring extinction to actively accreting and especially outbursting young stellar objects (YSOs). We then explore a method not previously applied to young stars utilizing diffuse interstellar bands (DIBs). In early-type stars, narrow correlations exist between the DIB equivalent widths and the column density of interstellar material, and therefore the line-of-sight extinction. Here, we measure the equivalent widths of the 5780 and 6614 Å DIB features in a sample of actively accreting YSOs, and apply a DIB-reddening calibration to estimate reddening and subsequently extinction. Our calibration is newly derived from a composite of available literature data and fully accounts for the scatter in these measurements. We also compare the DIBs-inferred optical line-of-sight extinction values with previous extinction estimates for our sample stars.

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Section: Correcting For Stellar Line Contaminationmentioning

confidence: 99%

Measuring Optical Extinction toward Young Stellar Objects Using Diffuse Interstellar Bands

Carvalho

Hillenbrand

2022

ApJ

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“…And accordingly, at magnitude minima the spectrum of the V582 Aur is similar to the spectrum of a T Tauri star. The explanation for this spectral and photometric variability is a combination of variable accretion from the circumstellar disc and variable extinction from the circumstellar environment (Semkov et al (2013); Zsidi et al (2019)).…”

Section: V582 Aurmentioning

confidence: 99%

Photometric monitoring of PMS stars with the telescopes at Rozhen Observatory

Semkov,

Ibryamov,

Peneva

et al. 2024

caosp

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For several decades we have been performing photometric monitoring of some of the star formation regions. Significant place in our program take observations of objects of the type FU Orionis, EX Lupi, UX Orionis and other similar but unclassified objects. These three types of young variable objects show changes in brightness with large amplitudes and attract the attention of star formation researchers. But it is not always possible to distinguish them from each other without the presence of long-term multicolor photometric data. For this reason, we collect data from current CCD observations and supplement them with data from the photographic plates archives. In this paper, we show the latest data from optical photometric studies of four PMS objects (V2493 Cyg, V582 Aur, V733 Cep and V1180 Tau) made at the Rozhen Observatory. Our monitoring is carried out in BV RI filters, which allows studying the variability in color indexes also. By analysis the historical light curves of these objects we are trying to obtain information about the processes associated with the early stages of stellar evolution.

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“…Its brightening started between 1984 and 1985, it reached its maximum in 1986, and it is still close to maximum brightness (Semkov et al 2013). Its flat spectral energy distribution (SED) and millimeter observations indicate a significant amount of circumstellar material, including a massive envelope ( Ábrahám et al 2018;Zsidi et al 2019).…”

Section: Target Selectionmentioning

confidence: 99%

Grain growth in newly discovered young eruptive stars

Kóspál,

Ábrahám,

Carmona

et al. 2020

Preprint

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FU Orionis-type stars are young stellar objects showing large outbursts due to highly enhanced accretion from the circumstellar disk onto the protostar. FUor-type outbursts happen in a wide variety of sources from the very embedded ones to those with almost no sign of extended emission beyond the disk. The subsequent eruptions might gradually clear up the obscuring envelope material and drive the protostar on its way to become a disk-only T Tauri star. We used VLT/VISIR to obtain the first spectra that cover the 8 − 13 µm mid-infrared wavelength range in low-resolution of five recently discovered FUors. Four objects from our sample show the 10 µm silicate feature in emission. We study the shape and strength of the silicate feature in these objects and find that they mostly contain large amorphous grains, suggesting that large grains are typically not settled to the midplane in FUor disks. This is a general characteristic of FUors, as opposed to regular T Tauri-type stars whose disks display anything from pristine small grains to significant grain growth. We classify our targets by determining whether the silicate feature is in emission or in absorption, and confront them with the evolutionary scenarios on the dispersal of the envelopes around young stars. In our sample, all Class II objects exhibit silicate emission, while for Class I objects, the appearance of the feature in emission or absorption depends on the viewing angle with respect to the outflow cavity. This highlights the importance of geometric effects when interpreting the silicate feature.

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The Weakening Outburst of the Young Eruptive Star V582 Aur

Cited by 9 publications

References 19 publications

Measuring Optical Extinction toward Young Stellar Objects Using Diffuse Interstellar Bands

Measuring Optical Extinction toward Young Stellar Objects Using Diffuse Interstellar Bands

Photometric monitoring of PMS stars with the telescopes at Rozhen Observatory

Grain growth in newly discovered young eruptive stars

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